Q1
CHEMISTRY
Unit 2: Atomic Structure
The number of protons, neutrons and electrons in ^175_71Lu, respectively, are:
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- A. 175, 104 and 71
- B. 71, 104 and 71
- C. 104, 71 and 71
- D. 71, 71 and 104
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Q2
BIOLOGY
Unit 5: Human Physiology
The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and, with Na, is responsible for the transmission of nerve signals.
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- A. Potassium
- B. Iron
- C. Copper
- D. Calcium
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Q3
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is not correct about carbon monoxide?
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2020 (3 sets)
- A. It is produced due to incomplete combustion.
- B. It forms carboxyhaemoglobin.
- C. It reduces oxygen carrying ability of blood.
- D. The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.
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Q4
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Which one of the followings has maximum number of atoms?
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- A. 1 g of Li(s) [Atomic mass of Li = 7]
- B. 1 g of Ag(s) [Atomic mass of Ag = 108]
- C. 1 g of Mg(s) [Atomic mass of Mg = 24]
- D. 1 g of O2(g) [Atomic mass of O = 16]
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Q5
CHEMISTRY
Unit 5: Solutions
Paper chromatography is an example of:
- A. Column chromatography
- B. Adsorption chromatography
- C. Partition chromatography
- D. Thin layer chromatography
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Q6
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following is a natural polymer?
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- A. poly(butadiene-acrylonitrile)
- B. cis-1,4-polyisoprene
- C. poly(butadiene-styrene)
- D. polybutadiene
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Q6
CHEMISTRY
Unit 15: Hydrocarbons
Which of the following is a natural polymer?
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- A. Poly(butadiene-acrylonitrile)
- B. cis-1,4-polyisoprene
- C. Poly(butadiene-styrene)
- D. Polybutadiene
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Q7
CHEMISTRY
Unit 5: Solutions
The mixture which shows positive deviation from Raoult’s law is:
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- A. Chloroethane + bromoethane
- B. Ethanol + acetone
- C. Benzene + toluene
- D. Acetone + chloroform
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Q7
CHEMISTRY
Unit 5: Solutions
The mixture which shows positive deviation from Raoult’s law is:
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- A. Chloroethane + bromoethane
- B. Ethanol + acetone
- C. Benzene + toluene
- D. Acetone + chloroform
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Q8
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin-only magnetic moment of Cr3+ ion is:
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- A. 2.84 BM
- B. 3.87 BM
- C. 4.90 BM
- D. 5.92 BM
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Q8
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin-only magnetic moment of Cr3+ ion is:
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2020 (9 sets)
- A. 2.84 BM
- B. 3.87 BM
- C. 4.90 BM
- D. 5.92 BM
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Q9
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
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- A. Hyperconjugation
- B. −I effect of −CH3 groups
- C. +R effect of −CH3 groups
- D. −R effect of −CH3 groups
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Q9
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
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- A. Hyperconjugation
- B. −I effect of −CH3 groups
- C. +I effect of −CH3 groups
- D. −R effect of −CH3 groups
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Q10
CHEMISTRY
Unit 4: Chemical Thermodynamics
The correct option for free expansion of an ideal gas under adiabatic condition is:
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- A. q > 0, ΔT > 0 and w > 0
- B. q = 0, ΔT = 0 and w = 0
- C. q = 0, ΔT < 0 and w > 0
- D. q < 0, ΔT = 0 and w = 0
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Q10
PHYSICS
Unit 8: Thermodynamics
The correct option for free expansion of an ideal gas under adiabatic condition is:
- A. q > 0, ΔT > 0 and w > 0
- B. q = 0, ΔT = 0 and w = 0
- C. q = 0, ΔT < 0 and w > 0
- D. q < 0, ΔT = 0 and w = 0
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Q11
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Elimination reaction of 2-bromopentane to form pent-2-ene is:
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- A. (a), (b), (d)
- B. (a), (b), (c)
- C. (a), (c), (d)
- D. (b), (c), (d)
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Q11
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Elimination reaction of 2-bromopentane to form pent-2-ene is:
(a) β-Elimination reaction
(b) Follows Zaitsev rule
(c) Dehydrohalogenation reaction
(d) Dehydration reaction
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2020 (2 sets)
- A. (a), (b), (d)
- B. (a), (b), (c)
- C. (a), (c), (d)
- D. (b), (c), (d)
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Q12
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the correct statements from the following:
(a) CO2(g) is used as refrigerant for ice-cream and frozen food.
(b) The structure of C60 contains twelve six-membered rings and twenty five-ring carbons.
(c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(d) CO is a colorless and odourless gas.
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2020 (1 set)
- A. (c) and (d) only
- B. (a), (b) and (c) only
- C. (a) and (c) only
- D. (b) and (c) only
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Q13
CHEMISTRY
Unit 12: Coordination Compounds
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
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- A. CN− < CO < SCN− < F−
- B. SCN− < F− < CO < CN−
- C. SCN− < F− < CN− < CO
- D. F− < SCN− < CO < CN−
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Q14
CHEMISTRY
Unit 4: Chemical Thermodynamics
Hydrolysis of sucrose is given by the following reaction:
Sucrose + H2O ⇌ Glucose + Fructose
If the equilibrium constant (Kc) is 2 × 10^13 at 300 K, the value of ΔrG° at the same temperature will be:
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2020 (5 sets)
- A. −8.314 J mol−1 K−1 × 300 K × ln(4 × 10^13)
- B. −8.314 J mol−1 K−1 × 300 K × ln(2 × 10^13)
- C. 8.314 J mol−1 K−1 × 300 K × ln(2 × 10^13)
- D. 8.314 J mol−1 K−1 × 300 K × ln(3 × 10^13)
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Q15
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect match.
