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When generic name is repeated in specific
name of a plant it is called:
1. Synonym
2. Autonym
3. Tautonym
4. None above

Common cold is not cured by antibiotics
because it is
1. caused by a Gram-negaive bacterium
2. not an infectious disease
3. viral disease
4. caused by a Gram-positive bacterium

Which one of the following statements about
mycoplasma is wrong?
1. They are pleomorphic
2. They are sensitive to Penicillin
3. They cause diseases in plants
4. They are called PPLO

In the following diagram A, B, C and D
represent

1. A - Seta, B - Leaves, C- Rhizoids, D - Capsule
2. A - Leaf, B - Rhizoids, C- Scales, D - Root hair
3. A - Capsule, B - Seta, C- Leaves, D - Rhizoids
4. A - Capsule, B - Foot, C- Leaves, D - Rhizoids

The incorrect match for chlorophyll type is
1. Chlorophyll ‘a’ .... Green algae
2. Chlorophyll ‘d’ ... Diatoms
3. Chlorophyll ‘c’ ... Dinoflagellates and Brown algae
4. Chlorophyll ‘d’ ...Red algae

Lichens are pioneer vegetation in
1. Xerosere
2. Hydroponics
3. Marine life
4. Hydrosere

Protonema is a characteristic feature of
1. Fern
2. Marchantia
3. Moss
4. Cycas

In Pteridophytes reduction division occurs
during
1. spore formation
2. gamete formation
3. sporophyte formation
4. gametophyte germination

Endosperm in gymnosperm is
1. Haploid
2. Diploid
3. Triploid
4. All of the above

Match items in column I with those in column II
Column I                                         Column II
A. Coralloid roots                              1. Cycas
B. Monoxylic wood                            2. Mass of seeds  dispersed
C. Schizogenous canals                     3. Single cambium ring
D. Sulphur shower                            4. Stores resin
                                                       5. Mass of pollen
    A   B   C   D
1. 1   3   5   4
2. 1   2   4   5
3. 3   4   1   5
4. 1   3   4   5

Sweet potato is a modified
1. Rhizoid
2. Stem
3. Adventitious Root
4. Leaf

The diagram given below belongs to -

Syngenecious condition means
1. anthers fused filaments free
2. both anthers and filaments fused
3. filaments fused and anthers free
4. filaments fused with carpels

Consider the following four statements A, B, C and D and select the right option for two correct statements.
(A) In vexillary aestivation, the large posterior petal is called standard, two lateral ones
are wings and two small anterior petals are termed keel
(B) The floral formula for Liliaceae is 
(C) In pea flower the stamens are monadelphous
(D) The floral formula for Solanaceae is 
The correct statements are
1. (A) and (C)
2. (A) and (B)
3. (B) and (C)
4. (C) and (D)

Placentations given below in the diagrams are

1. a - Basal, b- Axile, c- Free central, d - Parietal
2. a - Marginal, b- Axile, c- Basal, d - Superfecial
3. a - Marginal, b- Free central, c- Basal, d - Axile
4. a - Marginal, b- Axile, c- Parietal, d - Free central

What type of influrescence is found in Ficus?
1. Cyathium
2. Umbel
3. Hypanthodium
4. Racemose

Coir of coconut is obtained from
1. Endocarp
2. Mesocarp
3. Pericarp
4. Placenta

The fruit of wheat is a
1. Nut
2. Caryopsis
3. Pome
4. Cypsella

Collenchyma differs from sclerenchyma in
1. retaining protoplasm at maturity
2. having thick walls
3. having crystals inside lumen
4. being dead

The ballon like growth of parenchyma in the
lumen of a vessel, is called
1. Phellogen
2. Histogen
3. Tyloses
4. Tunica

Hypodermis in dicot stem is composed of
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Both 1. and 3.

Osmotic pressure of a solution is
1. more than that of pure solvent
2. less than that of pure solvent
3. variable depending upon concentration
4. equal to that of pure solvent

Wilting occurs, when there is
1. higher relative humidity of atmosphere
2. absorption higher than transpiration
3. transpiration higher than absorption
4. excess root pressure

Which one of the following elements in plants
is not remobilized?
1. Calcium
2. Potassium
3. Zinc
4. Phosphorus

Manganese is required in
1. Nucleic acid synthesis
2. Plant cell wall formation
3. Photolysis of water during photosynthesis
4. Chlorophyll synthesis

Micronutrients are
1. less important than macronutrients
2. as important as macronutrients
3. having a minor role in plant nutrition
4. omitted from culture medium without any
detrimental effect

Which of the following statement is false?
1. Algae have most highly evolved gametophyte
where as angiosperms have reduced
gametophyte.
2. Sporic meiosis occurs in Bryophytes.
3. Cryptogams shows siphonogamous fertilization.
4. Bryophytes are the first embryophytes.

An artificial group within fungi is
1. Ascomycetes
2. Deuteromycetes
3. Basidiomycetes
4. Phycomycetes

Following plants belong to how many families.
Cajanus, Glycine, Alliun, Phaseolus, Arachis,
Dalbergia, Cicer, Colchicum, Dracaena
1. Two
2. Three
3. Four
4. Five

Boron in green plants assists in
1. activation of enzymes
2. acting as enzyme cofactor
3. photosynthesis
4. sugar transport

Complete girdling ultimately kills the tree due
to
1. stoppage of photosynthesis
2. starvation of root
3. non-movement of minerals
4. nonmovement of water

The continuous excretion of watery substance
from stump of a well-watered potted plant after
cutting off the shoot slightly above the base is
due to
1. root pressure
2. guttation
3. transpiration
4. imbibitions

Which one of the following elements is not an
essential micronutrient for plant growth?
1. Manganese
2. Zinc
3. Copper
4. Calcium

In which of the following option name is written
correctly?
1. APIS INDICA
2. Trypansoma Gambiense
3. Ficus begalensis
4. Mangifera indica

Which of the following is a disease caused by
prion?
1. Kala-azar
2. Parkinson’s disease
3. Creutzfeldt-Jacob disease
4. Gas gangrene

Phenetic classification of organisms is based
on
1. Observable characteristics of existing organisms
2. The ancestral lineage of existing organisms
3. Dendrogram based on DNA characteristics
4. Sexual characteristics

