1. Deletion mutation
2. Start codon at the 5' end
3. Palindromic sequence of base pairs
4. Replication completed
1. Seeds of orchids have oil-rich endosperm
2. Placentation in primrose is basal
3. Flower of a tulip is a modified shoot
4. In tomato, fruit is a capsule
1. | carry blood away from the heart to different organs |
2. | break up into capillaries which reunite to form a vein |
3. | carry blood from one visceral organ to another visceral organ |
4. | supply oxygenated blood to the different organs |
I. | Burrowing in soil to escape high temperature |
II. | Losing heat rapidly from the body during high temperature |
III. | Bask in the sun when the temperature is low |
IV. | Insulating body due to the thick fatty dermis |
1. | (I) and (III) | 2. | (II) and (IV) |
3. | (I) and (II) | 4. | (III) and (IV) |
1. | rice | 2. | wheat |
3. | bajra | 4. | maize |
Which one of the following structural formulae of two organic compounds are correctly identified along with its related function?
1. A- Triglyceride – a major source of energy
2. B- Uracil – a component of DNA
3. A- Lecithin – a component of cell membrane
4. B- Adenine – a nucleotide that makes up nucleic acids
A certain patient, X, is suspected to be suffering from acquired immune deficiency syndrome. Which diagnostic technique will you recommend for its detection?
1. | MRI | 2. | Ultra Sound |
3. | WIDAL | 4. | ELISA |
Which one of the following statements is correct for secondary succession?
1. | It occurs on a deforested site |
2. | It follows primary succession |
3. | It is similar to primary succession except that it has a relatively slow pace |
4. | All of the above |
1. egg
2. synergid
3. zygote
4. suspensor
Which one of the following pairs of gases are the cause of 'Greenhouse effect'?
1.
2.
3.
4.
1. | UNEP - United Nations Environmental Policy |
2. | EPA - Environmental Pollution Agency |
3. | IUCN -International Union for Conservation of Nature and Natural Resources |
4. | IPCC -International Panel for Climate Change |
1. | It shows the energy content of different trophic-level organisms |
2. | It is inverted in shape |
3. | It is upright in shape |
4. | Its base is broad |
Match the source gland with its respective hormone as well as the function.
Source gland |
Hormone | Function | |
(a) | Posterior pituitary |
Vasopressin | Stimulates reabsorption of water in the distal tubules in the nephron |
(b) | Corpus luteum |
Prolactin | Supports pregnancy |
(c) | Thyroid | Thyroxine | Regulates blood calcium level |
(d) | Anterior pituitary |
Oxytocin | Contraction of uterus muscles during childbirth |
1. (a)
2. (b)
3. (c)
4. (d)
1. Twelve weeks
2. Eighteen weeks
3. Six weeks
4. Eight weeks
1. | Insects | 2. | Birds |
3. | Angiosperms | 4. | Fungi |
1. | 100/55 mmHg is considered an ideal blood pressure |
2. | 105/50 mmHg makes one very active |
3. | 190/110 mmHg may harm vital organs like the brain and kidney |
4. | 130/90 mmHg is considered high and requires treatment |
Given ahead is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C.
Gland | Secretion | Effect on Body |
A | Oestrogen | Maintenance of secondary sexual characters |
Alpha cells of islets of Langerhans | B | Raises blood sugar level |
Anterior pituitary | C | Oversecretion leads to gigantism |
Options: | A | B | C |
1. | Placenta | Insulin | Vasopressin |
2. | Ovary | Insulin | Calcium |
3. | Placenta | Glucagon | Calcitonin |
4. | Ovary | Glucagon | Growth hormone |
1. | the typhlosole greatly increases the effective absorption area of the digested food in the intestine |
2. | the S-shaped setae embedded in the integument are the defensive weapons used against the enemies |
3. | it has a long dorsal tubular heart |
4. | fertilization of eggs occurs inside the body |
1. flower buds
2. shoot buds
3. axillary buds
4. root buds
1. Propane
2. Mustard gas
3. Marsh gas
4. Laughing gas
Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of:
1. | diaphragm | 2. | neck |
3. | tongue | 4. | epiglottis |
The figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?