Name — IUPAC Official Name
(a) Unnilunium — (i) Mendelevium
(b) Unniltrium — (ii) Lawrencium
(c) Unnilhexium — (iii) Seaborgium
(d) Unununnium — (iv) Darmstadtium
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- A. (d), (iv)
- B. (a), (i)
- C. (b), (ii)
- D. (c), (iii)
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Q17
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the correct statement from the following:
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- A. Pig iron can be moulded into a variety of shapes.
- B. Wrought iron is impure iron with 4% carbon.
- C. Blister copper has blistered appearance due to evolution of CO2.
- D. Vapour phase refining is carried out for nickel by Van Arkel method.
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Q18
CHEMISTRY
Unit 4: Chemical Thermodynamics
For the reaction, 2Cl(g) → Cl2(g), the correct option is:
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- A. ΔrH < 0 and ΔrS < 0
- B. ΔrH > 0 and ΔrS > 0
- C. ΔrH > 0 and ΔrS < 0
- D. ΔrH < 0 and ΔrS > 0
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Q20
CHEMISTRY
Unit 12: Coordination Compounds
Match the following:
Oxide — Nature
(a) CO — (i) Basic
(b) BaO — (ii) Neutral
(c) Al2O3 — (iii) Acidic
(d) Cl2O7 — (iv) Amphoteric
Which of the following is the correct option?
- A. (iv), (iii), (ii), (i)
- B. (i), (ii), (iii), (iv)
- C. (ii), (i), (iv), (iii)
- D. (iii), (iv), (i), (ii)
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Q21
CHEMISTRY
Unit 12: Coordination Compounds
Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+(aq), deep blue colour solution C is formed. What is the formula of C from the following?
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- A. CuCO3·Cu(OH)2
- B. CuSO4
- C. [Cu(NH3)4]2+
- D. Cu(OH)2
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Q22
PHYSICS
Unit 12: Current Electricity
On electrolysis of dilute sulphuric acid using platinum (Pt) electrode, the product obtained at anode will be:
- A. SO2 gas
- B. Hydrogen gas
- C. Oxygen gas
- D. H2S gas
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Q23
PHYSICS
Unit 1: Physics and Measurement
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is:
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- A. \u221a4 × 288 pm / 2
- B. \u221a3 × 288 pm / 4
- C. \u221a2 × 288 pm / 4
- D. \u221a4 × 288 pm / 3
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Q24
CHEMISTRY
Unit 19: Biomolecules
Sucrose on hydrolysis gives:
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- A. α-D-Fructose + β-D-Fructose
- B. β-D-Glucose + α-D-Fructose
- C. α-D-Glucose + β-D-Glucose
- D. α-D-Glucose + β-D-Fructose
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Q24
CHEMISTRY
Unit 19: Biomolecules
Sucrose on hydrolysis gives:
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- A. α-D-Fructose + β-D-Fructose
- B. β-D-Glucose + α-D-Fructose
- C. α-D-Glucose + β-D-Glucose
- D. α-D-Glucose + β-D-Fructose
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Q25
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
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- A. Lysine
- B. Serine
- C. Alanine
- D. Tyrosine
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Q25
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
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- A. Lysine
- B. Serine
- C. Alanine
- D. Tyrosine
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Q26
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following set of molecules will have zero dipole moment?
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- A. Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
- B. Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
- C. Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
- D. Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
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Q26
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following set of molecules will have zero dipole moment?
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- A. Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
- B. Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
- C. Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
- D. Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
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Q27
CHEMISTRY
Unit 5: Solutions
The freezing point depression constant (Kf) of benzene is 5.12 K kg mol−1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off up to two decimal places):
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- A. 0.60 K
- B. 0.20 K
- C. 0.80 K
- D. 0.40 K
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Q27
CHEMISTRY
Unit 5: Solutions
The freezing point depression constant (Kf) of benzene is 5.12 K kg mol−1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):
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2020 (8 sets)
- A. 0.60 K
- B. 0.20 K
- C. 0.80 K
- D. 0.40 K
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Q28
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacid of sulphur has −O−O− linkage?
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- A. H2S2O7, pyrosulphuric acid
- B. H2SO3, sulphurous acid
- C. H2SO4, sulphuric acid
- D. H2S2O8, peroxodisulphuric acid
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Q28
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacid of sulphur has −O−O− linkage?
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2020 (8 sets)
- A. H2S2O7, pyrosulphuric acid
- B. H2SO3, sulphurous acid
- C. H2SO4, sulphuric acid
- D. H2S2O8, peroxodisulphuric acid
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Q29
CHEMISTRY
Unit 10: p-Block Elements
HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallise(s)?
- A. NaCl, MgCl2 and CaCl2
- B. Both MgCl2 and CaCl2
- C. Only NaCl
- D. Only MgCl2
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Q30
CHEMISTRY
Unit 6: Equilibrium
Measuring zeta potential is useful in determining which property of colloidal solution?
- A. Size of the colloidal particles
- B. Viscosity
- C. Solubility
- D. Stability of the colloidal particles
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Q31
CHEMISTRY
Unit 8: Chemical Kinetics
The rate constant for a first order reaction is 4.606 × 10−3 s−1. The time required to reduce 2.0 g of the reactant to 0.2 g is:
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- A. 1000 s
- B. 100 s
- C. 200 s
- D. 500 s
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Q32
CHEMISTRY
Unit 15: Hydrocarbons
Which of the following alkane cannot be made in good yield by Wurtz reaction?
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- A. n-Butane
- B. n-Hexane
- C. 2,3-Dimethylbutane
- D. n-Heptane
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Q33
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Match the following and identify the correct option.