Ergot, which is an important source of a drug
is obtained from
1. Agaricus
2. Claviceps
3. Atropa
4. Ephedra

The edible part of orange is
1. Juicy aril
2. Juicy placental hair
3. Mesocarp
4. Endocarp

A free living aerobic soil bacterium capable of
fixing nitrogen is
1. Azotobacter
2. Clostridium
3. Rhizobium
4. Streptococcus

White rust of crucifers is caused by
1. Phytophthora
2. Albugo
3. Ustilago
4. Puccinia

In a longitudinal section of a root, starting from
the tip upward, the four zones occur in the
following order
1. Cell division, cell maturation, cell enlargement,
root cap
2. Root cap, cell division, cell maturation, cell
enlargement
3. Root cap, cell division, cell enlargement, cell
maturation
4. Cell division, cell enlargement, cell maturation,
root cap

Edible part of mango is
1. Mesocarp
2. Endocarp
3. Receptacle
4. Epicarp

Water cavity is associated with
1. Xylem of Helianthus stem
2. Xylem of Helianthus root
3. Xylem of Zea root
4. Xylem of Zea stem

Pneumatophores are not found in
1. Rhizophora
2. Heritiera
3. Bombax
4. Sonneratia

Which of the following statement is correct?
1. Legumes may fix nitrogen independently of the
specialized bacteria that live in their roots
2. Legumes are incapable of fixing nitrogen
3. Legumes fix nitrogen only through the
specialized bacteria that live in their roots
4. Legumes fix nitrogen only through specialized
bacteria that live in their leaves

Vertbrates and sea stars may seem as different as
two animal groups can be, yet they share
1. the same type of body symmetry as adults
2. a high degree of cephalization
3. certain developmental features, including the
type of coelom formation
4. an endoskeleton that includes a cranium

A land snail, a clam, and an octopus all share
1. a mantle
2. calcareous shell
3. a radula
4. distinct cephalization

Which of the following combinations of phylum and description is incorrect?

Which of the following is not descriptive of
deuterostomes ?
1. radial cleavage
2. includes humans
3. formation of the coelom from outpocketings of
archenteron
4. development of a blastopore into a mouth

Which of the following structures or substances is
incorrectly paired with a tissue ?
1. Haversian system—bone
2. platelets—blood
3. fibroblasts—skeletal muscle
4. chondroitin sulfate—cartilage

If you were to sprint 100 m a few hours after lunch,
which stored fuel would you probably tap?
1. muscle proteins
2. fats stored in adipose tissue
3. muslce glycogen
4. blood proteins

Which of the following reactions prevails in red blood
cells traveling through pulmonary capillaries?
(Hb=hemoglobin)

1. $\mathrm{Hb}+4{\mathrm{O}}_2\to \mathrm{Hb}{\left({\mathrm{O}}_2\right)}_4$
2. $\mathrm{Hb}\left({\mathrm{O}}_2\right)\to \mathrm{Hb}+4{\mathrm{O}}_2$
3. ${\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}_2{\mathrm{CO}}_3$
4. ${\mathrm{H}}_2{\mathrm{CO}}_3\to {\mathrm{H}}^{+}{\mathrm{HCO}}_3^{-}$

A decrease in the pH of human blood caused by
exercise would
1. decrease breathing rate
2. increase heart rate
3. decrease the amount of O₂ unloaded from
hemoglobin
4. decrease cardiac output

The majority of water and salt filtered into Bowman’s capsule is reabsorbed by:
1. the brush border of the transport epithelia of the proximal tubule
2. diffusion from the descending limb of the loop of Henle into the hypertonic interstitial fluid of the medulla
3. active transport across the transport epithelium of the thick upper segment of the ascending limb of the loop of Henle
4. selective secretion and diffusion across the distal tubule

The key difference between an ectotherm and an
endotherm is that
1. ectotherms generate energy mainly from
fermentation; endotherms mainly from cellular
respiration
2. ectotherms are mostly aquatic animals;
endotherms are mostly terrestrial
3. ectotherms warm their bodies mainly by
absorbing environmental heat; endotherms
mainly use metabolic heat to warm their bodies
4. ectotherms are “cold-blooded: animals with body
temperatures that cannot reach the high body
temperatures of endotherms

A major difference in the mechanism of action between
steroid and peptide hormones is that
1. steroid hormones mainly affect the synthesis of
proteins, whereas peptide hormones mainly
affect the activity of proteins already in the cell
2. target cells react more rapidly to steroid
hormones than they do to peptide hormones
3. steroid hormones enter the nucleus, whereas
peptide hormones stay in the cytoplasm
4. steroid hormones bind to a receptor protein,
whereas peptide hormones bind to G protein

Which of the following hormones is incorrectly paired with its action?
1. oxytocin–stimulates uterine contractions during childbirth
2. thyroxine–stimulates metabolic processes
3. insulin–stimulates glycogen breakdown in the liver
4. ACTH–stimulates the release of glucocorticoids by the adrenal cortex

An example of antagonistic hormones controlling
homeostatis is
1. thyroxine and parathyroid hormone in calcium
balance
2. insulin and glucagon in glucose metabolism
3. progestins and estrogens in sexual differentiation
4. epinephrine and norepinephrine in fight-or-flight
responses

Action potentials are usually propagated in only one
direction along an axon because
1. the nodes of Ranvier conduct only in one
direction
2. the brief refractory period prevents depolarization
in the direction from which the impulse came
3. the axon hillock has a higher membrane potential
than the tips of the axon
4. ions can flow along the axon only in one direction

The depolarization of the presynaptic membrane of
an axon directly causes
1. voltage-gated calcium channels in the membrane
to open
2. synaptic vesicles to fuse with the membrane
3. an action potential in the postsynaptic cell
4. the opening of chemically sensitive gates that
allow neurotransmitter to spill into the synaptic
cleft

Gray matter is
1. made up of three protective layers called
meninges
2. located on the outside of the spinal cord
3. restricted to the brain
4. populated by cell bodies of neurons

