NEET Level Test (01-Jan-23) Part Syllabus

Biology I - Section A

1. Read the given statements and select the correct option.

Statement-A:	One can breathe out air through eustachian tubes by closing both the nose and the mouth.
Statement-B:	External inter-costal and abdominal muscles are muscles involved in inspiration under normal breathing.

1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement B is correct

2. Given below is the representation of partial pressures (in mm Hg) of oxygen and carbon dioxide in different parts involved in diffusion in comparison to those in the atmosphere.

Respiratory gas	O₂	CO₂
Atmospheric air	A	0.3
Alveoli	104	40
Blood (oxygenated)	B	40
Blood (deoxygenated)	40	C
Tissue	D	45

Choose the option which mentions the correct values of A, B, C and D:

	A	B	C	D
1.	159	45	95	40
2.	159	95	45	40
3.	145	40	45	95
4.	104	45	45	40

3. Read the given statements carefully.

(a)	The systemic circulation provides nutrients, CO_2,and other essential substances to the tissues and takes O₂and other harmful substances away for elimination.
(b)	Heart of both humans and cockroach is myogenic.
(c)	Intestinal juice along with pancreatic juice is known as succus entericus.
(d)	The SAN can generate the maximum number of action potentials, i.e., 70-75 min^–1

How many of the given statements are correct?
1. Four
2. Three
3. Two
4. One

4.

Many of the pancreatic enzymes must be activated by trypsin before they can begin digesting food. But trypsin itself requires the activating effect of:-
1. chymotrypsin
2. carboxypeptidase
3. phospholipase
4. enterokinase

5. Which of the following is incorrect with respect to the second heart sound?
1. Produced by the closure of semilunar valves
2. Low pitched as compared to first heart sound
3. Heard at the beginning of ventricular diastole
4. It is of short duration

6. Arrange in the correct sequence in respect of respiration:

A.	Breathing or pulmonary ventilation by which air is drawn in and CO₂ rich air is released out
B.	Diffusion of O₂ and CO₂ between blood and tissue
C.	Transport of gases by the blood
D.	Diffusion of O₂ and CO₂ across alveolar membrane
E.	Utilization of O₂ by the cells for catabolic reactions and resultant release of CO₂

Choose the correct answer from the options given below:
1. A > B > C > D > E
2. A > C > D > B > E
3. D > B > C > E > A
4. A > D > C > B > E

7.

Which of the following is a sub-mucosal gland?
1. Oxyntic glands of stomach
2. Crypts of Lieberkuhn of small intestine
3. Brunner's glands of the duodenum
4. Goblet cells

8. Select the correct statement.

1.	Mammals have negative pressure breathing.
2.	Inspiration is initiated by the relaxation of diaphragm.
3.	There is an increase in the volume of thoracic chamber in the dorso-ventral axis due to the contraction of diaphragm.
4.	Forceful expiration is a passive process.

9. In a healthy body, heart muscles are supplied with oxygenated blood through coronary arteries. But under abnormal conditions the lumen of arteries becomes narrow. Which of the following is appropriate to the above-mentioned conditions?

1.	Acute chest pain appears when enough O₂is not reaching the heart muscle and thus leading to Angina.
2.	Congestion of the lungs leads to heart failure.
3.	Deposition of calcium, fat, cholesterol, and fibrous tissues lead to Atherosclerosis.
4.	Deposition of calcium, and cholesterol leads to heart failure.

10. Match the blood groups in column I with their antibodies present in plasma in column II and select the correct option:

	Column I		Column II
(i)	A	(a)	Anti-B
(ii)	AB	(b)	Anti-A
(iii)	O	(c)	Nil
(iv)	B	(d)	Anti-A, B

1. (i)-(a), (ii)-(c), (iii)-(b), (iv)-(d)
2. (i)-(a), (ii)-(c), (iii)-(d), (iv)-(b)
3. (i)-(b), (ii)-(c), (iii)-(d), (iv)-(a)
4. (i)-(a), (ii)-(d), (iii)-(c), (iv)-(b)

11.

What prevents the backflow of fecal matter into the small intestine?
1. Ileo-caecal valve
2. Sphincter of Boyden
3. Meckel's diverticulum
4. Plicae semilunaris

12. Three structures A, B, and C play a significant role in maintaining and moderating the respiratory rhythm to suit the demands of the body tissues.
A is present in the pons region.
B is adjacent to C.
C is present in the medulla region of the brain.
Choose the option which identifies A, B, and C.

	A	B	C
1.	Respiratory rhythm centre	Pneumotaxic centre	Chemosensitive area
2.	Pneumotaxic centre	Respiratory rhythm centre	Chemosensitive area
3.	Chemosensitive area	Respiratory rhythm centre	Pneumotaxic centre
4.	Chemosensitive area	Pneumotaxic centre	Respiratory rhythm centre

13. Read the given statements and select the correct option:

(a)	The volume of blood pumped out by the right and left ventricles is the same during each cardiac cycle.
(b)	A person whose blood group is O has both A and B antigens on his/her RBCs.
(c)	Blood normally contains 15,000-35,000 platelets mm^-3 of blood.

1. Statements (a) and (b) are correct, (c) is incorrect
2. Only statement (c) is correct
3. Statements (b) and (c) are correct, (a) is incorrect
4. Only statement (a) is correct

14.

The following is the diagrammatic representation of standard ECG. Identify the correct statement :

1.	P is caused by atrial repolarization.
2.	Q, when present, always shows myocardial ischemia.
3.	QRS complex is due to time taken by impulse from SA node to AV node.
4.	T is caused by ventricular repolarization.

15.

Which digestive organ mechanically and chemically transforms a food bolus into chyme?
1. esophagus
2. stomach
3. small intestine
4. large intestine

16.

How do parasympathetic neural signals affect the working of the heart?
1. Reduce both heart rate and cardiac output
2. Heart rate is increased without affecting the cardiac output
3. Both heart rate and cardiac output increase
4. Heart rate decreases but cardiac output increases

17.

There is a possibility of exposure of the maternal blood [of Rh -ve mother] to small amounts of Rh +ve blood from the fetus during the:
1. First trimester of any pregnancy
2. Third trimester of the second pregnancy only
3. Delivery of the child
4. There is no such possibility

18.

'Erythroblastosis Foetails' occurs when:
I. Mother is Rh⁺ and foetus is Rh^-.
II. Mother is Rh^- and foetus is Rh⁺.
III. Mother and foetus both are Rh⁺.
IV. Mother and foetus both are Rh^-.
1. I & II
2. Only I
3. Only II
4. II, III & IV

19. Read the given statements carefully.

(a)	Congestion of lungs is one of the main symptoms of heart failure.
(b)	Each vein has an inner lining of cuboidal endothelium, called tunica intima.
(c)	The cardiac output of an athlete will be much lower than that of an ordinary man.

Select the correct option.
1. Only statements (a) and (b) are correct.
2. Only statements (a) and (c) are correct.
3. Only statement (c) is correct.
4. Only statements (b) and (c) are incorrect.

20.

Which of the following gastric secretory cells is correctly matched with its secretion(s)?
1. Chief cells - gastrin
2. parietal cells -- hydrochloric acid and intrinsic factor
3. enteroendocrine cells -- mucus and hormones
4. mucous cells -- pepsinogen and mucus

21.

An increase from pH 7.2 to pH 7.4 around hemoglobin causes:

1.	hemoglobin to release all bound oxygen molecules.
2.	an increase in the affinity of hemoglobin to bind oxygen molecules.
3.	hemoglobin to denature.
4.	an increase in the binding of H⁺ by hemoglobin.

22. Match List I with List II:

List I	List II
A. Expiratory capacity	I. TV + IRV
B. Vital capacity	II. ERV + TV + IRV
C. Inspiratory capacity	III. TV + ERV
D. Functional residual capacity	IV. ERV + RV

Choose the correct answer from the options given below:
1. A - (IV); B - (II); C - (I); D - (III)
2. A - (II); B - (I); C - (IV); D - (III)
3. A - (III); B - (II); C - (I); D - (IV)
4. A - (I); B - (II); C - (III); D - (IV)

23. Which of the following is not related to the regulation of cardiac activity?

1.	Neural signals through the sympathetic nerves can increase the rate of heartbeat
2.	Parasympathetic neural signals decrease the rate of heartbeat
3.	Neural signals through the sympathetic nerves can decrease the rate of heartbeat
4.	Adrenal medullary hormones increase the cardiac output

24. Values of partial pressure of oxygen and carbon dioxide in alveolar air are 104 mm Hg and 40 mm Hg respectively. Similar values in the venous blood are:
1. 104 mm Hg and 40 mm Hg
2. 40 mm Hg and 45 mm Hg
3. 46 mm Hg and 37 mm Hg
4. 120 mm Hg and 60 mm Hg

25. Michael has been a chain smoker throughout his life since he was a teenager. At the age of 47, he now has difficulty in breathing. After going to the doctor and conducting a couple of tests he found out that he has a chronic disorder in which there is damage in his alveolar wall.
What is Michael suffering from?
1. Asthma
2. Asbestosis
3. Silicosis
4. Emphysema

26. Match the type of salivary glands in humans (Column I) with their location (Column II) and select the correct option.