(a) CO(g) + H2(g)
(b) Temporary hardness of water
(c) B2H6
(d) H2O2
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2020 (1 set)
- A. (i) Mg(HCO3)2 / Ca(HCO3)2, (iii) Synthesis gas, (ii) An electron deficient hydride, (iv) Non-planar structure
- B. (iii) Synthesis gas, (i) Mg(HCO3)2 / Ca(HCO3)2, (ii) An electron deficient hydride, (iv) Non-planar structure
- C. (iii) Synthesis gas, (ii) An electron deficient hydride, (i) Mg(HCO3)2 / Ca(HCO3)2, (iv) Non-planar structure
- D. (iii) Synthesis gas, (iv) Non-planar structure, (ii) An electron deficient hydride, (i) Mg(HCO3)2 / Ca(HCO3)2
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Q34
CHEMISTRY
Unit 6: Equilibrium
Find out the solubility of Ni(OH)2 in 0.1 M NaOH. Given that the ionic product of Ni(OH)2 is 2 × 10−15.
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2020 (8 sets)
- A. 1 × 10−8 M
- B. 2 × 10−13 M
- C. 2 × 10−8 M
- D. 1 × 10−13 M
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Q35
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Identify a molecule which does not exist.
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- A. O2
- B. He2
- C. Li2
- D. C2
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Q37
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect statement.
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- A. The oxidation states of chromium in CrO4^2− and Cr2O7^2− are not the same.
- B. Cr2+ (d4) is a stronger reducing agent than Fe2+ (d6) in water.
- C. The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.
- D. Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
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Q38
CHEMISTRY
Unit 8: Chemical Kinetics
An increase in the concentration of the reactants of a reaction leads to change in:
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- A. collision frequency
- B. activation energy
- C. heat of reaction
- D. threshold energy
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Q39
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
A mixture of N2 and Ar gases in a cylinder contains 7 g of N2 and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N2 is: [Use atomic masses (in g mol−1): N = 14, Ar = 40]
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- A. 18 bar
- B. 9 bar
- C. 12 bar
- D. 15 bar
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Q40
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
The number of Faradays required to produce 20 g of calcium from molten CaCl2 (Atomic mass of Ca = 40 g mol−1) is:
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- A. 4
- B. 1
- C. 2
- D. 3
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Q41
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as:
↻ Repeated question — also appeared in
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- A. Cross aldol condensation
- B. Aldol condensation
- C. Cannizzaro’s reaction
- D. Cross Cannizzaro’s reaction
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Q42
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
What is the change in oxidation number of carbon in the following reaction?
CH4(g) + 4Cl2(g) → CCl4(l) + 4HCl(g)
- A. 0 to −4
- B. +4 to +4
- C. 0 to +4
- D. −4 to +4
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Q42
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
What is the change in oxidation number of carbon in the following reaction?
CH4(g) + 4Cl2(g) → CCl4(l) + 4HCl(g)
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- A. 0 to −4
- B. +4 to +4
- C. 0 to +4
- D. −4 to +4
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Q44
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
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- A. Isobutyl alcohol
- B. Isopropyl alcohol
- C. Sec. butyl alcohol
- D. Tert. butyl alcohol
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Q44
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
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- A. Isobutyl alcohol
- B. Isopropyl alcohol
- C. Sec. butyl alcohol
- D. Tert. butyl alcohol
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Q45
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Which of the following is a cationic detergent?
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- A. Sodium dodecylbenzene sulphonate
- B. Sodium lauryl sulphate
- C. Sodium stearate
- D. Cetyltrimethyl ammonium bromide
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Q45
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
Which of the following is a cationic detergent?
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- A. Sodium dodecylbenzene sulphonate
- B. Sodium lauryl sulphate
- C. Sodium stearate
- D. Cetyltrimethyl ammonium bromide
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Q46
BIOLOGY
Unit 7: Genetics and Evolution
Flippers of penguins and dolphins are examples of:
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- A. Natural selection
- B. Adaptive radiation
- C. Convergent evolution
- D. Industrial melanism
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Q46
BIOLOGY
Unit 7: Genetics and Evolution
Flippers of penguins and dolphins are examples of:
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- A. Natural selection
- B. Adaptive radiation
- C. Convergent evolution
- D. Industrial melanism
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Q47
BIOLOGY
Unit 3: Cell Structure and Function
Some dividing cells exit the cell cycle and enter a vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of:
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- A. G2 phase
- B. M phase
- C. G1 phase
- D. S phase
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Q47
BIOLOGY
Unit 3: Cell Structure and Function
Some dividing cells exit the cell cycle and enter a vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of:
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- A. G2 phase
- B. M phase
- C. G1 phase
- D. S phase
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Q48
BIOLOGY
Unit 3: Cell Structure and Function
Match the following:
(a) Inhibitor of catalytic activity
(b) Possess peptide bonds
(c) Cell wall material in fungi
(d) Secondary metabolite
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2020 (1 set)
- A. (i) Ricin, (ii) Malonate, (iii) Chitin, (iv) Collagen
- B. (ii) Malonate, (iv) Collagen, (iii) Chitin, (i) Ricin
- C. (ii) Malonate, (iv) Collagen, (i) Ricin, (iii) Chitin
- D. (iv) Collagen, (i) Ricin, (iii) Chitin, (ii) Malonate
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Q48
BIOLOGY
Unit 1: Diversity in Living World
Match the following:
(a) Inhibitor of catalytic activity
(b) Possess peptide bonds
(c) Cell wall material in fungi
(d) Secondary metabolite
Choose the correct option from the following:
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2020 (2 sets)
- A. (ii)(iii)(i)(iv)
- B. (ii)(iv)(iii)(i)
- C. (iii)(i)(iv)(ii)
- D. (iii)(iv)(i)(ii)
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Q49
BIOLOGY
Unit 1: Diversity in Living World
Floridean starch has structure similar to:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Laminarin and cellulose
- B. Starch and cellulose
- C. Amylopectin and glycogen
- D. Mannitol and algin
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Q50
BIOLOGY
Unit 4: Plant Physiology
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Effect on reproduction
- B. Nutritive value
- C. Growth response
- D. Defence action
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Q51
BIOLOGY
Unit 6: Reproduction
If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 10^9 bp, then the length of the DNA is approximately:
- A. 2.7 meters
- B. 2.0 meters
- C. 2.5 meters
- D. 2.2 meters
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Q52
BIOLOGY
Unit 4: Plant Physiology
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Plasmolysis
- B. Transpiration
- C. Root pressure
- D. Imbibition
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Q53
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
- A. Allele ‘i’ does not produce any sugar.