1. | A – Alveolar cavity – main site of exchange of respiratory gases |
2. | D – Capillary wall – exchange of O2 and CO2 takes place here |
3. | B – Red blood cell – transport of CO2 mainly. |
4. | C – Arterial capillary – passes oxygen to tissues |
If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from:
1. epididymis to vas deferens
2. ovary to uterus
3. vagina to uterus
4. testis to epididymis
1. Rhizobium
2. Frankia
3. Anabaena
4. Glomus
1. mangroves
2. tropical rainforests
3. alpine forests
4. temperate forests
1. Type AB
2. Type O
3. Type A
4. Type B
1. Tubectomy
2. Diaphragms
3. IUDs (Intra Uterine Devices)
4. Cervical caps
1. | secondary growth | 2. | disease resistance |
3. | reproduction | 4. | conserving water |
The function of leghemoglobin in the root nodules of legumes is:
1. oxygen removal
2. nodule differentiation
3. expression of nif gene
4. inhibition of nitrogenase activity
1. Heart
2. Kidney
3. Pancreas
4. Brain
1. Rennin
2. Lipase
3. Trypsin
4. Pepsin
1. vitamin-C
2. vitamin-D
3. vitamin-A
4. vitamin-B
1. fungi
2. viruses
3. insects
4. nematodes
1. Escherichia coli
2. Euglena viridis
3. Amoeba proteus
4. Paramecium caudatum
1. | XO type of sex chromosomes determines male sex in grasshopper |
2. | XO condition in humans as found in Turner syndrome, determines female sex |
3. | Homozygous sex chromosomes (XX) produce males in Drosophila |
4. | Homozygous sex chromosomes (ZZ) determine the female sex in birds. |
1. | mice | 2. | cow |
3. | pig | 4. | fish |
1. Rice
2. Maize
3. Mango
4. Groundnut
1. obtain antibiotics
2. purify enzymes
3. degrade sewage
4. produce methane
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?
1. | 63 | 2. | 84 |
3. | 21 | 4. | 42 |
1. convert free nitrogen to nitrogen compounds
2. convert proteins into ammonia
3. reduce nitrates to free nitrogen
4. oxidize ammonia to nitrates
Mannitol is a sugar alcohol. It is as stored food in:
1. Fucus
2. Gracillaria
3. Chara
4. Porphyra
1. Rhizobium
2. Nostoc
3. Mycorrhiza
4. Agrobacterium
1. | Detritus | 2. | Humus |
3. | Standing state | 4. | Standing crop |
1. Serum amylase
2. A globulin
3. Fibrinogen
4. Albumin
What type of human population is represented by the following age pyramid?
1. Golgi apparatus
2. plastid
3. lysosome
4. vacuole
1. | Oxygen is transported by hemoglobin in blood |
2. | The nitrogenous excretory product is urea |
3. | The food is ground by mandibles and gizzard |
4. | Malpighian tubules are excretory organs projecting out from the colon |
1. | Henle’s loop – most reabsorption of the major substances from the glomerular filtrate |
2. | Distal convoluted tubule – reabsorption of ions into the surrounding blood capillaries |
3. | Afferent arteriole – carries the blood away from the glomerulus towards renal vein |
4. | Podocytes - create minute spaces (slit pores) for the filtration of blood into the Bowman’s capsule |
1. | Male frog – a copulatory pad on the first digit of the hind limb |
2. | Female cockroach – anal cerci |
3. | Male shark – claspers borne on pelvic fins |
4. | Female Ascaris – sharply curved posterior end |
1. | Chromatids start moving towards opposite poles in telophase. |
2. | Golgi complex and endoplasmic reticulum are still visible at the end of prophase. |
3. | Chromosomes move to the spindle equator and get aligned along the equatorial plate in metaphase. |
4. | Chromatids separate but remain in the center of the cell in anaphase. |
The correct floral formula of chilli is:
1. | ⊕⚥K5 C5 A5 G(2) | 2. | ⊕⚥K5 C5 A5 G(2) |
3. | ⊕⚥K(5) C(5)A5 G(2) | 4. | ⊕⚥K(5) C5 A5 G(2) |
1. soya meal
2. ground gram
3. molasses
4. com meal
1. | Calcium | 2. | Potassium |
3. | Sulphur | 4. | Phosphorus |
1. | Clostridium | 2. | Trichoderma |
3. | Aspergillus | 4. | Saccharomyces |
A large proportion of oxygen is left unused in the human blood even after its uptake by body tissues. This O2:
1. raises the Pco2 blood to 75 mm of Hg
2. is enough to keep oxyhaemoglobin
3. helps in releasing more O2 to the epithelial tissues
4. acts as a reserve during muscular exercise
1. | Human foetus developing inside the uterus draws nourishment from the mother |
2. | Head louse living on the human scalp as well as laying eggs on human hair |
3. | The cuckoo (koel) lays its eggs in a crow's nest |
4. | The female Anopheles bites and sucks blood from humans |
At which stage of HIV infection does one usually shows symptoms of AIDS?