	Column I		Column II
a.	Sub-maxillary	(i)	Near cheek
b.	Parotids	(ii)	Lower jaw
c.	Sub-linguals	(iii)	Below the tongue

1. a(ii), b(iii), c(i)
2. a(i), b(ii), c(iii)
3. a(ii), b(i), c(iii)
4. a(iii), b(i), c(ii)

27. If 2100 mL of blood is filtered by the kidneys per minute and each ventricle pumps out approximately 100 mL of blood per cycle, then calculate the heartbeat rate.
1. 75 beats/min
2. 105 beats/min
3. 70 beats/min
4. 90 beats/min

28.

Epithelial cells of the intestine involved in food absorption have on their surface -
1. Zymogen granules
2. Pinocytic vesicles
3. Phagocytic vesicles
4. Microvilli

29. Given below is a list of characteristics.
a. Located below the diaphragm
b. Located between the lungs
c. Weights about 1200 gms to 1500 gms
d. Has 3 lobes
e. Has 2 lobes
f. Its structural and functional units are covered by Glisson’s capsule
Choose the option which includes all the characteristics which are applicable to the largest gland of the body:
1. a, b, c, and d
2. b, d, and e
3. a, c, e, and f
4. a, c, d, and f

30. Match column I with column II and choose the correct option:

	Column I		Column II
a.	Constipation	(i)	Faeces retained
b.	Vomiting	(ii)	Controlled by a centre in medulla
c.	Jaundice	(iii)	Liver is affected

1. a(i), b(ii), c(iii)
2. a(iii), b(ii), c(i)
3. a(i), b(iii), c(ii)
4. a(ii), b(i), c(iii)

31.

The number of incorrect statements amongst the given statements is:
I. The tongue is attached to the roof of the oral cavity by the frenulum.
II. The structural and functional units of the human liver are the hepatic lobules.
III. Lysozyme present in saliva acts as an antibacterial agent that prevents infection.
IV. Brunner’s glands are located in the submucosa of the duodenum.
V. No significant digestive activity occurs in the large intestine.
1. 1
2. 3
3. 4
4. 5

32. A woman is tested for hemoglobin level in her blood and reports showed that the level of Hg is 9 gm in 100 ml of blood. It indicates:
1. Normal level
2. More than normal level
3. Less than normal level
4. Very less than normal level

33. How many of the given factors affect the exchange of gases between blood and tissues?
a. Thickness of diffusion membrane
b. Solubility of gases
c. Pressure gradient
d. Concentration gradient
Mark the correct option from the following:
1. Two
2. One
3. Four
4. Zero

34. Match column-I with column-II and select the correct option:

	Column-I		Column-II
(a)	Monocytes	(i)	Non-nucleated cell fragments
(b)	Eosinophils	(ii)	Bilobed nucleus
(c)	Neutrophils	(iii)	Nucleus is bean-shaped
(d)	Platelets	(iv)	Many lobed nucleus

1. a(iii), b(ii), c(iv), d(i)
2. a(ii), b(iii), c(iv), d(i)
3. a(iii), b(ii), c(i), d(iv)
4. a(iv), b(iii), c(ii), d(i)

35.

In the given diagram of the transverse section of the gut, the longitudinal muscles are represented by the letter:

1. A
2. B
3. C
4. D

Biology I - Section B

36.

Which selection includes only accessory digestive organs?
1. salivary glands, thyroid gland, pancreas, liver
2. stomach, duodenum, pancreas, gallbladder
3. gallbladder, liver, pancreas, salivary glands
4. liver, thyroid gland, gallbladder, spleen

37.

What is true about the cell shown in the given diagram?

1. It is the rarest WBC found in the blood.
2. It is the largest WBC.
3. Its number is increased in acute bacterial infections.
4. It is involved in the transport of blood gases.

38. Choose the incorrect match among the following:

	Enzyme	Site of action	Substrate
1.	Nucleases	Intestine	Nucleic acids
2.	Pepsin	Stomach	Dipeptides
3.	Salivary amylase	Mouth	Starch
4.	Sucrase	Intestine	Sucrose

39. Assertion (A): Gaseous exchange in mammals occurs in alveoli, air sacs clustered at the tips of the finest bronchioles.
Reason (R): The type of epithelial layer of serous membranes such as the pleura is the same as that found in alveoli.
In light of the above statements, choose the correct option:
1. (A) and (R) are true, (R) is the correct explanation of (A)
2. (A) and (R) are true, (R) is not the correct explanation of (A)
3. (A) is true, (R) is false
4. (A) is false, (R) is true

40.

Which of the following does not shift the oxy-haemoglobin dissociation curve to the right?
1. increased pH
2. increased carbon dioxide
3. increased temperature
4. increased 2,3 -DPG

41. Match column-I with column-II and select the correct option:

	Column-I		Column-II
a.	Atherosclerosis	(i)	Liver is affected
b.	Angina	(ii)	Feeling of nausea
c.	Jaundice	(iii)	Acute chest pain
d.	Vomiting	(iv)	Deposition of calcium, cholesterol, etc in arteries

1. a(iii), b(iv), c(i), d(ii)
2. a(iv), b(iii), c(ii), d(i)
3. a(iv), b(i), c(iii), d(ii)
4. a(iv), b(iii), c(i), d(ii)

42. The total volume of air accommodated in the lungs at the end of a forced inspiration in a healthy adult individual can be represented as:
(a) IC + FRC
(b) ERV + RV + TV+ IRV
(c) ERV + TV+ IRV
(d) RV + IRV + EC
Select the correct option.
1. only a
2. (a), (b) and (d)
3. (a), (b), (c) and (d)
4. Only (b) and (d)

43. Read the given statements carefully:

A.	RBCs are devoid of nucleus in most of the mammals and are biconvex in shape.
B.	Lymph has the same mineral distribution as that in plasma.
C.	By counting the number of QRS complexes in ECG that occur in a given time period, one can determine the heartbeat rate of an individual.
D.	Heart is an endodermally derived organ.

How many of the given statements are correct?
1. Three
2. Four
3. Two
4. One

44.

Which part of the specialized conducting system of the human heart is auto-excitable?

I.	SA Node	II.	AV node
III.	AV bundle	IV.	Purkinje fibers

1. I and II only
2. I, II and III only
3. II, III and IV only
4. I, II, III and IV

45. Total volume of air accommodated in the lungs at the end of a forced inspiration is:
1. VC + FRC
2. IC + ERV
3. ERV + TV + IRV – EC
4. TV + IRV + FRC

46. Assertion(A): The food and the acidic gastric juice in the stomach are mixed thoroughly to form chyme.
Reason(R): Muscular layer present in the stomach enables better churning of food.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

47. Choose the incorrect match with respect to GIT hormones and their source gland:

1.	Gastrin	-	Stomach
2.	GIP	-	Duodenum
3.	Cholecystokinin	-	Small intestine
4.	Secretin	-	Large intestine

48.

The following statements refer to gas carriage by blood. Choose the correct statement:

1.	After leaving the lungs, each litre of blood contains about 20 ml of oxygen.
2.	Haemoglobin is half saturated with oxygen when the PO₂ is about 30 mm Hg
3.	As the PCO₂ rises, the affinity of haemoglobin for oxygen is increased.
4.	Each litre of arterial blood contains about 50 mL of carbon dioxide.

49.

The first heart sound or the 'lubb' is produced:
1. Near the end of the atrial systole
2. Immediately after the start of the ventricular systole
3. Near the end of the ventricular systole
4. Immediately after the start of the ventricular diastole

50.

What happens during ventricular diastole?
1. both ventricles fill with blood
2. both semilunar valves remain open
3. both AV valves remain closed
4. both ventricles contract

Biology II - Section A

51. In root nodules of legumes, leg-haemoglobin is important because it:
1. Facilitates oxygen supply to the root nodule
2. Protects nitrogenase enzymes from denaturation
3. Provides energy to the nitrogen fixing bacterium
4. Acts as a catalyst in transamination

52.

Transport Proteins:
1. can perform only passive transport
2. perform passive transport as well as active transport
3. are needed only in active transport
4. may be required for simple diffusion

53.

Transamination:

(1) Involves the transfer of amino group from one amino acid to the keto group of keto acid.
(2) Involves the transfer of amino group from one amino acid to the amino group of another amino acid.
(3) Involves the transfer of keto group from one amino acid to the keto group of keto acid.
(4) Involves the transfer of keto group of keto acid to the keto group of keto acid.

54.

The C4 plants differ from C3 plants with reference to the:

1.	substrate that accepts CO₂ in carbon assimilation
2.	type of end product
3.	type of pigment involved in photosynthesis
4.	end product that will be formed

55.