- B. The gene I has three alleles.
- C. A person will have only two of the three alleles.
- D. When I_A and I_B are present together, they express the same type of sugar.
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Q54
BIOLOGY
Unit 6: Reproduction
Dissolution of the synaptonemal complex occurs during:
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Leptotene
- B. Pachytene
- C. Zygotene
- D. Diplotene
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Q55
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is put into anaerobic sludge digester for further sewage treatment?
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Activated sludge
- B. Primary sludge
- C. Floating debris
- D. Effluents of primary treatment
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Q56
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements are true for the phylum Chordata?
(a) In Urochordata notochord extends from head to tail and is present throughout life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. (b) and (c)
- B. (d) and (c)
- C. (c) and (a)
- D. (a) and (b)
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Q57
BIOLOGY
Unit 5: Human Physiology
Select the option including all sexually transmitted diseases.
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Cancer, AIDS, Syphilis
- B. Gonorrhoea, Syphilis, Genital herpes
- C. Gonorrhoea, Malaria, Genital herpes
- D. AIDS, Malaria, Filaria
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Q58
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Cuboidal epithelium with brush border of microvilli is found in:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Eustachian tube
- B. Lining of intestine
- C. Ducts of salivary glands
- D. Proximal convoluted tubule of nephron
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Q59
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The transverse section of a plant shows the following anatomical features:
(a) Large number of scattered vascular bundles surrounded by bundle sheath.
(b) Large conspicuous parenchymatous ground tissue.
(c) Vascular bundles conjoint and closed.
(d) Phloem parenchyma absent.
Identify the category of plant and its part:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Dicotyledonous root
- B. Monocotyledonous stem
- C. Monocotyledonous root
- D. Dicotyledonous stem
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Q60
BIOLOGY
Unit 7: Genetics and Evolution
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
- A. Inbreeding
- B. Out crossing
- C. Mutational breeding
- D. Cross breeding
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Q60
BIOLOGY
Unit 6: Reproduction
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Inbreeding
- B. Out crossing
- C. Mutational breeding
- D. Cross breeding
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Q61
BIOLOGY
Unit 10: Ecology and Environment
Montreal protocol was signed in 1987 for control of:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Disposal of e-wastes
- B. Transport of genetically modified organisms from one country to another
- C. Emission of ozone depleting substances
- D. Release of greenhouse gases
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Q61
BIOLOGY
Unit 10: Ecology and Environment
Montreal Protocol was signed in 1987 for control of:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Disposal of e-wastes
- B. Transport of genetically modified organisms from one country to another
- C. Emission of ozone depleting substances
- D. Release of greenhouse gases
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Q62
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the following columns and select the correct option.
Column I Column II
(a) Bt cotton (i) Gene therapy
(b) Adenosine deaminase deficiency (ii) Cellular defence
(c) RNAi (iii) Detection of HIV infection
(d) PCR (iv) Bacillus thuringiensis
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- B. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- C. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- D. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
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Q62
PHYSICS
Unit 3: Laws of Motion
Match the following columns and select the correct option.
Column I
(a) Bt cotton
(b) Adenosine deaminase deficiency
(c) RNAi
(d) PCR
Column II
(i) Gene therapy
(ii) Cellular defence
(iii) Detection of HIV infection
(iv) Bacillus thuringiensis
- A. (i)(ii)(iii)(iv)
- B. (iv)(i)(ii)(iii)
- C. (iii)(ii)(i)(iv)
- D. (ii)(iii)(iv)(i)
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Q63
BIOLOGY
Unit 10: Ecology and Environment
According to Robert May, the global species diversity is about:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 7 million
- B. 1.5 million
- C. 20 million
- D. 50 million
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Q63
BIOLOGY
Unit 10: Ecology and Environment
According to Robert May, the global species diversity is about:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 7 million
- B. 1.5 million
- C. 20 million
- D. 50 million
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Q64
BIOLOGY
Unit 9: Biotechnology and Its Applications
Choose the correct pair from the following:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Exonucleases – Make cuts at specific positions within DNA
- B. Ligases – Join the two DNA molecules
- C. Polymerases – Break the DNA into fragments
- D. Nucleases – Separate the two strands of DNA
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Q65
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the wrong statement with regard to restriction enzymes.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Sticky ends can be joined by using DNA ligases.
- B. Each restriction enzyme functions by inspecting the length of a DNA sequence.
- C. They cut the strand of DNA at palindromic sites.
- D. They are useful in genetic engineering.
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Q66
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the organism with its use in biotechnology.
Column I Column II
(a) Bacillus thuringiensis (i) Cloning vector
(b) Thermus aquaticus (ii) Construction of first rDNA molecule
(c) Agrobacterium tumefaciens (iii) DNA polymerase
(d) Salmonella typhimurium (iv) Cry proteins
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- B. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
- C. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- D. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
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Q67
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option.