Which of the following structures or regions is
incorrectly paired with its function?
1. limbic system—screening of information between
the spinal cord and the brain; regulates arousal
and sleep
2. medulla oblongata—homeostatic control center
3. cerebellum—unconscious coordination of
movement and balance
4. corpus callosum—band of fibers connecting left
and right cerebral hemispheres

Receptor sites for neurotransmitters are located on the:
1. tips of axons
2. axon membranes in the regions of the nodes of Ranvier
3. postsynaptic membrane
4. presynaptic membrane

The role of calcium in muscle contraction is
1. to break the cross-bridges as a cofactor in the
hydrolysis of ATP
2. to bind with troponin, changing its shape so that
the actin filament is exposed
3. to transmit the action potential across the
neuromuscular junction
4. to spread the action potential through the T
tubules

The utricle and saccule are
1. involved in laterial integration of visual signals
2. visual centers in the cortex
3. part of the apparatus responsible for positional
information baout the head
4. semicircular canals that respond to head rotation

Which of the following is an incorrect statement about
the vertebrate eye ?
1. The vitreous humor regulates the amount of light
entering the pupil
2. The transparent cornea is an extension of the
sclera
3. The fovea is the center of the visual field and
contains only cones
4. The ciliary muscle functions in accommodation

When you first walk from a brightly lit area into
darkness which of the following occurs?
1. The photospins in your cones become bleached
2. Your rod cells become hyperpolarized
3. Your rhodpsin is still dossociated into retinal and
opsin, and your rods are temporarily
nonfunctional
4. Lateral inhibition caused by your horizontal cells
ceases

Which of the following is a true statement about
cardiac muscle cells?
1. They lack an orderly arrangement of actin and
myosin filaments
2. They have less extensive sacroplasmic reticulum
and thus contract more slowly than smooth
muscle cells
3. They are connected by intercalated discs,
through which action potentials spread to all cells
in the heart
4. They have a resting potential more positive than
an action potential threshold

Pancreatic juice contains enzymes that can split
1. Carbohydrates, fats, proteins, vitamins
2. Proteins, fats, nucleic acids, glucose
3. Carbohydrates, fats, proteins, nucleic acids
4. Proteins, fats, vitamins, nucleic acids only

Which of the following reaction is not catalysed by
brush border enzyme?
1. $\mathrm{Dipeptides}\stackrel{\mathrm{Dipeptidases}}{\to }\mathrm{Amino}<mspace\; width="1em"></mspace>\mathrm{acids}$
2. $\mathrm{Maltose}\stackrel{\mathrm{Maltase}}{\to }\mathrm{Glucose}+\mathrm{Glucose}$ 
3. $\mathrm{Nucleotides}\stackrel{\mathrm{Nucleotidase}}{\to }\mathrm{Nucleosides}$ 
4. $\mathrm{Nucleic}<mspace\; width="1em"></mspace>\mathrm{acids}\stackrel{\mathrm{Nucleases}}{\to }\mathrm{Nucleotides}$

Given below a diagram of a section of an alveolus with a pulmonary capillary. Which of the following is a correct statement for diffusion of gases?

Breathing becomes accelerated when the person
opens his nose after holding of the breath by closing
his nose with fingers. This is due to
1. Decrease in concentration of H⁺
ions in the body
2. Carbon monoxide build up in the body
3. Decrease in carbon dioxide concentration in
arterial blood
4. Carbon dioxide build up in the body

Approximately 3 L of fluid leaves capillaries of a healthy
person each day. The lost fluid and proteins are carried
back to circulatory system by
1. Active transport through capillary wall
2. Passive diffusion through capillary wall
3. Lymphatic system
4. Villi of the small intestine

Human heart is myogenic but vagus nerve regulates
the heart beat. Which neurotransmitter is released by
this nerve to reduce heart rate?
1. GABA
2. Acetylcholine
3. Epinephrine
4. Glycine

Which of the following parts of brain regulates
movements of arms while walking and true laughter
in response to a joke?
1. Amygdala
2. Corpus striatum
3. Corpora quadrigemina
4. Hippocampal lobe

One amongst the following features of birds may not
be considered as a volant adaption
1. Presence of pneumatic endoskeleton
2. Presence of air sacs
3. Presence of Keel on sternum
4. Presence of nucleated RBCs

Leucocytes with bilobed nucleus, produced in Red
Bone marrow and anthistaminic in function are
1. Basophils
2. Eosinophils
3. Neutrophils
4. Monocytes

Given below is a figure that indicates the external
features of cockroach

Choose the option which is correct for the features of
the labelled structure A,B,C and D
 

The atrial wall of our heart secretes a very important peptide hormone called______, which_____ because
it causes dilation of the blood vessels. Choose the option which correctly fills the blank.
1. Rennin, increases the blood pressure
2. Angiotensinogen, decreases the blood pressure
3. Atrial natriuretic factor, increases the blood pressure
4. Atrial natriuretic factor, decreases the blood pressure

Which of the following statement is not correct for normal ECG?

Which of the following statements about cross-bridges
is false?
1. They are composed of myosin
2. They bind to ATP after they attach to actin
3. They contain an ATPase
4. They split ATP before they attach to actin

Peristalsis occurs
1. from the mouth to the small intestine
2. from the beginning of the esophagus to the anus
3. only in the stomach
4. only in the small and large intestines

The best explanation for the slow movement of blood
in capillaries is
1. skeletal muscles press on veins, not capillaries
2. capillaries have much thinner walls than arteries
3. there are many more capillaries than arterioles
4. venules are not prepared to receive so much
blood from the capillaries

Which of these pairs is mismatched?
1. slightly movable joint–vertebrae
2. hinge joint–hip
3. immovable joint–sutures in cranium
4. ball and socket joint–hip

Which of these sequences describes the correct path
for light rays entering the human eye?
1. sclera, retina, choroid, lens, cornea
2. fovea centralis, pupil, aqueous humor, lens
3. cornea, pupil, lens, vitreous humor, retina
4. cornea, fovea centralis, lens, choroid, rods

Our perception of pitch is dependent upon the region
of the ___vibrated and the regions of
the_____stimulated
1. cochlea, spinal cord
2. basilar membrane, spinal cord
3. basilar membrane, auditory cortex
4. cochlea, cerebellum