The criteria for essentiality of an element for a plant include all except:
1. It must be absolutely necessary for supporting normal growth and reproduction.
2. The requirement must be specific and not replaceable by another element.
3. It must be directly involved in the metabolism of the plant.
4. They must be present in the plants in a concentration in excess of 10 mmole/Kg of dry matter.

56.

Column I	Column II
i. grana	a. dark reaction
ii. Stroma	b. light reaction
	c. synthesis of ATP and NADPH⁺H⁺
	d. synthesis of sugar

1.	i-b, c; ii-a, d.
2.	i-a, d; ii-b, c.
3.	i-b, d; ii-a,c.
4.	i-b; ii-a, c, d.

57.

Which of the following statement is incorrect?

1.	Electrons to PS-I are provided by PS-II
2.	Electrons to PS-II are provided by the splitting of water
3.	Electrons to PS-I are provided by the splitting of water
4.	PS-II is physically located on the inner side of the membrane of the thylakoid.

58.

Which of the following is wrong regarding photorespiration?
1. utilization of ATP
2. Production of little sugar
3. Release of CO₂
4. Wasteful Process

59.

Stomata opens:
(1) in day time - for gaseous exchange
(2) in day time - no gaseous exchange
(3) in night time only - for gaseous exchange
(4) in night time only - no gaseous exchange

60.

During plasmolysis:
1. Water is lost from the cytoplasm but not from the vacuole
2. Water is first lost from the cytoplasm and then from the vacuole
3. Water is first lost from the vacuole and then from the cytoplasm
4. Water is lost from the vacuole but not from the cytoplasm

61.

Choose the incorrect option with respect to stroma lamellae:

1.	Presence of PS l
2.	Site of cyclic photophosphorylation
3.	Perform photosynthesis at wavelength > 680 nm
4.	Presence of NADP + reductase

62.

Which of the following is not related to Julius Von Sachs?
1. A prominent German Botanist
2. In 1860, he demonstrated for the first time that plants could be grown to maturity in a defined nutrient solution in the complete absence of soil
3. The technique, Hydroponics
4. Categorized the essential and non-essential mineral nutrition.

63.

Plasmodesmata are:
1. Connections between adjacent cells
2. Lignified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma

64.

Which of the following statements is correct?

1.	Photorespiration is useful process.
2.	C4 plants are more efficient than C3 plants.
3.	C4 plants are less efficient than C3 plants.
4.	Photorespiration is absent in C3 plants but present in C4 plants.

65.

Which of the following statement is correct?

1.	H₂S is the hydrogen donor for purple and green sulphur bacteria.
2.	H₂O is the hydrogen donor for purple and green sulphur bacteria.
3.	Oxygen is evolved by the purple and green sulphur bacteria.
4.	Oxygen evolved by the green plants comes from CO₂.

66. Given below are two statements:

Assertion (A):	For evolution of O₂ in photosynthesis, PS-II is required.
Reason (R):	PS II is reduced by pulling electrons from water due to which photolysis of H₂O occurs.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

67.

The _____________ in the leaves have a large number of_________, which align themselves along the walls of the ____________, such that they get the __________quantity of the incident light.

1.	chloroplasts, chlorophyll, chloroplasts, optimum.
2.	mesophyll cells, chlorophyll, mesophyll cells, optimum.
3.	mesophyll cells, chloroplasts, mesophyll cells, optimum.
4.	mesophyll cells, chloroplasts, mesophyll cells, minimum.

68.

Micronutrients are found in:

(1) More than 10mmole per Kg of dry matter
(2) Less than 10mmole per Kg of dry matter
(3) Around 1mmole per Kg of dry matter
(4) Less than 1mmole per Kg of dry matter

69.

Which of the following is not an after-effect of water stress?
1. Reducing CO₂ availability
2. Closure of stomata
3. Reducing metabolic activity
4. Increased surface area

70.

Dark reaction in photosynthesis is called so because:
1. It can occur in dark also
2. It does not depend on light energy
3. It cannot occur during day light
4. It occurs more rapidly at night

71.

I.	C4 pathway is found in plants adapted to dry tropical regions.
II.	C3 pathway is the Maine biosynthetic pathway in C4 plants.
III.	C4 plants have greater productivity of biomass.

1.	All are correct
2.	Only II is incorrect
3.	Only III is correct
4.	Both (II) and (III) are correct

72.

Enzyme Nitrogenase is:

(1) Highly sensitive to the molecular oxygen
(2) Least sensitive to the molecular oxygen
(3) Highly sensitive to carbon dioxide
(4) Least active enzyme

73.

Select the incorrect statement from the following:
(1) The amides - asparagine and glutamine are found in plants as a structural part of the protein.
(2) Amides contain less nitrogen than amino acids.
(3) ${NH}_{2}$ radicles are transported to other parts via xylem.
(4) In soyabean, the fixed nitrogen is transported as ureides.

74. Water molecules are unable to penetrate the inner boundary of the root cortex due to:
1. Non-suberization of the endodermis wall region
2. Movement of the water through symplast
3. Movement of the water always takes place through the apoplast
4. Presence of Casparian strips in the endodermis

75.

What does A, B, and C represent in the given diagram of thylakoid?

1 PS ll, Cyt b-f, $F_{0}$
2 Cyt b-f, PS ll, $F_{1}$
3 Cyt b-f, PS l, $F_{1}$
4 PS l, Cyt b-f, $F_{0}$

76.

Diffusion is very important to plants since:
1. The cells have a permeable cell wall
2. It is the only means for gaseous movement within the plant body.
3. Plants cannot transport material by active transport.
4. They are unable to move towards the source of the nutrients.

77.

Based on the figure given below, which of the following statements is not correct?

1.	Movement of solvent molecules will take place from chamber A to B.
2.	Movement of solute will take place from A to B.
3.	Presence of a semipermeable membrane is a pre-requisite for this process to occur.
4.	The direction and rate of osmosis depend on both the pressure gradient and concentration gradient.

78.

The correct equation, representing the overall process of photosynthesis is –

1.	6CO₂ + 6H₂O → C₆H₁₂O₆ + 6H₂O + 6O₂
2.	6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
3.	6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + 6H₂O
4.	6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + H₂O

79.

What does chemiosmosis require?

1.	membrane, cytosol, proton pump, ATPase, and proton gradient
2.	membrane, cytosol, proton pump, and H-ions
3.	membrane, protonpump, ATPase and proton gradient
4.	membrane, cytosol, proton pump, ATPase and proton gradient, and H-ions

80.

Choose the incorrect option with respect to imbibition:
1. Special type of diffusion
2. Depends on affinity between adsorbent and adsorbate
3. Responsible for emergence of seedlings
4. Occurs against concentration gradient

81.

In active transport, carrier proteins are used, which use energy in the form of ATP, to:
(1) transport molecules against the concentration gradient of the cell wall.
(2) transport molecules along the concentration gradient of the cell membrane.
(3) transport molecules against the concentration gradient of the cell membrane.
(4) transport molecules along the concentration gradient of the cell wall.

82. In the thylakoid membranes, what is the main role of the antenna pigment molecules?

1.	split water and release oxygen to the reaction-center chlorophyll
2.	harvest photons and transfer light energy to the reaction-center chlorophyll
3.	synthesize ATP from ADP and P_i
4.	transfer electrons to ferredoxin and then NADPH

83.

What is true for both symplast and apoplast movement of water in plants?
1. An equal rate of transport
2. Being down a potential gradient
3. Assistance by cytoplasmic streaming
4. Conduction through interconnected protoplasts

84.

Which pair is wrong:

1.	C₃ – Maize
2.	C₄ – Kranz anatomy
3.	Calvin cycle - PGA
4.	Hatch and Slack cycle – O.A.A

85.

I. Regulation of metabolic activities
II. Activation of certain enzymes
III. Involved in the normal functioning of the cell wall and required for the formation of the mitotic spindle.
Which of the following ion is best suitable for it?

(1) Ca++
(2) K+
(3) Zn++
(4) Cl-

Biology II - Section B

86.

In Kranz's anatomy, the bundle sheath cells have:

1.	thick walls, many intercellular spaces, and few chloroplasts
2.	thin walls, many intercellular spaces, and no chloroplasts
3.	thick walls, no intercellular spaces, and a large number of chloroplasts
4.	thin walls, no intercellular spaces, and several chloroplasts

87.

Find an incorrect match with respect to the catalytic effect of minerals:
1. Dinitrogenase - Mo
2. Alcohol dehydrogenase - Zn
3. PEP carboxylase - Mg
4. Carbonic anhydrase - Ca

88.

Find the correct one.
1. All the solutions have lower water potential than pure water given that solution is under external pressure.
2. All the solutions have lower water potential than pure water.
3. All the solutions have higher water potential than pure water.
4. All the solutions have lower water potential than pure water unless the solution is under such external pressure which is more than the solute potential.