1. | When viral DNA is produced by reverse transcriptase. |
2. | When HIV replicates rapidly in helper T-lymphocytes and damages a large number of these. |
3. | Within 15 days of sexual contact with an infected person. |
4. | When the infecting retrovirus enters host cells. |
1. Thousands of human beings died
2. Radioactive fall-out engulfed Bhopal
3. It took place on the night of December 2/3, 1984
4. Methyl isocyanate gas leakage took place
1. all tissues except epidermis and vascular bundles
2. epidermis and cortex
3. all tissues internal to endodermis
4. all tissues external to endodermis
1. C-Infundibulum, D-Fimbriae, E-Cervix
2. D-Oviducal funnel, E-Uterus, F-Cervix
3. A-perimetrium, B-Myometrium, C-Fallopian tube
4. B-Endometrium, C-Infundibulum, D-Fimbriae
1. Brassica
2. Zea maize
3. Jatropha
4. Pongamia
1. gulmohur
2. tomato
3. datura
4. mustard
1. sn RNA
2. hn RNA
3. 23 S rRNA
4. 5 S rRNA
1. Shortening of jaws
2. Binocular vision
3. Increasing brain capacity
4. Upright posture
1. nucleus
2. ribosomes
3. cell wall
4. plasma membrane
In which one of the following the genus name, its two characters and its class/phylum are correctly matched?
Genus | Two Characters | Class/phylum |
(a) Salman dra | (i) A tympanum represents ear (ii) Fertilisation is external |
Amphibia |
(b) Pteropus | (i) Skin possesses hair (ii) Oviparous |
Mammalia |
(c) Aurelia | (i) Cnidobles (ii) organ level of Organisation |
Coelenterata |
(d) Ascaris | (i) Body segmented (ii) Males and Female distinct |
Annelida |
3. (c)
4. (d)
1. Cuttlefish – Mollusca, a class
2. Humans – Primate, the family
3. Housefly – Musca, an order
4. Tiger – Tigris, the species
1. IAA
2. ethylene
3. gamma radiations
4. infrared radiations
1. mitochondria
2. endoplasmic reticulum
3. chloroplasts
4. cytoskeleton
1. Convoluted tubules
2. Collecting ducts
3. Loops Henle
4. Peritubular capillaries
1. | Chordata – possess a mouth provided with an upper and a lower jaw |
2. | Chondrichthyes – possess cartilaginous endoskeleton |
3. | Mammalia – give birth to young ones |
4. | Reptilia – possesses 3-incomplete heart with one incompletely divided ventricle. |
1. Tears
2. Monocytes
3. Skin
4. Epithelium of urogenital tract
1. | equally permeable to both Na+ and K+ ions |
2. | impermeable to both Na+ and K+ ions |
3. | comparatively more permeable to K+ ions and nearly impermeable to Na+ ions |
4. | comparatively more permeable to Na+ ions and nearly impermeable to K+ ions |
1. Gossypium
2. Triticum
3. Brassia
4. Citrus
1. transformation
2. splicing
3. metamorphosis
4. heterosis
The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration) what do the two axis (X and Y) represent?