Which of the following physiological responses is an
example of positive feedback?
1. An increase in the concentration of glucose in
the blood stimulates the pancreas to secrete
glucago, a hormone that lowers blood glucose
concentration
2. A high concentration of carbon dioxide in the
blood causes deeper, more rapid breathing,
which expels carbon dioxide
3.  Stimulation of a nerve cell causes sodium ions
to leak into the cell, and the sodium influx triggers
the inward leaking of even more sodium
4. The body’s production of red blood cells, which
transport oxygen from the lungs to other organs,
is stimulated by a low concentration of oxygen

The nervous sytem and the endocrine system differ
in:
I. How their signals are delivered in the body
II. The speed of the body’s response to their signals
III. The use of negative feedback in controlling their
signaling
1. I, II, III
2. I and II only
3. I and III only
4. I only

The enzyme carbonic anhydrase:
I. Affects the breathing rate
II. Is found in Red blood cells
III. Is active once carbon dioxide enters the blood
IV. Attaches CO2 to hemoglobin
1. I, II, III & IV
2. II and III
3. II and IV
4. II only

Teeth of sharks are modified______while copulatory
organs of sharks are modified______
1. Epidermal scales, pectoral fins
2. Dermal scales, pelvic fins
3. Cycloid scales, caudal fins
4. Pectoral fins, pelvic fins

The first line in the Lyman series in the spectrum of hydrogen atom occurs at a wavelength of 1215 Å and the limit for Balmer series is 3645 Å. Calculate the wavelength corresponding to series limit of Lyman series.
1. 911.2 Å
2. 812.2 Å
3. 712.2 Å
4. 678.4 Å

The correct order of increasing energy of atomic orbital is: 
1. 3s, 3p, 4s, 3d, 4p
2. 3s, 3p, 3d, 4s, 4p
3. 3s, 3p, 4s, 4p, 3d
4. 3s, 3p, 3d, 4p, 4s

An atom forms an ion by losing three electrons. The ion has an electronic configuration [Ar]3d⁶. The symbol of the ion is :

Which of the following set of quantum number is not valid
1. n = 1 , $\mathcal{l}$ = 2
2. n=2, m = 1
3. n =3, $\mathcal{l}$ = 0
4. n = 4, $\mathcal{l}$ = 2

The outermost electronic configuration of the most electronegative element is :
1. ns²np³
2. ns²np⁴
3. ns²np⁵
4. ns²np⁶

The correct  sequence of increasing order of density is:
1. Li < K< Na < Rb < Cs
2. Li < Na < K < Rb < Cs
3. Cs < Rb < K < Na < Li
4. K < Li < Na < Rb < Cs

For the reaction:
 CO(g) + $\frac{1}{2}$O₂(g) $\rightleftharpoons$CO₂(g), K_p/K_c is:
1. RT              
2. (RT)^-1               
3. (RT)^-1/2               
4. (RT)^1/2

Which is Lewis base?
1. HCl               
2. HNO₃
3. HF               
4. NH₃

A solution of FeCl₃ in water acts as acidic due to:
1. Acidic impurities                         
2. Ionization
3. Hydrolysis of Fe³⁺                       
4. Dissociation

The IUPAC name of the compound
 
1. 3,3-diethyl-4-methyl-5 (methylethyl)octane
2. 3,3-diethyl-5-isopropyl-4-methyloctane
3. 4-isopropyl-5-methyl-6,6-diethyloctane
4. 6,6-diethyl-4-isopropyl-5-methyloctane

The IUPAC name of the above mentioned compound is:

Isomerism exhibited by acetic acid and methyl formate is:
1. Functional
2. Chain
3. Geometrical
4. Central 

The number of isomeric structures for C₂H₇N would be:
1. 4 
2. 3
3. 2 
4. 1

The (R)- and (S)-enantiomers of an optically active compound differ in
1. their solubility in a chiral solvent
2. their reactivity with a chiral reagent
3. their optical rotation of plane polarised light
4. their melting points

The number of sigma bonds in P₄O₁₀ is 
1. 6
2. 16
3. 20
4. 7

The element among the following that does not show inert pair effect is-

What is the ratio of the number of atoms in 2.2 g of CO₂ and in 1.7 g of NH₃?

Which of the following molecules exhibits H-bonding?

On reduction with CO, 200 kg of iron ore (Fe₂O₃) containing 20% impurities gives iron. The amount of iron produced will be-
1. 84 kg
2. 200 kg
3. 56 kg
4. 112 kg

 A pair of species that have identical shapes is : 
1. NO₂⁺ and NO₂^-
2. PCl₅ and BrF₅
3. XeF₄ and ICI₄^-
4. TeCl₄ and XeO₄

How many moles of KMnO₄ are needed to oxidize a mixture of 1 mole of each FeSO₄ & FeC₂O₄ in acidic medium
1. $\frac{4}{5}$
2. $\frac{5}{4}$
3. $\frac{3}{4}$
4. $\frac{5}{3}$

In Kjeldahl's method, the nitrogen present is estimated as-
1. N₂ 
2. NH₃
3. NO₂ 
4 None of the above

H₂C = O behaves as:
1. Nucleophile
2. Electrophile
3. Both (1) and (2)
4. None of the above 

The optically active compound among the following is-

The least polar bond is present in which of the following?

First three ionisation energies (in kJ/mol) of three representative elements are given below:
Element     $I{E}_1$                    $I{E}_2$                   $I{E}_3$
P               495.8                4562                  6910
Q               737.7               1451                   7733
R               577.5                1817                  2745
Then incorrect option is :
1. Q: Alkaline earth metal.
2. P: Alkali metal.
3. R: s-block element.
4. All three: P,Q & R belong to the same period.