89. Given below are two statements:
Statement I: In the process of water movement in plants "root pressure" is responsible for pushing up water to a small height in the stem.
Statement II: "Root pressure" is responsible for the upward flow of water through the xylem.
In light of the above statements, choose the most appropriate answer from the options given below.
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is true

90.

Which one of the following is a case of wrong matching?
1. Root pressure - observable at night and early morning
2. Pressure potential - usually negative
3. Symplast - plasmodesmata
4. Loading of sugars at source - active transport

91. In Hatch and Slack pathway, carboxylation of RuBP and decarboxylation of C4 acid occurs in:

1.	Mesophyll cell and bundle sheath cells, respectively
2.	Bundle sheath cells and mesophyll cells, respectively
3.	Both in mesophyll cells
4.	Both in bundle sheath cells

92.

Critical concentration is the concentration of:

(1) Any element below which plant growth is retarded but reproduction is not compromised.
(2) Essential element below which plant growth is retarded.
(3) Beneficial elements below which plant growth is retarded.
(4) Beneficial elements above which plant growth is retarded.

93. Consider the following main reactions in the tricarboxylic acid cycle and arrange them in order:

A.	Condensation
B.	Dehydrogenation
C.	Isomerization
D.	Oxidative decarboxylation
E.	Substate-level phosphorylation

Choose the correct one from the options given below:

1.	A > C > D > E > B
2.	A > B > C > D > E
3.	C > A > B > E > D
4.	A > D > E > C > B

94.

Find the incorrect statement with respect to Mycorrhiza:

(1) Symbiotic association of a fungus with a root system.
(2) Fungal hyphae have a very large surface area.
(3) The hyphae absorb mineral ions and water from the soil from a much larger volume of soil that perhaps a root cannot do.
(4) Roots provide sugar and S-containing compounds to the mycorrhizae.

95.

Which statement is incorrect:

1.	The $F_{1}$ part of ATPase enzyme present on the surface of the membrane on the side that faces the stroma.
2.	The $F_{0}$ is embedded in the membrane and forms a transmembrane channel.
3.	Conformational change in the $F_{0}$ particle makes the enzyme synthesize several molecules of energy-packed ATP.
4.	All the above are correct.

96. How many statement(s) given below is/are true with respect to mass flow hypothesis?
a. The process of loading at the source produces a hypertonic condition in the phloem.
b. Sugar solution flows to regions of low turgor pressure.
c. Sugars are loaded into the sieve tube by passive transport.
d. Water from the adjacent xylem moves into the phloem by osmosis.
1. Three
2. Two
3. Four
4. One

97.

The changes in turgor pressure in guard cells result primarily from the reversible absorption and loss of:
1. H⁺
2. K⁺
3. Cl^-
4. HCO3^-

98.

Identify the incorrect match:

		C₃ plants	C₄ plants
1.	Primary carbon dioxide acceptor	RuBP	PEP
2.	Primary carbon dioxide fixation product	PGA	OAA
3.	Presence of PEPcase	Yes	Yes
4.	Cell type in which initial carboxylation reaction occurs	Mesophyll	Bundle sheath

99. Read the following statements and select the correct option:
Statement A: Adhesion is the attraction of water molecules to polar surfaces.
Statement B: Transpiration cools leaf surfaces by evaporative cooling.
1. Only statement A is true
2. Only statement B is true
3. Both statements are false
4. Both statements are true

100.

Which one of the following is correctly matched?
1. Passive transport of nutrients-ATP
2. Apoplast- Plasmodesmata
3. Potassium- Readily mobilized
4. Bakanae of rice seedlings-F Skoog

Chemistry - Section A

101. In the reaction:
$\mathrm{ N_2H_4(l) + 2 H_2O_2 \rightarrow N_2(g) +4H_2O(l) }$
Oxidant and reductant respectively are:
1. $\mathrm{H_2O_2 ~, ~N_2H_4 }$
2. $\mathrm{H_2O_2 ~, ~N_2 }$
3. $\mathrm{N_2H_4 ~, ~H_2O }$
4. $\mathrm{N_2H_4 ~,~H_2O_2 }$

102.

An aqueous solution of 1M NaCl and 1M HCl is :
1. not a buffer but pH < 7
2. not a buffer but pH >7
3. a buffer with pH <7
4. a buffer with pH >7

103.

The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol^-1 respectively. The enthalpy of the formation of carbon monoxide per mole is:
1. 110.5 kJ
2. 676.5 kJ
3. -676.5 kJ
4. -110.5 kJ

104.

The first and second dissociation constants of an acid H₂A are 1.0 × 10^–5 & 5.0 × 10^–10 respectively. The overall dissociation constant of the acid will be :

1.	5.0 × 10^–5	2.	5.0 × 10¹⁵
3.	5.0 × 10^–15	4.	0.2 × 10⁵

105. $K_C=\frac{[H_2]^4}{[H_2O]^4} $ is written for a particular reaction. The corresponding reaction is:
1. $3 \mathrm{Fe}(\mathrm{s})+4 \mathrm{H}_2 \mathrm{O}(\mathrm{g}) \rightleftharpoons \mathrm{Fe}_3 \mathrm{O}_4(\mathrm{s})+4 \mathrm{H}_2(\mathrm{g}) $
2. $\mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightleftharpoons \mathrm{H}_2(\mathrm{g})+1 / 2 \mathrm{O}_2(\mathrm{g}) $
3. $4 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightleftharpoons 4 \mathrm{H}_2(\mathrm{g})+2 \mathrm{O}_2(\mathrm{g}) $
4. $4 \mathrm{H}_2(\mathrm{g})+2 \mathrm{O}_2(\mathrm{g}) \rightleftharpoons 4 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) $

106. Assertion: In CrO₅, the oxidation number of Cr is +6.
Reason: CrO₅has a butterfly structure in which peroxide bonds are present.

1.	Both statements are TRUE and Reason is the correct explanation of Assertion.
2.	Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3.	Assertion is TRUE and Reason is FALSE.
4.	Assertion is FALSE and Reason is TRUE.

107.

Lattice energy and enthalpy of the solution of NaCl are 788 kJ mol^–1 and 4 kJ mol^–1 , respectively. The hydration enthalpy of NaCl is:
1. –780 kJ mol^–1
2. –784 kJ mol^–1
3. 780 kJ mol^–1
4. 784 kJ mol^–1

108. The correct statement regarding the equilibrium constant(K) of a specific reaction is:

1.	It may be changed by the addition of a catalyst.
2.	It increases if the concentration of one of the products increases.
3.	It changes with changes in temperature.
4.	It increases if the concentration of one of the reactants is increased.

109. Select the correct option for the relationship between root mean square speed (U_r_ms), average speed (U_av), and the most probable speed (U_mp) :
1. U_r_ms > U_mp > U_av
2. U_r_ms> U_av> U_mp
3. U_av> U_mp> U_r_ms
4. U_mp > U_r_ms > U_av

110. The intensive property among the following is:
1. Volume
2. Enthalpy
3. Molar heat capacity
4. Internal energy

111.

Correct statement regarding the heating of a liquid is -
1. Surface tension increases
2. Surface tension is lowered
3. Viscosity increases
4. Surface tension is not affected

112.

The volume occupied by 4.75 g of acetylene gas at 50 °C and 740 mmHg pressure is-
[Given R = 0.0826 L atm K^–1 mol^–1]
1. 6 L
2. 5 L
3. 8 L
4. 10 L

113.

Find the energy exchanged (in kJ) when 2.7 g of aluminum reacts with a stoichiometric amount of ${Fe}_{2} O_{3}$ ?
$2 A l + F e_{2} O_{3} \to 2 F e + A l_{2} O_{3}; Δ H^{0} = - 852 kJ$
1. 852 kJ
2. 426 kJ
3. −42.6 kJ
4. +42.6 kJ

114. Among the following an example of a disproportion reaction is:
1. $2 \mathrm{Na}_2 \mathrm{CrO}_4+2 \mathrm{H}^{+} \rightarrow \mathrm{Na}_2 \mathrm{Cr}_2 \mathrm{O}_7+2 \mathrm{Na}^{+}+2 \mathrm{H}_2 \mathrm{O} $
2. $\mathrm{Na}_2 \mathrm{CrO}_7+2 \mathrm{KCl} \rightarrow \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+2 \mathrm{NaCl} $
3. $3 \mathrm{MnO}_4^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_4^{-}+\mathrm{MnO}_2+2 \mathrm{H}_2 \mathrm{O} $
4. $2 \mathrm{KMnO}_4 \rightarrow \mathrm{K}_2 \mathrm{MnO}_4+\mathrm{MnO}_2+\mathrm{O}_2 $

115.

At 1990 K and 1 atm pressure, there are an equal number of Cl₂ molecules and Cl atoms in the reaction mixture.
The value of K_P for the reaction ${Cl}_{2 (g)} ⇌ 2 {Cl}_{(g)}$ under the above conditions is x × 10^–1. The value of x is:
1. 4
2. 8
3. 5
4. 10

116.