X-axis |
Y-axis |
|
(a) |
Temperature |
Enzyme activity |
(b) |
Substrate concentration |
Enzyme activity |
(c) |
Enzyme activity |
Temperature |
(d) |
Enzyme activity |
pH |
1. (a)
2. (b)
3. (c)
4. (d)
1. birds and annelids
2. amphibians and reptiles
3. insects and amphibians
4. reptiles and birds
1. | escaping any possible compression by the visceral organs |
2. | providing more space for a large epididymis |
3. | providing a secondary sexual feature for exhibiting the male sex |
4. | maintaining the scrotal temperature lower than the internal body temperature |
1. cucumber
2. cotton
3. guava
4. peach
1. | Exposure to cold temperature stimulates ADH release |
2. | An increase in glomerular blood flow stimulates the formation of angiotensin II |
3. | During summer when the body loses a lot of water by evaporation, the release of ADH is suppressed |
4. | When someone drinks a lot of water, ADH release is suppressed. |
1. | Red blood corpuscles of humans suffering from malaria |
2. | Spleen of infected humans |
3. | Salivary glands of a freshly moulted female anopheles mosquito |
4. | Saliva of an infected female anopheles mosquito |
1. | Y > X > Z | 2. | Z > X > Y |
3. | X > Y > Z | 4. | Y > Z > X |
The linear molecules among the following is:
1.
2.
3.
4.
The Clemmensen reduction of a ketone is carried out in the presence of:
1. - with
2.
3. and as a catalyst
4. Glycol with
1. 0.8 atm
2. 0.9 atm
3. 1 atm
4. 0.5 atm
Given below is a reaction sequence: |
1. | |
2. | |
3. | |
4. |
If x is the amount of adsorbate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?
1.
2.
3.
4.
The freezing point depression constant for water is 1.86 oC m-1. If 5.00 g Na2SO4 is dissolved in 45.0 g H2O, the freezing point is changed by -3.82 oC. The van’t Hoff factor for Na2SO4 is:
1. | 2.63 | 2. | 3.11 |
3. | 0.381 | 4. | 2.05 |
Which of the two ions from the list given below have the geometry that is explained by the same hybridisation of orbitals, ?
1.
2.
3.
4.
The d-electron configurations of Cr2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6, and d7 respectively.
Minimum paramagnetic behavior is shown by:
(At. No C = 24, Mn = 25, Fe = 26, Co = 27)
1. [Fe(H2O)6]2+
2. [Co(H2O)6]2+
3. [Cr(H2O)6]2+
4. [Mn(H2O)6]2+
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?
(At. No Cr= 24, Mn= 25, Fe=26, Co= 27)
1. Fe>Mn>Co>Cr
2. Co>Mn>Fe>Cr
3. Cr>Mn>Co>Fe
4. Mn>Fe>Cr>Co
The van’t Hoff factor, i, for a compound that undergoes
dissociation and association in a solvent is, respectively:
1. Less than one and less than one.
2. Greater than one and less than one.
3. Greater than one and greater than one.
4. Less than one and greater than one.
Which one of the following statements is not true regarding (+) lactose?
1. | (+) lactose is a β -glycoside and a molecule of D(+) galactose |
2. | (+) lactose is a reducing sugar and does not exhibit mutarotation |
3. | (+) lactose, C 12 H 22 O 11 contains 8-0 H groups |
4. | On hydrolysis (+) lactose gives equal amount of D(+) glucose and D(+) galactose |
If the for a given reaction has a negative value, then which of the following gives the correct relationship for the values of ?
1.
2.
3.
4.
1. Diphenylhydramine
2. Norethindrone
3. Omeprazole
4. Chloramphenicol
Which of the following elements is present as an impurity to the maximum extent in the pig Iron?
1. Carbon
2. Silicon
3. Phosphorus
4. Manganese
Of the following complex ions, which is diamagnetic in nature?
1.
2.
3.
4.