Chemically thermite is -
1.  Fe and Al
2.  Ferric oxide and aluminium powder
3.  Barium peroxide and magnesium powder
4.  Cu and aluminium

The percentage of lead in a lead pencil is-
1.  20
2.  0
3.  80
4.  70

The development of the wave mechanical model of the atom is based on which of the following concepts?
1.  De-Broglie concept of the dual nature of the electron.
2.  Heisenberg uncertainty principle.
3.  Schrodinger's principle
4.  All of the above

In which of the following processes the entropy decreases?
1. Boiling of egg
2. Evaporation of hexane
3. Crystallization of molten NaCl
4. Sublimation of naphthalene

The difference between heat of reaction at constant pressure and constant volume for the reaction
$2{\mathrm{C}}_4{\mathrm{H}}_{10}\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>13{\mathrm{O}}_2\left(\mathrm{g}\right)\to 8{\mathrm{CO}}_2\left(\mathrm{g}\right)+10{\mathrm{H}}_2\mathrm{O}\left(\mathrm{I}\right),<mspace\; width="1em"></mspace>\mathrm{at}<mspace\; width="1em"></mspace>27°\mathrm{C}$ is
1. 7.48 kJ
2. -17.46 kJ
3. -7.48 kJ
4. 37.41 kJ

Correct order of melting point of the given compounds is
1. $\mathrm{NaF}>{\mathrm{MgF}}_2>{\mathrm{AIF}}_3$
2. ${\mathrm{AIF}}_3>{\mathrm{MgF}}_2>\mathrm{NaF}$
3. ${\mathrm{MgF}}_2>\mathrm{NaF}>{\mathrm{AIF}}_3$
4. ${\mathrm{AIF}}_3>\mathrm{NaF}>{\mathrm{MgF}}_2$

If helium gas is added at constant pressure to the following reaction at equilibrium
$\mathrm{CO}\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>3{\mathrm{H}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>\rightleftharpoons <mspace\; width="1em"></mspace>{\mathrm{CH}}_4\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>\mathrm{then}$
1.  Formation of methane will increase
2. Equilibrium shifts in the backward direction
3.  No effect on equilibrium
4.  The activation energy of the reaction will decrease

Which among the following is an antiaromatic species?
1. 
2. 
3. 
4. 

The gas which is least compressible among the following is
1. ${\mathrm{NH}}_3$
2. ${\mathrm{CO}}_2$
3. ${\mathrm{N}}_2$
4. ${\mathrm{CH}}_4$

Consider the following reaction

Major product A and B respectively are
1.  
2.  
3.  
4.  

Which of the following compounds will not produce benzaldehyde on reductive ozonolysis?
1.  
2.  
3.  
4.  

Which pollutant causes brown mottling Of teeth?
1.  Lead
2.  Nitrate
3.  Arsenic
4.  Fluoride

For the galvanic cell $\mathrm{Zn}\left(\mathrm{s}\right)\left|{\mathrm{Zn}}^{2+}\left(\mathrm{aq}\right)\right|\left|{\mathrm{Ag}}^{+}\left(\mathrm{aq}\right)\right|\mathrm{Ag}\left(\mathrm{s}\right),<mspace\; width="1em"></mspace>∆\mathrm{G}°$ of the reaction in joule will be
$\left({\mathrm{E}}_{{\mathrm{Zn}}^{2+}/\mathrm{Zn}}^{\mathrm{o}}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>-0.76<mspace\; width="1em"></mspace>\mathrm{V},<mspace\; width="1em"></mspace>{\mathrm{E}}_{{\mathrm{Ag}}^{+}/\mathrm{Ag}}^{\mathrm{o}}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>0.80<mspace\; width="1em"></mspace>\mathrm{V}\right)$
1.  -2.5 F
2.  -0.4 F
3.  -3.12 F
4.  1.12 F

If bond energies of H-H, Cl-Cl, and H-Cl respectively are 436, 245, and 430 ${\mathrm{kJmol}}^{-1}$ then $∆\mathrm{H}°$ for the reaction $\frac{1}{2}{\mathrm{H}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\frac{1}{2}{\mathrm{Cl}}_2\left(\mathrm{g}\right)<mspace\; width="1em"></mspace>\to <mspace\; width="1em"></mspace>\mathrm{HCl}\left(\mathrm{g}\right)$ will be
1.  -110.5 kJ
2.  -89.5 kJ
3.  +89.5 kJ
4.  +110.5 kJ

Number of B-O-B bonds present in borax is
1.  4
2.  3
3.  5
4.  6

Volume strength of 1.5 N ${\mathrm{H}}_2{\mathrm{O}}_2$ solution is
1.  8.4 V
2.  16.8 V
3.  5.6 V
4.  22.4 V

Which metal nitrate does not give ${\mathrm{NO}}_2$ on heating?
1.  ${\mathrm{LiNO}}_3$
2.  $\mathrm{Be}{\left({\mathrm{NO}}_3\right)}_2$
3.  $\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2$
4.  ${\mathrm{NaNO}}_3$

For the given redox reaction, the coefficients of the reactants for the balanced reaction are
${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{SO}}_3^{2-}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{H}}^{-}<mspace\; width="1em"></mspace>\to <mspace\; width="1em"></mspace>{\mathrm{Cr}}^{3+}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{SO}}_4^{2-}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{H}}_2\mathrm{O}$
        ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$  ${\mathrm{SO}}_3^{2-}$   ${\mathrm{H}}^{+}$
1.          1         4        7
2.          1         2        6
3.          1         4        8
4.          1         3        8

The solubility of AgCl in 0.2 M magnesium chloride will be $\left({\mathrm{K}}_{sp}<mspace\; width="1em"></mspace>\mathrm{of}<mspace\; width="1em"></mspace>\mathrm{AgCl}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>1.8<mspace\; width="1em"></mspace>\mathrm{x}<mspace\; width="1em"></mspace>{10}^{-10}\right)$
1.  1.8 x ${10}^{-10}$
2.  1.8 x ${10}^{-11}$
3.  9 x ${10}^{-10}$
4.  4.5 x ${10}^{-10}$

A block of mass m moving at a velocity v collides with another block of mass \(2~\text m\) at rest. The lighter block comes to rest after collision. Find the coefficient of restitution.
1. \(\frac12\)                                          
2. \(1\)$\mathrm{}$
3. \(\frac13\)                                               
4. \(\frac 14\)

A string of length L is fixed at one end and carries a mass M at the other end. The string makes 2/π revolutions per second around the vertical axis through the fixed end as shown in the figure, then tension in the string is 