Column I Column II
(a) Organ of Corti (i) Connects middle ear and pharynx
(b) Cochlea (ii) Coiled part of the labyrinth
(c) Eustachian tube (iii) Attached to the oval window
(d) Stapes (iv) Located on the basilar membrane
↻ Repeated question — also appeared in
2020 (1 set)
- A. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
- B. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
- C. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- D. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
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Q68
BIOLOGY
Unit 5: Human Physiology
The QRS complex in a standard ECG represents:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Repolarisation of ventricles
- B. Repolarisation of auricles
- C. Depolarisation of auricles
- D. Depolarisation of ventricles
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Q69
CHEMISTRY
Unit 19: Biomolecules
Identify the substances having glycosidic bond and peptide bond, respectively, in their structure:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Inulin, insulin
- B. Chitin, cholesterol
- C. Glycerol, trypsin
- D. Cellulose, lecithin
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Q70
BIOLOGY
Unit 10: Ecology and Environment
Which of the following regions of the globe exhibits highest species diversity?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Amazon forests
- B. Western Ghats of India
- C. Madagascar
- D. Himalayas
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Q71
BIOLOGY
Unit 6: Reproduction
Match the following columns and select the correct option.
Column I Column II
(a) Placenta (i) Androgens
(b) Zona pellucida (ii) Human Chorionic Gonadotropin (hCG)
(c) Bulbo-urethral glands (iii) Layer of the ovum
(d) Leydig cells (iv) Lubrication of the penis
↻ Repeated question — also appeared in
2020 (5 sets)
- A. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- B. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- C. (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
- D. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
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Q72
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option.
Column I Column II
(a) Pituitary gland (i) Grave’s disease
(b) Thyroid gland (ii) Diabetes mellitus
(c) Adrenal gland (iii) Diabetes insipidus
(d) Pancreas (iv) Addison’s disease
↻ Repeated question — also appeared in
2020 (3 sets)
- A. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
- B. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- C. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- D. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
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Q73
BIOLOGY
Unit 4: Plant Physiology
Which of the following is not an inhibitory substance governing seed dormancy?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Para-ascorbic acid
- B. Gibberellic acid
- C. Abscisic acid
- D. Phenolic acid
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Q74
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
If the head of cockroach is removed, it may live for few days because:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.
- B. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
- C. the cockroach does not have nervous system.
- D. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
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Q75
BIOLOGY
Unit 5: Human Physiology
The number of substrate level phosphorylations in one turn of citric acid cycle is:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Three
- B. Zero
- C. One
- D. Two
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Q75
BIOLOGY
Unit 4: Plant Physiology
The number of substrate-level phosphorylations in one turn of citric acid cycle is:
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Three
- B. Zero
- C. One
- D. Two
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Q76
BIOLOGY
Unit 7: Genetics and Evolution
The process of growth is maximum during:
- A. Dormancy
- B. Log phase
- C. Lag phase
- D. Senescence
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Q76
BIOLOGY
Unit 10: Ecology and Environment
The process of growth is maximum during:
↻ Repeated question — also appeared in
2020 (1 set)
- A. Dormancy
- B. Log phase
- C. Lag phase
- D. Senescence
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Q77
BIOLOGY
Unit 7: Genetics and Evolution
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 8
- B. 4
- C. 2
- D. 14
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Q77
BIOLOGY
Unit 6: Reproduction
How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
- A. 8
- B. 4
- C. 2
- D. 14
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Q78
BIOLOGY
Unit 9: Biotechnology and Its Applications
In gel electrophoresis, separated DNA fragments can be visualized with the help of:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Ethidium bromide in infrared radiation
- B. Acetocarmine in bright blue light
- C. Ethidium bromide in UV radiation
- D. Acetocarmine in UV radiation
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Q78
BIOLOGY
Unit 6: Reproduction
In gel electrophoresis, separated DNA fragments can be visualized with the help of:
↻ Repeated question — also appeared in
2020 (1 set)
- A. Ethidium bromide in infrared radiation
- B. Acetocarmine in bright blue light
- C. Ethidium bromide in UV radiation
- D. Acetocarmine in UV radiation
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Q79
CHEMISTRY
Unit 19: Biomolecules
Identify the basic amino acid from the following.
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Valine
- B. Tyrosine
- C. Glutamic acid
- D. Lysine
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Q79
BIOLOGY
Unit 5: Human Physiology
Identify the basic amino acid from the following.
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Valine
- B. Tyrosine
- C. Glutamic acid
- D. Lysine
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Q80
BIOLOGY
Unit 6: Reproduction
Match the following with respect to meiosis:
(a) Zygotene
(b) Pachytene
(c) Diplotene
(d) Diakinesis
Select the correct option from the following:
(a) (b) (c) (d)
↻ Repeated question — also appeared in
2020 (3 sets)
- A. (ii)(iv)(iii)(i)
- B. (iii)(iv)(i)(ii)
- C. (iv)(iii)(ii)(i)
- D. (i)(ii)(iv)(iii)
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Q81
BIOLOGY
Unit 5: Human Physiology
Match the following diseases with the causative organism and select the correct option.
Column I Column II
(a) Typhoid
(b) Pneumonia
(c) Filariasis
(d) Malaria
- A. (iv)(i)(ii)(iii)
- B. (i)(iii)(ii)(iv)
- C. (iii)(iv)(i)(ii)
- D. (ii)(i)(iii)(iv)
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Q82
BIOLOGY
Unit 4: Plant Physiology
Match the following concerning essential elements and their functions in plants:
(a) Iron
(b) Zinc
(c) Boron
(d) Manganese
↻ Repeated question — also appeared in
2020 (1 set)
- A. (iv)(i)(ii)(iii)
- B. (ii)(i)(iv)(iii)
- C. (iv)(iii)(ii)(i)
- D. (iii)(iv)(ii)(i)
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Q83
BIOLOGY
Unit 5: Human Physiology
Which of the following would help in prevention of diuresis?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Decrease in secretion of renin by JG cells
- B. More water reabsorption due to undersecretion of ADH
- C. Reabsorption of Na+ and water from renal tubules due to aldosterone
- D. Atrial natriuretic factor causes vasoconstriction
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Q84
BIOLOGY
Unit 8: Biology and Human Welfare
Snow-blindness in Antarctic region is due to:
↻ Repeated question — also appeared in
2020 (1 set)
- A. Damage to retina caused by infra-red rays
- B. Freezing of fluids in the eye by low temperature
- C. Inflammation of cornea due to high dose of UV-B radiation
- D. High reflection of light from snow
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Q85
BIOLOGY
Unit 9: Biotechnology and Its Applications
Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Insect predators
- B. Insect pests
- C. Fungal diseases
- D. Plant nematodes
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Q86
BIOLOGY
Unit 5: Human Physiology
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra-pulmonary pressure increases
↻ Repeated question — also appeared in
2020 (6 sets)
- A. only (d)
- B. (a) and (b)
- C. (c) and (d)
- D. (a), (b) and (d)
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Q87
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is correct about viroids?