Cu2+(aq) + e- → Cu+(aq) | 0.15 V |
Cu+(aq) + e- → Cu(s) | 0.50 V |
1. | 0.325 V | 2. | 0650 V |
3. | 0.150 V | 4. | 0.500 V |
1. | The greater metallic character of the lanthanoids than that of the corresponding actinoids. |
2. | More energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals. |
3. | The lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals. |
4. | More active nature of the actinoids. |
The incorrect statement regarding the order of reaction is:
1. | Order is not influenced by the stoichiometric coefficient of the reactants. |
2. | Order of reaction is the sum of power to the concentration terms of reactants to express the rate of reaction. |
3. | The order of reaction is always a whole number. |
4. | Order can be determined by experiments only. |
The correct order of increasing bond length of C-H, C-O, C-C and C=C is:
1.
2.
3.
4.
A compound among the following that is least likely to behave as a Lewis base is:
1. | NH3 | 2. | BF3 |
3. | OH- | 4. | H2O |
The polymer that can be classified as polyster polymer is:
1. Bakelite
2. Melamine
3. Nylon-66
4. Terylene
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of is 0.20 M. If the equilibrium constant, Kb for NH3 equals 1.8×10-5, then what is the pH of this solution?
(log 1.8 = 0.25; log 0.67 = -0.176)
1. 9.43
2. 11.72
3. 8.73
4. 9.08
Standard electrode potential for Sn4+/Sn2+ couple is +0.15 V and that for Cr3+/Cr couple is -0.74. These two couples in their standard state are connected to make a cell. The cell potential will be:
1. +0.89 V
2. +0.18 V
3. +1.83 V
4. +1.199 V
The product 'D' in the below-mentioned reaction will be:
1. | 2. | ||
3. | 4. |
1. | Sheet silicate | 2. | Pyrosilicate |
3. | Three dimensional silicate | 4. | Linear chain silicate |
The correct IUPAC name of the given compound is:
1. 3-Ethyl-4-ethenylheptane
2. 3-Ethyl-4-propylhex-5-ene
3. 3-(1-Ethyl propyl) hex-1-ene
4. 4-Ethyl-3-propylhex-1-ene
The product formed in the below mentioned reaction is:
1. | 2. | ||
3. | 4. |
Identify which of the following is the correct option for free expansion of an ideal gas under adiabatic condition.
1.
2.
3.
4.
Given the following reaction:
\(4H(g)\)→ \(2 H_{2}\)\((g)\)
The enthalpy change for the reaction is -869.6 kJ. The dissociation energy of the H-H bond is:
1. -869.6 kJ
2. +434.8kJ
3. +217.4kJ
4. -434.8 kJ
1. 12.25 U
2. 6.50 U
3. 25.00 U
4. 50.00 U
The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] show:
1. Ionisation isomerism
2. Co-ordination isomerism
3. Geometrical isomerism
4. Linkage isomerism
A pair of metals that can be purified by van Arkel method is:
1. Zr and Ti
2. Ag and Au
3. Ni and Fe
4. Ga and In
The example of a nucleophilic substitution reaction among the following is:
1. | |
2. | |
3. | |
4. |
Which of the following compounds has the lowest melting point?
1.
2.
3.
4.
1. 16
2. 32
3. 4
4. 8
The most reactive compound among the following toward electrophilic aromatic substitution reaction is:
1. | 2. | ||
3. | 4. |
By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?
1. 2.8
2. 4.0
3. 1.4
4. 2.0
In Duma’s method of estimation of nitrogen 0.35 of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be:
(Aqueous tension at 300K= 15 mm)
1. | 16.45 | 2. | 17.45 |
3. | 14.45 | 4. | 15.45 |
The number of geometrical isomers shown by are:
1. | 4 | 2. | 0 |
3. | 2 | 4. | 3 |
Mole fraction of solute in a 1.00 molal aqueous solution is:
1. 0.0177
2. 0.0344
3. 1.770
4. 0.1770
The value of for the reaction is less than zero. Formation of will be favoured at:
1. Low pressure and low temperature
2. High temperature and low pressure
3. High pressure and low temperature
4. High temperature and high pressure
The Lassaigne’s extract is boiled with conc. while testing for halogens, because it:
1. Helps in the precipitation of
2. Increases the solubility product of
3. Increases the concentration of ions
4. Decomposes and , if formed
For the reaction the equilibrium constant is K1. The equilibrium constant is K2 for the reaction
The value of K for the reaction given below will be:
1.