1. ML
2. 2 ML
3. 4 ML
4. 16 ML

A thin film of a liquid is formed in a rectangular frame of wire and a light slider supports a weight of 2.5$\times {10}^{-2}$ N. The length of slider is 20 cm and its weight is negligible. The surface tension of liquid is

(1) 6.25 $\times {10}^{-2}$$N{m}^{-1}$
(2) 12.5$\times {10}^{-2}$$N{m}^{-1}$
(3) 25$\times {10}^{-2}$$N{m}^{-1}$
(4) 2.5$\times {10}^{-2}$$N{m}^{-1}$

A train moving with speed 72 km/h towards a hill, blows a whistle of frequency 1240 Hz. The frequency of echo heard by driver is (speed of sound = 330 m/s)
(1) 1440 Hz
(2) 1400 Hz
(3) 1320 Hz
(4) 1420 Hz

A cylinder containing water upto a height of 25 cm, has a hole of area of cross-section $\frac{1}{4}<mspace\; width="1em"></mspace>c{m}^2$ in its bottom. It is counterpoised in a balance. The initial change in its weight, when water just starts flowing out is

(1) Increases by 12.5 gm-wt
(2) Increases by 6.25 gm-wt
(3) Decreases by 12.5 gm-wt
(4) Decreases by 6.25 gm-wt

A particle is executing SHM along a straight line. Then choose the correct statement
(1) Acceleration always decreases the speed of particle.
(2) Acceleration is maximum at mean position.
(3) Acceleration is minimum at extreme position.
(4) Acceleration varies with time and becomes maximum when particle is at rest.

A projectile is projected from ground with speed $30\sqrt{2}$ m/s at an angle of $45°$ with horizontal. At the highest point, it explodes in three equal parts. One part retraces its path and second part falls freely. The distance of third part from point of projection when it hits the ground is
(1) 360 m
(2) 400 m
(3) 450 m
(4) 500 m

A rod of mass m is hinged at upper end A as shown in the figure. A point object having mass m strike at lower end and stops. The maximum angle through which rod will rotate is $\left(\mathrm{Given}<mspace\; width="1em"></mspace>{\mathrm{v}}^2<\frac{2\mathrm{gl}}{3}\right)$

$1.<mspace\; width="1em"></mspace>{\cos }^{-1}\left(1-\frac{3<mspace\; width="1em"></mspace>{\mathrm{v}}^2}{2<mspace\; width="1em"></mspace>\mathrm{gl}}\right)$
$2.<mspace\; width="1em"></mspace>{\cos }^{-1}\left(1-\frac{3<mspace\; width="1em"></mspace>{\mathrm{v}}^2}{<mspace\; width="1em"></mspace>\mathrm{gl}}\right)$
$3.<mspace\; width="1em"></mspace>{\cos }^{-1}\left(1-\frac{{\mathrm{v}}^2}{2<mspace\; width="1em"></mspace>\mathrm{gl}}\right)$
$4.<mspace\; width="1em"></mspace>{\cos }^{-1}\left(1-\frac{<mspace\; width="1em"></mspace>{\mathrm{v}}^2}{<mspace\; width="1em"></mspace>\mathrm{gl}}\right)$

The blocks \(A\) and \(B\) are shown in figure have masses \(5\) kg and \(4\) kg respectively. The system is released from rest. The speed of \(B\) after \(A\) has travelled a distance \(1\) m along the incline is: (take \(g = 10~\text{m/s}^2\), pulleys and strings are ideal and plane is smooth)
 
1. \(\sqrt{\frac{6}{5}}~\text{m/s}\)
2. \(\sqrt{\frac{3}{2}}~\text{m/s}\)
3. \(\sqrt{\frac{5}{6}}~\text{m/s}\)
4. \(\sqrt{\frac{2}{3}}~\text{m/s}\)

The ratio of ${\mathrm{v}}_{\mathrm{rms}}:{\mathrm{v}}_{\mathrm{mp}}:{\mathrm{v}}_{\mathrm{avg}}$ is: (symbols have their usual meaning)
$1.<mspace\; width="1em"></mspace>\sqrt{3}:\sqrt{2}:\sqrt{\frac{\mathrm{\pi }}{8}}$
$2.<mspace\; width="1em"></mspace>\sqrt{3}:\sqrt{2}:\sqrt{\frac{8}{3}}$
$3.<mspace\; width="1em"></mspace>\sqrt{3}:\sqrt{\frac{8}{\mathrm{\pi }}}:\sqrt{2}$
$4.<mspace\; width="1em"></mspace>\sqrt{3}:\sqrt{2}:\sqrt{\frac{8}{\mathrm{\pi }}}$

A small disk of mass m is released at height h, on a circular track of radius R, whose part AB has sufficient friction to prevent slipping, while BC is smooth. The maximum height attained by disk on BC is

(1) $\frac{2}{3}<mspace\; width="1em"></mspace>h$
(2) $\frac{h}{2}$
(3) h
(4) $\frac{h}{3}$

A tuning fork gives 5 beats/s when sounded with an open pipe of length 20 cm vibrating in its fundamental mode. It again gives 5 beats/s, if length of pipe is increased by 1 cm and it vibrates in its new fundamental mode. The frequency of tuning fork is
(1) 200 Hz
(2) 210 Hz
(3) 220 Hz
(4) 205 Hz

20 g steam at $100°\mathrm{C}$ is passed through 15 g ice at $-12°\mathrm{C}.$ The mass of water in calorimeter will be nearly (specific heat of ice = 0.5 cal/$\mathrm{g}°\mathrm{C}$, specific heat of water=1 cal/$\mathrm{g}°\mathrm{C}$ ,latent heat of vaporization 540 cal/g, latent heat of fusion=80 cal/g and neglect heat capacity of calorimeter).
1. 20 g water at $100°\mathrm{C}$
2. 25 g water at $100°\mathrm{C}$
3. 18 g water at $100°\mathrm{C}$
4. 15 g water at $100°\mathrm{C}$

In a thermodynamic cyclic process ABC, Internal energy at A is 10 J and at B is 70 J. Heat given in process B to C is 100 J, then heat released or absorbed in process C to A is

1. 760 J (absorbed)
2. 760 J (released)
3. 240 J (absorbed)
4. 240 J (released)