- A. They have free DNA without protein coat.
- B. They have RNA with protein coat.
- C. They have free RNA without protein coat.
- D. They have DNA with protein coat.
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Q88
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Match the following columns and select the correct option.
Column I Column II
(a) Floating ribs
(b) Acromion
(c) Scapula
(d) Glenoid cavity
- A. (iv)(iii)(i)(ii)
- B. (ii)(iv)(i)(iii)
- C. (i)(iii)(ii)(iv)
- D. (iii)(ii)(iv)(i)
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Q89
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
Column I Column II
(a) Gregarious, polyphagous
(b) Adult with radial symmetry and larva with bilateral symmetry
(c) Book lungs
(d) Bioluminescence
↻ Repeated question — also appeared in
2020 (1 set)
- A. (ii)(i)(iii)(iv)
- B. (i)(iii)(ii)(iv)
- C. (iv)(i)(ii)(iii)
- D. (iii)(ii)(i)(iv)
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Q90
BIOLOGY
Unit 1: Diversity in Living World
Ray florets have:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Half inferior ovary
- B. Inferior ovary
- C. Superior ovary
- D. Hypogynous ovary
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Q90
BIOLOGY
Unit 1: Diversity in Living World
Ray florets have:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Half inferior ovary
- B. Inferior ovary
- C. Superior ovary
- D. Hypogynous ovary
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Q91
BIOLOGY
Unit 6: Reproduction
In which of the following techniques are the embryos transferred to assist those females who cannot conceive?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. GIFT and ICSI
- B. ZIFT and IUT
- C. GIFT and ZIFT
- D. ICSI and ZIFT
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Q91
BIOLOGY
Unit 6: Reproduction
In which of the following techniques are embryos transferred to assist those females who cannot conceive?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. GIFT and ICSI
- B. ZIFT and IUT
- C. GIFT and ZIFT
- D. ICSI and ZIFT
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Q92
BIOLOGY
Unit 8: Biology and Human Welfare
Match the following columns and select the correct option.
Column I Column II
(a) Clostridium butylicum
(b) Trichoderma polysporum
(c) Monascus purpureus
(d) Aspergillus niger
- A. (iv)(iii)(ii)(i)
- B. (iii)(iv)(ii)(i)
- C. (ii)(i)(iv)(iii)
- D. (i)(ii)(iv)(iii)
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Q92
BIOLOGY
Unit 8: Biology and Human Welfare
Match the following columns and select the correct option.
Column I Column II
(a) Clostridium butylicum (i) Cyclosporin-A
(b) Trichoderma polysporum (ii) Butyric acid
(c) Monascus purpureus (iii) Citric acid
(d) Aspergillus niger (iv) Blood cholesterol lowering agent
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (iv)(iii)(ii)(i)
- B. (iii)(iv)(ii)(i)
- C. (ii)(i)(iv)(iii)
- D. (i)(ii)(iv)(iii)
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Q93
BIOLOGY
Unit 6: Reproduction
The plant parts which consist of two generations, one within the other, are:
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule
↻ Repeated question — also appeared in
2020 (6 sets)
- A. (a) and (d)
- B. (a) only
- C. (a), (b) and (c)
- D. (c) and (d)
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Q93
BIOLOGY
Unit 6: Reproduction
The plant parts which consist of two generations, one within the other, are:
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule
↻ Repeated question — also appeared in
2020 (6 sets)
- A. (a) and (d)
- B. (a) only
- C. (a), (b) and (c)
- D. (c) and (d)
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Q94
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is not an attribute of a population?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Species interaction
- B. Sex ratio
- C. Natality
- D. Mortality
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Q95
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
The sequence that controls the copy number of the linked DNA in the vector is termed:
- A. Recognition site
- B. Selectable marker
- C. Ori site
- D. Palindromic sequence
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Q96
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
The specific palindromic sequence recognized by EcoRI is:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. 5' - GGATCC - 3' 3' - CCTAGG - 5'
- B. 5' - GAATTC - 3' 3' - CTTAAG - 5'
- C. 5' - GGAACC - 3' 3' - CCTTGG - 5'
- D. 5' - CTTAAG - 3' 3' - GAATTC - 5'
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Q97
BIOLOGY
Unit 7: Genetics and Evolution
Experimental verification of the chromosomal theory of inheritance was done by:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Morgan
- B. Mendel
- C. Sutton
- D. Boveri
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Q98
BIOLOGY
Unit 4: Plant Physiology
The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Ammonia and hydrogen
- B. Ammonia alone
- C. Nitrate alone
- D. Ammonia and oxygen
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Q99
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
Column I Column II
(a) 6 - 15 pairs of gill slits (i) Trygon
(b) Heterocercal caudal fin (ii) Cyclostomes
(c) Air bladder (iii) Chondrichthyes
(d) Poison sting (iv) Osteichthyes
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2020 (3 sets)
- A. (i)(iv)(iii)(ii)
- B. (ii)(iii)(iv)(i)
- C. (iii)(iv)(i)(ii)
- D. (iv)(ii)(iii)(i)
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Q100
BIOLOGY
Unit 3: Cell Structure and Function
Identify the incorrect statement.