2.
3.
4.
The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., and will be:
1.
2.
3.
4.
Which of the following has the minimum bond length?
1.
2.
3.
4.
Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This is due to the formation of:
1.
2.
3.
4.
Which one of the following statements is not true?
1. | Concentration of dissolved oxygen below 5 ppm is good for the growth of fish. |
2. | Clean water would have a BOD value of less than 5 ppm. |
3. | Oxides of sulphur, nitrogen, and carbon are the most widespread air pollutant. |
4. | pH of drinking water should be between 6.5-8.5. |
If n = 6, the correct sequence for the filling of electrons will be:
1.
2.
3.
4.
An active ingredient in bleaching powder that aids in the bleaching action is:
1.
2.
3.
4.
In the Davisson and Germer experiment, the velocity of electrons emitted from the electron gun can be increased by:
1. | increasing the filament current. |
2. | decreasing the filament current. |
3. | decreasing the potential difference between the anode and filament. |
4. | increasing the potential difference between the anode and filament. |
The symbolic representation of four gates is shown as:
Pick out which ones are for AND, NAND, and NOT gates, respectively.
1. (i), (iv), and (iii)
2. (ii), (iii), and (iv)
3. (ii), (iv), and (iii)
4. (ii), (iv), and (i)
A radioactive nucleus of mass M emits a photon of frequency and the nucleus will recoil. The recoil energy will be:
1.
2. zero
3.
4.
A particle moves in a circle of radius \(5\) cm with constant speed and time period \(0.2\pi\) s. The acceleration of the particle is:
1. | \(25\) m/s2 | 2. | \(36\) m/s2 |
3. | \(5\) m/s2 | 4. | \(15\) m/s2 |
The power obtained in a reactor using \(\mathrm{U}^{235}\) disintegration is \(1000~\text{kW}\). The mass decay of \(\mathrm{U}^{235}\) per hour is approximately equal to:
1. \(20~\mu\text{g}\)
2. \(40~\mu\text{g}\)
3. \(1~\mu\text{g}\)
4. \(10~\mu\text{g}\)
The half-life of a radioactive element X is 50 yrs. It decays to another element Y which is stable. The two elements X and Y were found to be in the ratio of 1:15 in a sample of a given rock. The age of the rock was estimated to be:
1. 200 yr
2. 250 yr
3. 100 yr
4. 150 yr
A parallel plate condenser has a uniform electric field \(E\) (V/m) in the space between the plates. If the distance between the plates is \(d\) (m) and the area of each plate is \(A\) (m2), the energy (joule) stored in the condenser is:
1. \( \frac{1}{2}\varepsilon_0{E}^2 \)
2. \( \frac{{E}^2 {Ad}}{\varepsilon_0} \)
3. \( \frac{1}{2}\varepsilon_0 E^2 Ad \)
4. \(\varepsilon_0 EAd \)
If power dissipated in the 9 resistor in the circuit shown is 36 W, the potential difference across the 2 resistor will be:
1. 8 V
2. 10 V
3. 2 V
4. 4 V
Two waves are represented by the equations and
,
where \(x\) is in metres and \(t\) in seconds. The phase difference between them is:
1. \(1.25\) rad
2. \(1.57\) rad
3. \(0.57\) rad
4. \(1.0\) rad
1. 1.3 V
2. 0.5 V
3. 2.3 V
4. 1.8 V
1. Only (IV) does not represent SHM
2. (I) and (III)
3. (I) and (II)
4. Only (I)
The moment of inertia of a thin uniform rod of mass \(M\) and length \(L\) about an axis passing through its mid-point and perpendicular to its length is \(I_0\). Its moment of inertia about an axis passing through one of its ends and perpendicular to its length is:
1. \(I_0+\frac{ML^2}{4}\)
2. \(I_0+2ML^2\)
3. \(I_0+ML^2\)
4. \(I_0+\frac{ML^2}{2}\)
1. | the antimony becomes an acceptor atom |
2. | there will be more free electrons than holes in the semiconductor |
3. | its resistance is increased |
4. | it becomes a \(p\small{-}\)type semiconductor |