The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0 ^oC is:
1. 10.52 cal/(mol K)
2. 21.04 cal/(mol K)
3. 5.260 cal/(mol K)
4. 0.526 cal/(mol K)

117.

Assertion (A):	The heat absorbed during the isothermal expansion of an ideal gas against a vacuum is zero.
Reason (R):	The volume occupied by the molecules of an ideal gas is zero.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

118.

Consider the following reaction :
$a\mathrm{Cu}+b\mathrm{HNO}_{3} \rightarrow c\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+d\mathrm{NO}+e\mathrm{H}_{2} \mathrm{O}$
The values of a, b, and e in the reaction are, respectively:
1. 3, 8 and 4
2. 5, 2 and 8
3. 5, 2 and 16
4. 2, 5 and 8

119. Four gases $O_2 ,~CO_2,~N_2 $ and $NH_3$ have the critical temperatures (all in K) 154, 304, 126, 406 respectively. The correct order for the magnitude of intermolecular forces is:
1. $N_2 < O_2 < CO_2 < NH_3 $
2. $N_2 < O_2 < NH_3 <CO_2$
3. $NH_3 < CO_2 <O_2 < N_2$
4. $CO_2 < O_2 < NH_3 < N_2$

120.

In the following reactions, which substances are acting as oxidising agents?

C (s) + O_{2} (g) \to {CO}_{2} (g)

2 {Fe}^{3 +} (aq) + 2 l^{-} (aq) \to {Fe}^{2 +} (aq) + l_{2} (aq)

Mg (s) + 2 H^{+} (aq) \to {Mg}^{2 +} (aq) + H_{2} (g)

1. $C (s), {Fe}^{3 +} (aq), H^{+} (aq)$
2. $C (s), {Fe}^{3 +} (aq), Mg (s)$
3. $O_{2} (g), l^{-} (aq), H^{+} (aq)$
4. $O_{2} (g), {Fe}^{3 +} (aq), H^{+} (aq)$

121. Which of the following compounds does not act as an oxidising agent?
1. $SO_2$
2. $HCl$
3. $KMnO_4$
4. $MnO_2 $

122. Match List I with List II:

List I Law	List II Formula
A. Charle's Law	I. P/T = Constant
B. Gay Lussac's Law	II. PV = Constant
C. Boyle's Law	III. V/n = Constant
D. Avagadro's Law	IV. V/T = Constant

Choose the correct answer from the options given below:
1. A - (II); B - (I); C - (IV); D - (III)
2. A - (II); B - (IV); C - (III); D - (I)
3. A - (IV); B - (I); C - (II); D - (III)
4. A - (IV); B - (III); C - (II); D - (I)

123.

The exothermic formation of ClF₃ is represented by the equation:
${Cl}_{2} (g) + 3 F_{2} (g) ⇌ 2 {ClF}_{3} (g); ∆ Hr = - 329 kJ$
Which of the following will increase the quantity of ClF₃ is an equilibrium mixture of Cl₂, F₂, and ClF₃?
1. Adding F₂
2. Increasing the volume of the container
3. Removing Cl₂
4. Increasing the temperature

124.

Which one of the following statements is not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?
1. The area under the distribution curve remains the same as under the lower temperature
2. The distribution becomes broader
3. The fraction of the molecules with the most probable speed increases
4. The most probable speed increases

125.

A car tyre is filled with nitrogen gas at 35 psi at 27 °C. It will burst if pressure exceeds 40 psi. The temperature in °C at which the car tyre will burst is-
(Rounded-off to the nearest integer)
(Hint: psi is unit of pressure)
1. 65
2. 70
3. 75
4. 77

126.

What is the oxidation number of Cl in $\text{CaOCl}_2$ (bleaching powder)?

1. Zero, because it contains Cl₂
2. -1, because it contains Cl^-
3. +1, because it contains ClO^-
4. +1 and -1 because it contains ClO^- and Cl^-

127.

Among the following, the graph not correctly representing an ideal gas is:

d = Density , P = Pressure, T = Temperature
1. II
2. III
3. I
4. IV

128. A precipitate of AgCl is formed when equal volumes of the following are mixed: (Ksp for AgCl = 10^–10)
1. 10^–4 M AgNO₃ and 10^–7 M HCl
2. 10^–5 M AgNO₃ and 10^–6 M HCl
3. 10^–5 M AgNO₃ and 10^–4 M HCl
4. 10^–6 M AgNO₃ and 10^–6 M HCl

129.

Which of the following reactions is an example of a redox reaction?
1.   $XeF_6+H_2O~\longrightarrow~XeOF_4+2HF$
2.   $XeF_6+2H_2O~\longrightarrow~XeO_2F_2+4HF$
3. $XeF_4+O_2F_2~\longrightarrow~XeF_6+O_2$
4.   $XeF_2+PF_5~\longrightarrow~[XeF]^{+1}+PF_6~^-$

130.

An aqueous solution of NaOH has a concentration of 0.01 mol/L.
Calculate the pH of the NaOH solution at 25 °C.
Given the ionic product of water is K_w = [H⁺] [OH^–] = 10^–14 mol²/L² (at 25 °C)
1. 11
2. 7
3. 14
4. 12

131. For which of the following equations, $\Delta H > \Delta E $?
$1.~~\mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_{3}(\mathrm{g})\\ \\ 2.~~\mathrm{H}_{2}(g)+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\\ \\ 3.~~\mathrm{PCl}_{5}(g) \rightarrow \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g)\\ 4.~~\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{HI}(\mathrm{g}) $

132. Which of the following is an incorrect statement?

1.	Molar heat capacity is an intensive property.
2.	$\Delta S > 0 $ for an isolated system $(\Delta U = 0 )$
3.	A bomb calorimeter is used to measure the heat absorbed at a constant volume.
4.	Pressure, volume and work done on the system are state functions.

133. For maximum work in a closed system, the process must be:
1. Irreversible
2. Reversible
3. Adiabatic
4. None of the above

134.

The compound that does not act as Lewis acid is:
1. AlCl₃
2. BF₃
3. NH₃
4. FeCl₃

135.

The internal energy change when a system goes from state A to B is 40 k J/mol . If the system goes from A to B by a reversible path and returns to state A by an irreversible path, what would be the net change in internal energy?
1. 40 kJ
2. > 40kJ
3. < 40 kJ
4. zero

Chemistry - Section B

136.

Which of the following substances will form an alkaline solution when dissolved in water?

I.	Na₂CO₃
II.	NaCl
III.	NaHSO₄

1. I, II, and III
2. I only
3. I and II only
4. II and III only

137.

Given:
$E_{Cl_{2}/Cl^{-}}^{o} = 1.36 V$
$E_{Cr^{3+}/Cr}^{o} = -0.74 V$
$E_{Cr_20_7^{2-}/Cr^{3+}}^{o} = 1.33 V$
$E_{MnO_4^{-}/Mn^{2+}}^{o} = 1.51 V$
The strongest reducing agent among the following is:

1.	Cr³⁺	2.	Cl^–
3.	Cr	4.	Mn²⁺

138.

The change in internal energy, ∆U, in kJ, when a spring undergoes compression, with 10 kJ of work performed and 2 kJ escaping as heat to the surroundings is:

1.	12	2.	–8
3.	8	4.	–12

139. Given below are two statements:

Statement I:	The spontaneous process is an irreversible process and may be reversed by some external agency.
Statement II:	A decrease in enthalpy decides the spontaneity of all processes.

In light of the above statements choose the correct answer from the options given below:

1.	Both statement I and statement II are true.
2.	Both statement I and statement II are false.
3.	Statement I is correct but statement II is false.
4.	Statement I is incorrect but statement II is true.

140.

The correct expression for the following reaction is:
Fe₂N_(s) + $\frac{3}{2}$H_2(g) $\leftrightharpoons $ 2Fe_(s) + NH_3(g)
1. $K_{c} = K_{p} (RT)$
2. $K_{c} = K_{p} {(RT)}^{- 3 / 2}$
3. $K_{c} = K_{p} {(RT)}^{- 1 / 2}$
4. $K_{c} = K_{p} {(RT)}^{1 / 2}$

141.