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2020 (1 set)
- A. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour.
- B. Heart wood does not conduct water but gives mechanical support.
- C. Sapwood is involved in conduction of water and minerals from root to leaf.
- D. Sapwood is the innermost secondary xylem and is lighter in colour.
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Q101
BIOLOGY
Unit 4: Plant Physiology
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
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2020 (1 set)
- A. There is no relationship between Gross primary productivity and Net primary productivity.
- B. Gross primary productivity is always less than net primary productivity.
- C. Gross primary productivity is always more than net primary productivity.
- D. Gross primary productivity and Net primary productivity are one and same.
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Q102
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?
(a) Darwin’s finches of Galapagos islands
(b) Herbicide resistant weeds
(c) Drug resistant eukaryotes
(d) Man-created breeds of domesticated animals like dogs
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2020 (6 sets)
- A. only (d)
- B. only (a)
- C. (a) and (c)
- D. (b), (c) and (d)
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Q103
BIOLOGY
Unit 6: Reproduction
Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?
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2020 (4 sets)
- A. Low concentration of FSH
- B. High concentration of Estrogen
- C. High concentration of Progesterone
- D. Low concentration of LH
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Q104
BIOLOGY
Unit 4: Plant Physiology
In light reaction, plastoquinone facilitates the transfer of electrons from:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. PS-I to ATP synthase
- B. PS-II to Cyt b6f complex
- C. Cyt b6f complex to PS-I
- D. PS-I to NADP+
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Q105
CHEMISTRY
Unit 19: Biomolecules
Which of the following statements is not correct?
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2020 (2 sets)
- A. Genetically engineered insulin is produced in E. coli.
- B. In man insulin is synthesised as a proinsulin.
- C. The proinsulin has an extra peptide called C-peptide.
- D. The functional insulin has A and B chains linked together by hydrogen bonds.
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Q105
BIOLOGY
Unit 6: Reproduction
Which of the following statements is not correct?
↻ Repeated question — also appeared in
2020 (1 set)
- A. Genetically engineered insulin is produced in E. coli.
- B. In man, insulin is synthesised as a proinsulin.
- C. The proinsulin has an extra peptide called C-peptide.
- D. The functional insulin has A and B chains linked together by hydrogen bonds.
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Q106
BIOLOGY
Unit 1: Diversity in Living World
From his experiments, S. L. Miller produced amino acids by mixing the following in a closed flask:
- A. CH4, H2, NH3 and water vapour at 600°C
- B. CH4, H2, NH3 and water vapour at 800°C
- C. CH3, H2, NH4 and water vapour at 800°C
- D. CH4, H2, NH3 and water vapour at 600°C
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Q106
BIOLOGY
Unit 10: Ecology and Environment
From his experiments, S. L. Miller produced amino acids by mixing the following in a closed flask:
↻ Repeated question — also appeared in
2020 (1 set)
- A. CH4, H2, NH3 and water vapour at 600°C
- B. CH4, H2, NH3 and water vapour at 800°C
- C. CH3, H2, NH4 and water vapour at 800°C
- D. CH4, H2, NH3 and water vapour at 600°C
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Q107
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Thalassemia - X linked
- B. Haemophilia - Y linked
- C. Phenylketonuria - Autosomal dominant trait
- D. Sickle cell anaemia - Autosomal recessive trait, chromosome-11
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Q136
PHYSICS
Unit 10: Oscillations and Waves
In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be:
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2020 (7 sets)
- A. 537 Hz
- B. 523 Hz
- C. 524 Hz
- D. 536 Hz
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Q137
PHYSICS
Unit 11: Electrostatics
The capacitance of a parallel plate capacitor with air as medium is 6 µF. With the introduction of a dielectric medium, the capacitance becomes 30 µF. The permittivity of the medium is (ε0 = 8.85 × 10^-12 C^2 N^-1 m^-2).
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 5.00 C^2 N^-1 m^-2
- B. 0.44 × 10^-13 C^2 N^-1 m^-2
- C. 1.77 × 10^-12 C^2 N^-1 m^-2
- D. 0.44 × 10^-10 C^2 N^-1 m^-2
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Q138
PHYSICS
Unit 10: Oscillations and Waves
The phase difference between displacement and acceleration of a particle in simple harmonic motion is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. zero
- B. π rad
- C. 3π/2 rad
- D. π/2 rad
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Q139
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. zero
- B. doubled
- C. four times
- D. one-fourth
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Q140
PHYSICS
Unit 11: Electrostatics
A spherical conductor of radius 10 cm has a charge of 3.2 × 10^-7 C distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere? Given 1/(4πϵ0) = 9 × 10^9 N m^2/C^2.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 1.28 × 10^7 N/C
- B. 1.28 × 10^4 N/C
- C. 1.28 × 10^5 N/C
- D. 1.28 × 10^6 N/C
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Q142
PHYSICS
Unit 19: Electronic Devices
For transistor action, which of the following statements is correct?
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2020 (7 sets)
- A. The base region must be very thin and lightly doped.
- B. Base, emitter and collector regions should have same doping concentrations.
- C. Base, emitter and collector regions should have same size.
- D. Both emitter junction as well as the collector junction are forward biased.