Sound waves travel at \(350\) m/s through warm air and at \(3500\) m/s through brass. The wavelength of a \(700\) Hz acoustic wave as it enters brass from warm air:
1. | increase by a factor of \(20\) |
2. | increase by a factor of \(10\) |
3. | decrease by a factor of \(20\) |
4. | decrease by a factor of \(10\) |
1. 1:2
2. 1:1
3. 1:5
4. 1:4
A current of 2 A flows through a 2 resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 resistor. The internal resistance of the battery is:
1. 1/3
2. 1/4
3. 1
4. 0.5
The electric and the magnetic fields, associated with an electromagnetic wave, propagating along the positive Z-axis, can be represented by:
1. \(\left [E=E_{0}\hat{k},~B=B_{0}\hat{i} \right ]\)
2. \(\left [E=E_{0}\hat{j},~B=B_{0}\hat{j} \right ]\)
3. \(\left [E=E_{0}\hat{j},~B=B_{0}\hat{k} \right ]\)
4. \(\left [E=E_{0}\hat{i},~B=B_{0}\hat{j} \right ]\)
A particle of mass \(m\) is released from rest and follows a parabolic path as shown. Assuming that the displacement of the mass from the origin is small, which graph correctly depicts the position of the particle as a function of time?
1. | 2. | ||
3. | 4. |
When \(1\) kg of ice at \(0^{\circ}\) C melts into the water at \(0^{\circ}\) C, the resulting change in its entropy, taking the latent heat of ice to be \(80\) cal/gm, is:
1. \(8\times 10^4\) cal/K
2. \(80\) cal/K
3. \(293\) cal/K
4. \(273\) cal/K
A planet moving along an elliptical orbit is closest to the sun at a distance r1 and farthest away at a distance of r2. If v1 and v2 are the linear velocities at these points respectively, then the ratio is:
1.
2.
3.
4.
1. | is zero. |
2. | depends upon the choice of the two materials of the thermocouple. |
3. | is negative. |
4. | is positive. |
1. | atoms get ionized at high temperature |
2. | kinetic energy is high enough to overcome the Coulomb repulsion between nuclei |
3. | molecules break up at high temperature |
4. | nuclei break up at high temperature |
A nucleus \({ }_{{n}}^{{m}} {X}\) emits one \(\alpha\text -\text{particle}\) and two \(\beta\text- \text{particle}\) The resulting nucleus is:
1. \(^{m-}{}_n^6 Z \)
2. \(^{m-}{}_{n}^{4} X \)
3. \(^{m-4}_{n-2}Y\)
4. \(^{m-6}_{n-4} Z \)
i. | \(A\) is feebly repelled. |
ii. | \(B\) is feebly attracted. |
iii. | \(C\) is strongly attracted. |
iv. | \(D\) remains unaffected. |
1. | \(C\) is of a diamagnetic material. |
2. | \(D\) is of a ferromagnetic material. |
3. | \(A\) is of a non-magnetic material. |
4. | \(B\) is of a paramagnetic material. |
During an isothermal expansion, a confined ideal gas does -150 J of work against its surrounding. This implies that:
1. | 300 J of heat has been added to the gas. |
2. | no heat is transferred because the process is isothermal. |
3. | 150 J of heat has been added to the gas. |
4. | 150 J of heat has been removed from the gas. |
1. decrease by 2 times
2. decrease by 4 times
3. increase by 4 times
4. increase by 2 times
1. | \(100~\text{mA}\) | 2. | \(200~\text{mA}\) |
3. | \(20~\text{mA}\) | 4. | \(10~\text{mA}\) |
1. | 20 m/s | 2. | 40 m/s |
3. | 5 m/s | 4. | 10 m/s |
A body projected vertically from the earth reaches a height equal to earth’s radius before returning to the earth. The power exerted by the gravitational force:
1. | is greatest at the instant just before the body hits the earth. |
2. | remains constant throughout. |
3. | is greatest at the instant just after the body is projected. |
4. | is greatest at the highest position of the body. |
Four electric charges \(+\mathrm q,\) \(+\mathrm q,\) \(-\mathrm q\) and \(-\mathrm q\) are placed at the corners of a square of side \(2\mathrm{L}\) (see figure). The electric potential at point A, mid-way between the two charges \(+\mathrm q\) and \(+\mathrm q\) is:
1.