A mixture of one mole of H₂, He, and O₂ each are enclosed in a cylinder of volume V at temperature T. If the partial pressure of H₂ is 2 atm, the total pressure of the gases in the cylinder is-
1. 14 atm
2. 22 atm
3. 38 atm
4. 6 atm

142. The oxidizing power of chlorine in an aqueous solution can be determined by the following parameters:
$\small{\frac{1}{2} \left(Cl\right)_{2} \left(g\right) \overset{\frac{1}{2} \left(\Delta\right)_{diss} H^{\Theta}}{\rightarrow} Cl \left(g\right) \overset{\left(\Delta\right)_{eg} H^{\Theta}}{\rightarrow} \left(Cl\right)^{-} \left(g\right) \overset{\left(\Delta\right)_{hyd} H^{\Theta}}{\rightarrow} \left(Cl\right)^{-} \left(aq\right)}$
The energy involved in the conversion of ${ 1 \over 2}Cl_2(g)$ to $Cl^-$(aq) will be:
Use the following data:
$\Delta_{\text {diss }} H^{\circ}\left(\mathrm{Cl}_2\right)=240 \mathrm{~kJ} \mathrm{~mol}^{-1}$
$\Delta_{\mathrm{eg}} H^{\circ}(\mathrm{Cl})=-349 \mathrm{~kJ} \mathrm{~mol}^{-1}$ $\Delta_{\mathrm{hyd}} H^{\circ}\left(\mathrm{Cl}^{-}\right)=-381 \mathrm{~kJ} \mathrm{~mol}^{-1}$

1.	- 610 kJ mol^-1	2.	- 850 kJ mol^-1
3.	+120 kJ mol^-1	4.	+152 kJ mol^-1

143.

AB₃ (g) dissociates as AB₃(g) ⇌ AB₂(g) + $\frac{1}{2}$ B₂(g) .When the initial pressure of AB₃ is 800 torr and the total pressure developed at equilibrium is 900 torr. What fraction of AB₃(g) gets dissociated?
1. 10%
2. 12.5%
3. 25%
4. 30%

144. Given below are two statements:

Statement I:	Equilibrium can be established for a chemical reaction only.
Statement II:	The reaction may be fast or slow depending on the experimental conditions and the nature of the reactants.

In light of the above statements, choose the correct answer from the options given below:

1.	Both Statement I and Statement II are correct.
2.	Both Statement I and Statement II are incorrect.
3.	Statement I is correct and Statement II is incorrect.
4.	Statement I is incorrect and Statement II is correct.

145. Some compounds of chlorine are given:
Cl₂O, KCl, KClO, KClO₃, KClO₄, Cl₂O₇
Which one of the following options correctly lists the oxidation states of chlorine that are shown in these compounds?
1. –1, +1, +5, and +7 only
2. –1, 0, and +1 only
3. –1, 0, +1, +5, and +7 only
4. –1, +1, +3, +5, and +7 only

146.

If the oxidation numbers of A, B, and C are + 2, +5, and –2 respectively, then the possible formula of the compound is:

1.	A₂(BC₂)₂	2.	A₃(BC₄)₂
3.	A₂(BC₃)₂	4.	A₃(B₂C)₂

147. Assertion: Greater the value of Vander Waal’s constant 'a' greater the liquefaction of gas.
Reason: 'a' indirectly measures the magnitude of attractive forces between the molecules.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.

148.

A pressure cooker reduces cooking time for food because:
1. Heat is more evenly distributed in the cooking space
2. Boiling point of water involved in cooking is increased
3. The higher pressure inside the cooker crushes the food material
4. Cooking involves chemical changes helped by a rise in temperature

149.

For one mole of an ideal gas, which of these statements must be true?
(I) U and H each depend only on temperature.
(II) Compressibility factor z is not equal to 1.
(III) C_{P, m} – C_{V, m} = R
(IV) dU = C_VdT for any process.
1. (I), (III) and (IV)
2. (II), (III) and (IV)
3. (III) and (IV)
4. (I) and (III)

150. The pH of a buffer solution formed by mixing 25 mL of 0.2 M NH₄Cl and 50 mL of 0.1M of NH₃ solution at 25°C is:
(Given: $pK_b (NH_3)$ = 4.75))
1. 4.75
2. 4.45
3. 5.05
4. 9.25

Physics - Section A

151. If two identically shaped rods are joined end to end and compressive forces are applied to the system, the compressive strain will be:

1.	larger in the rod with a larger Young's modulus
2.	larger in the rod with a smaller Young's modulus
3.	equal in both the rods
4.	negative in the rod with a smaller Young's modulus

152. A stone of density $5.20~\text{g/cm}^3$ and a volume of $200~\text{cm}^3$ is fully submerged in a liquid of density $1.20~\text{g/cm}^3.$ What is the magnitude of the upthrust acting on the stone?
(Given: gravitational field strength $=10.0~\text{N/kg}$ )
1. $6.40~\text N$
2. $2.00~\text N$
3. $10.4~\text N$
4. $2.40~\text N$

153. The density of water at the surface of the ocean is $\rho$ and atmospheric pressure is $P_{0}.$ If the bulk modulus of water is $B,$ what is the density of ocean water at the depth where the pressure is $5P_{0}$?
1. $\dfrac{\rho B}{ 5P_0}$
2. $\dfrac{\rho B}{ 4P_0}$
3. $\dfrac{\rho B} {(B-4P_0)}$
4. $\dfrac{\rho B} {(B-5P_0)}$

154. A wire of natural length $L$ and cross-sectional area $A$ is made of a material of Young’s modulus $Y.$ If the wire is stretched by an amount $x,$ the energy stored in the wire is:

1.	$ \dfrac{Y A x^{2}}{L}$	2.	$ \dfrac{Y A x^{2}}{2 L}$
3.	$\dfrac{2 Y A x^{2}}{L}$	4.	$\dfrac{Y A x^{2}}{L^{2}}$

155.

The stress-strain curves are drawn for two different materials $X$ and $Y.$ It is observed that the ultimate strength point and the fracture point are close to each other for material $X$ but are far apart for material $Y.$ We can say that the materials $X$ and $Y$ are likely to be (respectively):

1.	ductile and brittle
2.	brittle and ductile
3.	brittle and plastic
4.	plastic and ductile

156. A body cools from $52^\circ \text{C}$ to $48^\circ \text{C}$ in $6$ minutes. How much time will the same body take to cool from $53^\circ \text{C}$ to $47^\circ \text{C}?$ Assume cooling is linear with time.
1. $12$ minutes
2. $9$ minutes
3. $8$ minutes
4. $7$ minutes

157.

In the making of an alloy, a metal of density $n_1$ and another metal of density $n_2$ are used. If the masses of the two metals used are $m_1$ and $m_2$ respectively, then the density of the alloy is:
1. $ \left(\frac{\mathrm{m}_1+\mathrm{m}_2}{\mathrm{n}_1+\mathrm{n}_2}\right) $
2. $ \frac{\mathrm{m}_1+\mathrm{m}_2}{\left(\frac{\mathrm{m}_1}{\mathrm{n}_1}+\frac{\mathrm{m}_2}{\mathrm{n}_2}\right)}$
3. $ \frac{\mathrm{m}_1+\mathrm{m}_2}{\left(\frac{\mathrm{m}_1+\mathrm{m}_2}{\mathrm{n}_2+\mathrm{n}_1}\right)} $
4. $ \left(\frac{\mathrm{n}_1+\mathrm{n}_2}{2}\right) $

158. A square aluminium (shear modulus is $25\times10^{9}~\text{Nm}^{-2}$) slab of side $60~\text{cm}$ and thickness of $15~\text{cm}$ is subjected to a shearing force (on its narrow face) of $18.0\times10^{4}~\text {N}.$ The lower edge is riveted to the floor. The displacement of the upper edge is:
1. $30~\mu \text m$
2. $48~\mu \text m$
3. $16~\mu \text m$
4. $64~\mu \text m$

159. A horizontal pipe is shown in the figure. The velocity of water at point $A$ is $20$ cm/s, and at point $B,$ it is $30$ cm/s. Given that the density of water is $1000$ kg/m³. The pressure difference between points $A$ and $B$ is:

1.	$50$ Pa	2.	$40$ Pa
3.	$25$ Pa	4.	$0.5$ Pa

160.

A cube floats both in water and in a liquid of specific gravity of $0.8$. Therefore,

a.	the apparent weight of the cube is the same in water and in liquid.
b.	the cube has displaced an equal volume of water and liquid while floating.
c.	the cube has displaced an equal weight of water and liquid while floating.
d.	if some weights are placed on the top surface of the cube to make it just sink, the load in case of water will be $0.8$ times of that to be used in case of liquid.

1.	(a) and (c) both are correct.
2.	only (d) is correct.
3.	(a) and (b) both are correct.
4.	(a), (b), and (c) are correct.

161.

The cylindrical tube of a spray pump has a radius $R,$ one end of which has $n$ fine holes, each of radius $r.$ If the speed of the liquid in the tube is $v,$ the speed of the ejection of the liquid through the holes is:

1.	$\dfrac{vR^{2}}{n^{2}r^{2}}$	2.	$\dfrac{vR^{2}}{nr^{2}}$
3.	$\dfrac{vR^{2}}{n^{3}r^{2}}$	4.	$\dfrac{v^{2}R}{nr}$

162.

A fluid of density $\rho~$is flowing in a pipe of varying cross-sectional area as shown in the figure. Bernoulli's equation for the motion becomes:

1. $p+\dfrac12\rho v^2+\rho gh\text{ = constant}$
2. $p+\dfrac12\rho v^2\text{ = constant}$
3. $\dfrac12\rho v^2+\rho gh\text{ = constant}$
4. $p+\rho gh\text{ = constant}$

163. A boat carrying a number of large stones is floating in a water tank. What will happen to the water level if the stones are unloaded into the water?