A body of mass 10 kg moves along a straight line y=x+5, where x and y are in metres, with velocity $2\sqrt{2}$ m/s. Its angular momentum about a point having co-ordinate (0, 1) is
1. $100<mspace\; width="1em"></mspace>kg<mspace\; width="1em"></mspace>m^2{s}^{-1}$
2. $80<mspace\; width="1em"></mspace>kg<mspace\; width="1em"></mspace>m^2{s}^{-1}$
3. $100\sqrt{2}<mspace\; width="1em"></mspace>kg<mspace\; width="1em"></mspace>m^2{s}^{-1}$
4. $50\sqrt{2}<mspace\; width="1em"></mspace>kg<mspace\; width="1em"></mspace>m^2{s}^{-1}$

A particle located at position x=0, at time t=0, starts moving along the positive x-direction with a velocity ${\mathrm{v}}^2=\mathrm{\alpha x}$ (where $\mathrm{\alpha }$ is a positive constant). The displacement of particle is proportional to
$1.<mspace\; width="1em"></mspace>t^2$
$2.<mspace\; width="1em"></mspace>\frac{1}{t^2}$
$3.<mspace\; width="1em"></mspace>t$
$4.<mspace\; width="1em"></mspace>\frac{1}{t}$

A projectile is projected in air with initial velocity $\overrightarrow{\mathrm{v}}=(3\hat{\mathrm{i}}+4\hat{j})$m/s from the origin. The equation of trajectory of the projectile is given as $(\mathrm{g}=-10\hat{\mathrm{j}}<mspace\; width="1em"></mspace>\mathrm{m}/{\mathrm{s}}^2)$ (neglect air resistance)
$1.<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{y}=12\mathrm{x}-5{\mathrm{x}}^2$
$2.<mspace\; width="1em"></mspace>\mathrm{y}=3\mathrm{x}-4{\mathrm{x}}^2$
$3.<mspace\; width="1em"></mspace>9\mathrm{y}=12\mathrm{x}-5{\mathrm{x}}^2$
$4.<mspace\; width="1em"></mspace>12\mathrm{y}=12\mathrm{x}-5{\mathrm{x}}^2$

Let gravitational potential energy U is given by $\mathrm{U}=\frac{\mathrm{A}\sqrt{\mathrm{x}}}{\mathrm{B}+{\mathrm{x}}^2}$, where x is distance. The dimensional formula of $\frac{\mathrm{A}}{\mathrm{B}}$ is
$1.<mspace\; width="1em"></mspace>\left[M{L}^{\frac{5}{2}}{T}^{-2}\right]$
$2.<mspace\; width="1em"></mspace>\left[M{L}^{\frac{1}{2}}{T}^{-2}\right]$
$3.<mspace\; width="1em"></mspace>\left[M{L}^{\frac{3}{2}}{T}^{-2}\right]$
$4.<mspace\; width="1em"></mspace>\left[M{L}^2{T}^{-2}\right]$

A person moves 30 m north, then 20 m east and
then $30\sqrt{2}$ m south-west. His displacement from
the original position is
1. 14 m south-west 
2. 28 m south
3. 10 m west 
4. 15 m east

The given graph shows the variation of velocity with
displacement. Which one of the following graphs
correctly represents the variation of acceleration with
displacement?

1. 
2. 
3. 
4. 

A balloon is going vertically upwards with a velocity
of 10 m/s. When it is 75 m above the ground, a
stone is gently released from it. The time taken by
the stone to reach the ground is (g = 10 m/s²)
1. 3 s
2. 4 s
3. 5 s
4. 6 s

A projectile is projected with a speed u at an angle
$\mathrm{\theta }$ with the horizontal. What is the speed when its
direction of motion makes an angle $\frac{\mathrm{\theta }}{2}$with the
horizontal?
1. $\frac{\mathrm{ucos\theta }}{2}$
2. $\mathrm{ucos\theta }$
3. $\mathrm{u}\left(2\cos \frac{\mathrm{\theta }}{2}-\sec \frac{\mathrm{\theta }}{2}\right)$
4. $\mathrm{u}\left(\cos \frac{\mathrm{\theta }}{2}-\sec \frac{\mathrm{\theta }}{2}\right)$

A particle crossing the origin of the coordinates at
time t = 0, moves in the xy-plane with a constant
acceleration $\mathrm{\beta }$ in y-direction. If its equation is
y = $\mathrm{\alpha }$ x² ( $\mathrm{\alpha }$ is a constant) its velocity component in
the x-direction is
1. $\sqrt{\frac{\mathrm{\alpha }}{\mathrm{\beta }}}$
2. $\sqrt{\frac{\mathrm{\beta }}{\mathrm{\alpha }}}$
3. $\sqrt{\frac{\mathrm{\alpha }}{2\mathrm{\beta }}}$
4. $\sqrt{\frac{\mathrm{\beta }}{2\mathrm{\alpha }}}$

In the given diagram, with what force must the man
pull the rope to hold the plank in position? Weight
of the man is 60 kg. Neglect the weights of plank,
rope and pulley

1. 150 N 
2. 300 N
3. 600 N 
4. 120 N

A block is kept on a frictionless inclined surface with
angle of inclination $\mathrm{\alpha }$. The incline is given an
acceleration a to keep the block stationary. Then a
is equal to

1. g
2. $\mathrm{g}<mspace\; width="1em"></mspace>\mathrm{tan\alpha }$
3. $\mathrm{g}/<mspace\; width="1em"></mspace>\mathrm{tan\alpha }$
4. $\mathrm{g}<mspace\; width="1em"></mspace>\mathrm{cosec\alpha }$

Speed of a body of mass m is increased from 0 to
v. Work done by all forces acting on it is equal to
1. $\frac{1}{2}m{v}^2$
2. ${\mathrm{mv}}^2$
3. $2{\mathrm{mv}}^2$
4. zero

In the arrangement shown, the pulleys are fixed and
ideal, the string are light, M₁ > M₂ and S is a spring
balance which is itself massless. The reading of S
is