2.
3. zero
4.
The dimensions of are:
1.
2.
3.
4.
A body is moving with a velocity of \(30\) m/s towards the east. After \(10\) s, its velocity becomes \(40\) m/s towards the north. The average acceleration of the body is:
1. \( 7 \mathrm{~m} / \mathrm{s}^2 \)
2. \( \sqrt{7} \mathrm{~m} / \mathrm{s}^2 \)
3. \( 5 \mathrm{~m} / \mathrm{s}^2 \)
4. \( 1 \mathrm{~m} / \mathrm{s}^2\)
1. | virtual, upright, height \(=0.5\) cm |
2. | real, inverted, height \(=4\) cm |
3. | real, inverted, height \(=1\) cm |
4. | virtual, upright, height \(=1\) cm |
1. | Difference between apparent and real depth of the pond |
2. | Mirage on hot summer days |
3. | Brilliance of the diamond |
4. | Working of optical fibre |
The potential energy of a system increases if work is done:
1. | by the system against a conservative force |
2. | by the system against a non-conservative force |
3. | upon the system by a conservative force |
4. | upon the system by a non-conservative force |
1. | the positive terminal of the battery is connected to the p-side and the depletion region becomes thick. |
2. | the negative terminal of the battery is connected to the n-side and the depletion region becomes thin. |
3. | the positive terminal of the battery is connected to the n-side and the depletion region becomes thin. |
4. | the negative terminal of the battery is connected to the p-side and the depletion region becomes thick. |
A missile is fired for a maximum range with an initial velocity of 20 m/s. If g= 10 m/s2, then the range of the missile will be:
1. 50 m
2. 60 m
3. 20 m
4. 40 m
The current \(i\) in a coil varies with time as shown in the figure. The variation of induced emf with time would be:
1. | 2. | ||
3. | 4. |
An AC voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to 3 , the phase difference between the applied voltage and the current in the circuit is:
1.
2.
3. zero
4.
Force \(F\) on a particle moving in a straight line varies with distance \(d\) as shown in the figure. The work done on the particle during its displacement of \(12\) m is:
1. \(21\) J
2. \(26\) J
3. \(13\) J
4. \(18\) J
A current-carrying closed loop in the form of a right isosceles triangle ABC is placed in a uniform magnetic field acting along with AB.
If the magnetic force on the arm BC is F, then what is the force on the arm AC?
1. | -F | 2. | F |
3. | 2F | 4. | -2F |
1. | gamma rays, ultraviolet, infrared, microwaves. |
2. | microwaves, gamma rays, infrared, ultraviolet. |
3. | infrared, microwave, ultraviolet, gamma rays. |
4. | microwave, infrared, ultraviolet, gamma rays. |
A transistor is operated in a common emitter configuration at Vc =2 V such that a change in the base current from 100 to 300 produces a change in the collector current from 10 mA to 20mA. The current gain is:
1. 75
2. 100
3. 25
4. 50
A body of mass \(M\) hits normally a rigid wall with velocity \(v\) and bounces back with the same velocity. The impulse experienced by the body is:
1. \(1.5Mv\)
2. \(2Mv\)
3. zero
4. \(Mv\)
A uniform electric field and a uniform magnetic field are acting in the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron:
1. speed will decrease
2. speed will increase
3. will turn towards the left of the direction of motion
4. will turn towards the right of the direction of motion