1.	the water level remains unchanged.
2.	the water level falls.
3.	the water level rises.
4.	the water level rises till half the number of stones are unloaded and then begins to fall.

164. The elastic behaviour of a material for linear stress and linear strain is captured in the graph below. The energy density, for a linear strain of $5 \times 10^{-4} $ is:
$($assume that the material is elastic up to the linear strain of $5 \times 10^{-4})$

1.	$15$ kJ/m³	2.	$20$ kJ/m³
3.	$25$ kJ/m³	4.	$30$ kJ/m³

165.

The density of ocean water varies with depth. This is due to:
1. elasticity
2. viscosity
3. surface tension
4. all of the above

166. A wire of length $l,$ area of cross-section $A,$ and Young's modulus of elasticity $Y$ is stretched by a longitudinal force $F.$ The change in length is $\Delta l.$ Match the following two columns.

	Column-I		Column-II
(a)	$F$ is increased	(p)	$\Delta l$ will increase
(b)	$l$ is increased	(q)	stress will increase
(c)	$A$ is increased	(r)	$\Delta l$ will decrease
(d)	$Y$ is increased	(s)	stress will decrease

1.	(a)-r, (b)-p,q, (c)-r, (d)-s
2.	(a)-p,q, (b)-p, (c)-r,s (d)-r
3.	(a)-p, (b)-r, (c)-s, (d)-p
4.	(a)-r, (b)-s, (c)-p,q, (d)-p

167.

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is held at a temperature of $100^\circ \text{C}$ while the other one is kept at $0^\circ \text{C}.$ If the two are brought into contact, assuming no heat loss to the environment, the ﬁnal temperature that they will reach is:

1.	$100^\circ \text{C}$	2.	less than $50^\circ \text{C}$
3.	more than $50^\circ \text{C}$	4.	$0^\circ \text{C}$

168. Poisson's ratio of a material is $0.5.$ If the force is applied to a wire of this material, decrement in cross-sectional area of the wire is $4\text{%}.$ The percentage increase in its length is:
1. $1\text{%}$
2. $2\text{%}$
3. $2.5\text{%}$
4. $4\text{%}$

169.

We sit in the room with the windows open. Then:

1.	the air pressure on the floor of the room equals the atmospheric pressure but the air pressure on the ceiling is negligible.
2.	the air pressure is nearly the same on the floor, the walls, and the ceiling.
3.	the air pressure on the floor equals the weight of the air column inside the room (from floor to ceiling) per unit area.
4.	the air pressure on the walls is zero since the weight of air acts downward.

170. In a vertical capillary of height $h,$ water rises upto complete height $h.$ If the capillary is tilted at $30^\circ$ horizontally, then the length of the water column inside the capillary becomes:
1. $h$
2. $h \over 2$
3. $h \over \sqrt 2$
4. $\sqrt 3 h \over 2$

171. Water on the surface of a river $10$ m deep is observed to be flowing at $5$ m/s. The shearing stress between horizontal layers of the river is:
($\eta=10^{-3}$ SI units)
1. $10^{-3}$N/m²
2. $0.8 \times 10^{-3}$ N/m²
3. $0.5 \times 10^{-3}$ N/m²
4. $1$ N/m²

172. The radius of a soap bubble is $R.$ The surface tension of the soap solution is $T,$ if the radius of the soap bubble is increased to $3R$ then the energy required is:
(consider no loss anywhere)
1. $64\pi R^{2}T$
2. $9\pi R^{2}T$
3. $32\pi R^{2}T$
4. $72\pi R^{2}T$

173. A small spherical ball of radius $0.1~\text{mm}$ and density $10^{4}~\text{kg-m}^{-3}$falls freely under gravity through a distance of $h$ before entering a tank of water. If after entering the water, the velocity of the ball does not change and it continues to fall with the same constant velocity inside the water, then the value of $h$ will be:
(given $g=10~\text{m/s}^2,$ the viscosity of water $=1.0\times10^{-5}~\text{N-sm}^{-2}$ )
1. $15~\text m$
2. $25~\text m$
3. $20~\text m$
4. $10~\text m$

174. In a surface tension experiment with a capillary tube, the water rises up to height $h.$ Choose the correct statement from the following options:

1.	In a lift moving upward with acceleration, height is less than $h.$
2.	In a lift moving downward with acceleration, height is more than $h.$
3.	On the surface of the moon with acceleration $ (\leq g),$ the height is more than $h.$
4.	All of the above are correct.

175. Two bodies $A$ and $B$ have emissivities of $e_{A}$and $e_{B}$ respectively. The outer surface areas of two bodies are equal. The two bodies emit total radiant power at the same rate. The ratio of wavelength of $B$ corresponding to maximum spectral radiancy to that of wavelength of $A$ corresponding to maximum spectral radiancy is:

1.	$\left(\dfrac{e_B}{e_A}\right)^4$	2.	$\left(\dfrac{e_A}{e_B}\right)^{1\over 2}$
3.	$\left(\dfrac{e_B}{e_A}\right)^{1\over 4}$	4.	$\left(\dfrac{e_A}{e_B}\right)^{1\over 4}$

176.

A block of iron at $100^\circ \text{C}$ is transferred to a plastic cup containing water at $20^\circ \text{C}.$ Which one of the following is not necessary in order to find the specific heat capacity of iron?

1.	Specific heat capacity of water
2.	Mass of the block of iron
3.	Thermal conductivity of the iron
4.	Final temperature

177. The force required to stretch a wire of cross-section $1$ cm²to double its length will be:
(Given Young’s modulus of the wire $=2\times10^{11}$ N/m²)
1. $1\times10^{7}$ N
2. $1.5\times10^{7}$ N
3. $2\times10^{7}$ N
4. $2.5\times10^{7}$N

178. A tall tank filled with water has an irregular shape as shown. The wall $CD$ makes an angle of

$45^\circ$ with the horizontal; the wall $AB$ is normal to the base $BC$. The lengths of $AB$ and $CD$ are much smaller than the height $h$ of water (figure not to scale).

Let

$P_{1},$ $P_{2}$ and $P_{3}$ be the pressures exerted by the water on the wall $AB$, base $BC$, and the wall $CD$ respectively. The density of water is $\rho$ and $g$ is the acceleration due to gravity. Then, approximately:

1.	$P_{1}=P_{2}=P_{3}$
2.	$P_{1}=0,P_{3}=\frac{1}{\sqrt{2}}P_{2}$
3.	$P_{1}=P_{3}=\frac{1}{\sqrt{2}}P_{2}$
4.	$P_{1}=P_{3}=0,=P_{2}=h\rho g$

179. The area of cross-section of the rope used to lift a load by a crane is $2.5\times10^{-4}~\text{m}^2.$ The maximum lifting capacity of the crane is $10~\text{metric tons}.$ To increase the lifting capacity of the crane to $25~\text{metric tons},$ the required area of the cross-section of the rope should be: (Take $g=10~\text{ms}^{-2}$ )
1. $6.25\times10^{-4}~\text{m}^2$
2. $10\times10^{-4}~\text{m}^2$
3. $1\times10^{-4}~\text{m}^2$
4. $1.67\times10^{-4}~\text{m}^2$

180. A metal wire of length $0.5$ m and cross-sectional area $10^{-4}$ m² has breaking stress $5\times10^{8}$Nm^–2. A block of $10$ kg is attached at one end of the string and is rotating in a horizontal circle. The maximum linear velocity of the block will be:
1. $15$ m/s
2. $50$ m/s
3. $25$ m/s
4. $40$ m/s

181. The shapes of the black body radiation curves depend on their:
1. Masses
2. Surface areas
3. Materials
4. Temperatures

182. The terminal velocity of a ball of radius $2$ mm falling through an oil tank of viscosity $1~\text{kg}\text-\text{m}^{-1} \text{s}^{-1}$ is $6$ cm/s. What is the viscous drag force acting on the ball?
1. $2.26\times 10^{-4}$ N
2. $2.26\times 10^{-3}$ N
3. $2.26\times 10^{-2}$ N
4. $2.26\times 10^{-1}$ N

183.

A solid expands upon heating because:

1.	the potential energy of interaction between atoms in the solid is asymmetric about the equilibrium positions of atoms.
2.	the frequency of vibration of the atoms increases.
3.	the heating generates a thermal gradient between opposite sides.
4.	a fluid called the caloric* flows into the interatomic spacing of the solid during heating thereby expanding it.

*Caloric is a hypothetical, weightless, and indestructible fluid that was once (till about $18^{\text{th}}$ century) thought to be the composition of heat.

184. Given below are two statements:

Assertion (A):	For Reynold number $R_{e}>3000,$ the flow of fluid is turbulent.
Reason (R):	Inertial forces are dominant compared to viscous forces at such high Reynold's numbers.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

185.