1. ${\mathrm{M}}_1-{\mathrm{M}}_2$
2. $\frac{1}{2}\left(M_1+M_2\right)$
3. $\frac{{\mathrm{M}}_1{\mathrm{M}}_2}{\left({\mathrm{M}}_1+{\mathrm{M}}_2\right)}$
4. $\frac{2{\mathrm{M}}_1{\mathrm{M}}_2}{\left({\mathrm{M}}_1+{\mathrm{M}}_2\right)}$

In the figure, frictional force acting on the upper block

1. 8 N 
2. 2 N
3. 25 N 
4. Zero

A body of mass m dropped from a height H reaches
the ground with a speed of 1.2 $\sqrt{\mathrm{gH}}$ . The work done
by air friction is
1. 0.14 mgH 
2. 0.28 mgH
3. – 0.14 mgH 
4. – 0.28 mgH

A disc of mass M and radius R is rolling with angular
speed $\mathrm{\omega }$ on a horizontal plane as shown. The
magnitude of the angular momentum of the disc
about the origin O is

1. $\frac{1}{2}M{R}^2\omega$
2. $M{R}^2\omega$
3. $\frac{3}{2}M{R}^2\omega$
4. $\mathit{2}M{R}^2\omega$

Suppose the gravitational force varies inversely as the
n^th power of distance. Then the time period of a
planet in circular orbit of radius R around the sun will
be proportional to
1. ${\mathrm{R}}^{\left(\frac{\mathrm{n}+1}{2}\right)}$
2. ${\mathrm{R}}^{\left(\frac{\mathrm{n}-1}{2}\right)}$
3. ${\mathrm{R}}^{\mathrm{n}}$
4. ${\mathrm{R}}^{\left(\frac{\mathrm{n}-2}{2}\right)}$

The escape velocity for planet is v_e. A tunnel is dug
along a diameter of the planet and a small body is
dropped into it at the surfaces. When the body
reaches the centre of the planet, its speed will be
1. ${\mathrm{v}}_{\mathrm{e}}$
2. $\frac{{\mathrm{v}}_{\mathrm{e}}}{\sqrt{2}}$
3. $\frac{{\mathrm{v}}_{\mathrm{e}}}{2}$
4. zero

The displacement equation of a particle is
x = 3sin 2t + 4cos 2t. The amplitude and maximum
velocity will be respectively
1. 5, 10 
2. 3, 2
3. 4, 2 
4. 3, 4

Two pendulums of length 1 m and 16 m are in phase
at the mean position at a certain instant of time. If
T is the time period of shorter pendulum, then the
minimum time after which they will be again in
phase
1. $\frac{\mathrm{T}}{3}$
2. $\frac{2\mathrm{T}}{3}$
3. $\frac{4\mathrm{T}}{3}$
4. $\frac{8\mathrm{T}}{3}$

A tube containing a liquid moves with a horizontal
acceleration a along a direction joining the two
vertical limbs. The separation between these limbs is
d. The difference in their liquid level is
1. $\frac{\mathrm{ad}}{\mathrm{g}}$
2. $\frac{2\mathrm{ad}}{\mathrm{g}}$
3. $\frac{\mathrm{ad}}{2\mathrm{g}}$
4. $\mathrm{d}<mspace\; width="1em"></mspace>\tan \left(\frac{\mathrm{a}}{\mathrm{g}}\right)$

A uniform rod of mass m, length l, area of cross
section A and Young’s modulus Y hangs from
ceiling. Its elongation under its own weight will be
1. zero
2. $\frac{\mathrm{MgI}}{2\mathrm{AY}}$
3. $\frac{\mathrm{MgI}}{\mathrm{AY}}$
4. $\frac{2\mathrm{MgI}}{\mathrm{AY}}$

A racing car moving towards a cliff sound its horn.
The driver observes that the sound reflected from the
cliff has a pitch one octave higher than the actual
sound of the horn. If V is the velocity of sound, then
the velocity of the car is
1. $\frac{\mathrm{V}}{\sqrt{2}}$
2. $\frac{\mathrm{V}}{2}$
3. $\frac{\mathrm{V}}{3}$
4. $\frac{\mathrm{V}}{4}$

An organ pipe closed at one end has fundamental
frequency of 1500 Hz. The maximum number of
overtones generated by this pipe which a normal
person can hear is
1. 14 
2. 13
3. 6 
4. 9

When the temperature of a body increases from t to
t + $∆$t, its moment of inertia increases from I to
I + $∆$I. The coefficient of linear expansion of the
body is $\mathrm{\alpha }$. The ratio $\frac{∆\mathrm{I}}{\mathrm{I}}$is equal to
1. $\frac{∆\mathrm{t}}{\mathrm{t}}$
2. $\frac{2∆\mathrm{t}}{\mathrm{t}}$
3. $\mathrm{\alpha }∆\mathrm{t}$
4. $2\mathrm{\alpha }∆\mathrm{t}$

Heat absorbed by a diatomic gas is 70 J in isobaric process. Change in
internal energy of the gas is
1. 20 J
2. 50 J
3. 70 J
4. Zero

How much steam at 100°C will just melt 64 g of ice
at –10°C ?
1. 8.5 g
2. 6.5 g
3. 4.5 g
4. 2.5 g

Three rods of identical area of cross section are
made from the same material form the sides of an
isosceles triangle ABC right angled at B. The point
A and B are maintained at temperature T and
$\sqrt{2}$ T respectively. In the steady state the
temperature of the point C is T_C . Assuming that
only heat conduction takes place, T_C /T  is equal to
1. $\frac{1}{\sqrt{2}+1}$
2. $\frac{3}{\sqrt{2}+1}$
3. $\frac{1}{2\left(\sqrt{2}-1\right)}$
4. $\frac{1}{\sqrt{3}\left(\sqrt{2-1}\right)}$

P-V graph was obtained from state 1 to state 2
when a given mass of a gas is subjected to
temperature changes. During process, the gas is

1. Heated continuously
2. Cooled continuously
3. Heated in beginning and cooled towards the end
4. Cooled in beginning and heated towards the end

An ideal refrigerator is used to transfer heat from a
freezer at –23°C to the surrounding at 27°C. Its
coefficient of performance is
1. 2.5 
2. 5
3. 7.5 
4. 10