The temperature at which the Celsius and Fahrenheit thermometers agree (to give the same numerical value) is:

1.	$-40^\circ$	2.	$40^\circ$
3.	$0^\circ$	4.	$50^\circ$

Physics - Section B

186.

The total radiant energy per unit area, normal to the direction of incidence, received at a distance $R$ from the centre of a star of radius $r,$ whose outer surface radiates as a black body at a temperature $T$ K is given by: (Where $\sigma$ is Stefan’s constant):
1. $\dfrac{\sigma r^{2}T^{4}}{R^{2}}$
2. $\dfrac{\sigma r^{2}T^{4}}{4 \pi R^{2}}$
3. $\dfrac{\sigma r^{2}T^{4}}{R^{4}}$
4. $\dfrac{4\pi\sigma r^{2}T^{4}}{R^{2}}$

187. When water flows out of a small hole at the bottom of a large tank of uniform cross-section, the average flow rate equals the average of the initial and the final flow rate. The time to empty the tank is $1~\text{hr},$ using a small pipe at the bottom. If the tank were to be filled to twice its previous level, the time required will be:
1. $1~\text{hr}$
2. $\sqrt2~\text{hr}$
3. $2~\text{hr}$
4. $4~\text{hr}$

188. Three rods made of the same material and having the same cross-section have been joined as shown in the figure. Each rod is of the same length. The left and right ends are kept at $0^\circ \text{C}$ and $90^\circ \text{C}$ respectively. The temperature of the junction of the three rods will be:

1.	$45^\circ \text{C}$	2.	$60^\circ \text{C}$
3.	$30^\circ \text{C}$	4.	$20^\circ \text{C}$

189. A wire of initial length $L$ and radius $r$ is stretched by a length $l.$ Another wire of the same material but with an initial length $2L$ and radius $2r$ is stretched by a length $2l.$ The ratio of the stored elastic energy per unit volume in the first wire to that in the second wire is:
1. $1:4$
2. $1:2$
3. $2:1$
4. $1:1$

190. Given below are two statements:

Statement I:	The pressure at the bottom of a vessel containing water is proportional to the height of the water.
Statement II:	When water begins to flow out of a small hole in a tank (after the hole is opened), the pressure of water inside the tank near the hole decreases.

1.	Statement I is incorrect and Statement II is correct.
2.	Both Statement I and Statement II are correct.
3.	Both Statement I and Statement II are incorrect.
4.	Statement I is correct and Statement II is incorrect.

191.

Two rods of the same length and the same area of the cross-section are joined. The temperature of the two ends is shown in the figure.

As we move along the rod, temperature varies as shown in the following figure.

Then:
1. $K_{1}>K_{2}$
2. $K_{1}=K_{2}$
3. $K_{1}<K_{2}$
4. none of these

192. The bulk modulus of a liquid is $3\times10^{10}$Nm^–2. The pressure required to reduce the volume of liquid by $2\text{%}$ is:
1. $3\times10^{8}$ Nm^–2
2. $9\times10^{8}$ Nm^–2
3. $6\times10^{8}$ Nm^–2
4. $12\times10^{8}$ Nm^–2

193.

Given below are two statements:

Assertion (A):	Hooke's law is applicable up to the elastic limit.
Reason (R):	Up to the elastic limit, stress is directly proportional to strain.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	Both (A) and (R) are False.

194. Three bodies $A,B$ and $C$ of masses $m,$ $m$ and $\sqrt{3}m$ respectively are supplied heat at a constant rate. The change in temperature $\theta$ versus time $t$ graph for $A,B$ and $C$ are shown by $\mathrm{I, II}$ and $\mathrm{III}$ respectively. If their specific heat capacities are $S_{A},$ $S_{B}$and $S_{C}$ respectively then which of the following relation is correct? (Initial temperature of the body is $0^\circ \text{C}$)

1. $S_{A}>S_{B}>S_{C}$
2. $S_{B}=S_{C}<S_{A}$
3. $S_{A}=S_{B}=S_{C}$
4. $S_{B}=S_{C}>S_{A}$

195. The bob (mass : $m$) of a simple pendulum is suspended from a long wire of length $L.$ When this bob is submerged in a fluid of density $\rho,$ it is observed by means of a careful measurement that the extension in the wire is halved. The volume of bob is:

1.	$\dfrac{m}{\rho}$	2.	$\dfrac{2m}{\rho}$
3.	$\dfrac{m}{2\rho}$	4.	$\dfrac{3m}{2\rho}$

196. A tank full of water is placed in an elevator. The elevator accelerates upward. The water pressure at the bottom of the tank:
1. decreases
2. increases
3. remains unchanged
4. first increases and then decreases

197. The surface tension of soapy water is $S.$ When bubbles are blown with soapy water, one bubble of radius $r$ is formed within another of radius $3r.$ The excess pressure within the smaller bubble, relative to the atmospheric pressure is:

1.	$\dfrac{4S}{r}$	2.	$\dfrac{8S}{3r}$
3.	$\dfrac{8S}{r}$	4.	$\dfrac{16S}{3r}$

198. A material like rubber which can be stretched to cause large strain is called:

1.	highly elastic	2.	ductile
3.	plastic	4.	elastomers

199. Air flows across the horizontal wings of an airplane in such a way that its speeds below and above the wings are $90$ m/s and $120$ m/s respectively. If the density of air is $1.3$ kg/m³, then the pressure difference across the lower and upper radii of the wings will be:

1.	$7338$ N/m²	2.	$3715$ N/m²
3.	$3220$ N/m²	4.	$4095$ N/m²

200.

What is the ratio of the temperatures $T_{1}$ and $T_{2}$ in the following graph?

1. $3:2$
2. $2:1$
3. $4:3$
4. $1:1$

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1.	Molar heat capacity is an intensive property.
2.	\(\Delta S > 0 \) for an isolated system \((\Delta U = 0 )\)
3.	A bomb calorimeter is used to measure the heat absorbed at a constant volume.
4.	Pressure, volume and work done on the system are state functions.

1.	\( \dfrac{Y A x^{2}}{L}\)	2.	\( \dfrac{Y A x^{2}}{2 L}\)
3.	\(\dfrac{2 Y A x^{2}}{L}\)	4.	\(\dfrac{Y A x^{2}}{L^{2}}\)

1.	\(\dfrac{vR^{2}}{n^{2}r^{2}}\)	2.	\(\dfrac{vR^{2}}{nr^{2}}\)
3.	\(\dfrac{vR^{2}}{n^{3}r^{2}}\)	4.	\(\dfrac{v^{2}R}{nr}\)

1.	\(15\) kJ/m³	2.	\(20\) kJ/m³
3.	\(25\) kJ/m³	4.	\(30\) kJ/m³

	Column-I		Column-II
(a)	\(F\) is increased	(p)	\(\Delta l\) will increase
(b)	\(l\) is increased	(q)	stress will increase
(c)	\(A\) is increased	(r)	\(\Delta l\) will decrease
(d)	\(Y\) is increased	(s)	stress will decrease

1.	\(100^\circ \text{C}\)	2.	less than \(50^\circ \text{C}\)
3.	more than \(50^\circ \text{C}\)	4.	\(0^\circ \text{C}\)

1.	\(\left(\dfrac{e_B}{e_A}\right)^4\)	2.	\(\left(\dfrac{e_A}{e_B}\right)^{1\over 2}\)
3.	\(\left(\dfrac{e_B}{e_A}\right)^{1\over 4}\)	4.	\(\left(\dfrac{e_A}{e_B}\right)^{1\over 4}\)

1.	\(P_{1}=P_{2}=P_{3}\)
2.	\(P_{1}=0,P_{3}=\frac{1}{\sqrt{2}}P_{2}\)
3.	\(P_{1}=P_{3}=\frac{1}{\sqrt{2}}P_{2}\)
4.	\(P_{1}=P_{3}=0,=P_{2}=h\rho g\)

Assertion (A):	For Reynold number \(R_{e}>3000,\) the flow of fluid is turbulent.
Reason (R):	Inertial forces are dominant compared to viscous forces at such high Reynold's numbers.

1.	\(45^\circ \text{C}\)	2.	\(60^\circ \text{C}\)
3.	\(30^\circ \text{C}\)	4.	\(20^\circ \text{C}\)

1.	\(\dfrac{m}{\rho}\)	2.	\(\dfrac{2m}{\rho}\)
3.	\(\dfrac{m}{2\rho}\)	4.	\(\dfrac{3m}{2\rho}\)

1.	\(\dfrac{4S}{r}\)	2.	\(\dfrac{8S}{3r}\)
3.	\(\dfrac{8S}{r}\)	4.	\(\dfrac{16S}{3r}\)

1.	\(7338\) N/m²	2.	\(3715\) N/m²
3.	\(3220\) N/m²	4.	\(4095\) N/m²

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