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Q143
PHYSICS
Unit 9: Kinetic Theory of Gases
The average thermal energy for a monoatomic gas is (kB is Boltzmann constant and T is absolute temperature):
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 7/2 kB T
- B. 1/2 kB T
- C. 3/2 kB T
- D. 5/2 kB T
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Q144
PHYSICS
Unit 11: Electrostatics
In a certain region of space with volume 0.2 m^3, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 5 N/C
- B. zero
- C. 0.5 N/C
- D. 1 N/C
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Q145
PHYSICS
Unit 7: Properties of Solids and Liquids
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 20.0 g
- B. 2.5 g
- C. 5.0 g
- D. 10.0 g
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Q146
PHYSICS
Unit 5: Rotational Motion
Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The centre of mass of the system from the 5 kg particle is nearly at a distance of:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 80 cm
- B. 33 cm
- C. 50 cm
- D. 67 cm
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Q147
PHYSICS
Unit 8: Thermodynamics
Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. isobaric
- B. isothermal
- C. adiabatic
- D. isochoric
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Q148
PHYSICS
Unit 18: Atoms and Nuclei
The energy required to break one bond in DNA is 10^-20 J. This value in eV is nearly:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 0.006
- B. 6
- C. 0.6
- D. 0.06
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Q149
PHYSICS
Unit 2: Kinematics
A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is (g = 10 m/s^2):
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 300 m
- B. 360 m
- C. 340 m
- D. 320 m
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Q151
PHYSICS
Unit 19: Electronic Devices
The solids which have the negative temperature coefficient of resistance are:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. insulators and semiconductors
- B. metals
- C. insulators only
- D. semiconductors only
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Q152
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is 1.227×10^-2 nm, the potential difference is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 10^4 V
- B. 10 V
- C. 10^2 V
- D. 10^3 V
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Q153
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is (μ0 = 4π×10^-7 T m A^-1):
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 3.14×10^-5 T
- B. 6.28×10^-4 T
- C. 3.14×10^-4 T
- D. 6.28×10^-5 T
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Q154
PHYSICS
Unit 15: Electromagnetic Waves
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is (c = speed of electromagnetic waves):
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 1 : c^2
- B. c : 1
- C. 1 : 1
- D. 1 : c
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Q155
PHYSICS
Unit 11: Electrostatics
A short electric dipole has a dipole moment of 16×10^-9 C m. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of 60° with the dipole axis is (1/4πϵ0 = 9×10^9 N m^2/C^2):
↻ Repeated question — also appeared in
2020 (8 sets)
- A. zero
- B. 50 V
- C. 200 V
- D. 400 V
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Q156
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m^-1. The permeability of the material of the rod is (μ0 = 4π×10^-7 T m A^-1):
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 2.4π×10^-7 T m A^-1
- B. 2.4π×10^-4 T m A^-1
- C. 8.0×10^-5 T m A^-1
- D. 2.4π×10^-5 T m A^-1
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Q157
PHYSICS
Unit 6: Gravitation
A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 24 N
- B. 48 N
- C. 32 N
- D. 30 N
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Q157
PHYSICS
Unit 6: Gravitation
A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 24 N
- B. 48 N
- C. 32 N
- D. 30 N
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Q158
PHYSICS
Unit 20: Experimental Skills
A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is:
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2020 (6 sets)
- A. 1.0 mm
- B. 0.01 mm
- C. 0.25 mm
- D. 0.5 mm
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Q159
PHYSICS
Unit 7: Properties of Solids and Liquids
The quantities of heat required to raise the temperature of two solid copper spheres of radii r1 and r2 (r1 = 1.5 r2) through 1 K are in the ratio:
↻ Repeated question — also appeared in
2020 (3 sets)
- A. 5/3
- B. 27/8
- C. 9/4
- D. 3/2
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Q160
PHYSICS
Unit 3: Laws of Motion
Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. g/10
- B. g
- C. g/2
- D. g/5
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Q161
PHYSICS
Unit 16: Optics
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of a telescope whose objective has a diameter of 2 m is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 6.00×10^-7 rad
- B. 3.66×10^-7 rad
- C. 1.83×10^-7 rad
- D. 7.32×10^-7 rad
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Q162
PHYSICS
Unit 19: Electronic Devices
The increase in the width of the depletion region in a p-n junction diode is due to:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. increase in forward current
- B. forward bias only
- C. reverse bias only
- D. both forward bias and reverse bias
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Q163
PHYSICS
Unit 1: Physics and Measurement
Light with an average flux of 20 W/cm^2 falls on a non-reflecting surface at normal incidence having surface area 20 cm^2. The energy received by the surface during a time span of 1 minute is:
- A. 48×10^3 J
- B. 10×10^3 J
- C. 12×10^3 J
- D. 24×10^3 J
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Q164
PHYSICS
Unit 9: Kinetic Theory of Gases
The mean free path for a gas, with molecular diameter d and number density n can be expressed as:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 1/(2√2 π n d^2)
- B. 1/(2 π n d^2)
- C. 2/(π n d^2)
- D. 1/(2 n d^2)
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Q165
PHYSICS
Unit 8: Thermodynamics
A 40 μF capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly:
- A. 25.1 A
- B. 1.7 A
- C. 2.05 A
- D. 2.5 A
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Q167
PHYSICS
Unit 20: Experimental Skills
A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to L1 when mass M is suspended from its free end. The expression for Young’s modulus is:
- A. MgL / A(L1 − L)
- B. MgL / AL1
- C. Mg(L1 − L) / AL
- D. MgL / AL
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Q169
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is π/3. If instead C is removed from the circuit, the phase difference is again π/3 between current and voltage. The power factor of the circuit is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. -1.0
- B. zero
- C. 0.5
- D. 1.0
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Q170
PHYSICS
Unit 1: Physics and Measurement
Dimensions of stress are:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. [M L^-1 T^-2]
- B. [M L T^-2]
- C. [M L^2 T^-2]
- D. [M L^0 T^-2]
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Q171
PHYSICS
Unit 9: Kinetic Theory of Gases
A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 278°C. Its density is: (R = 8.3 J mol^-1 K^-1)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 0.02 kg/m^3
- B. 0.5 kg/m^3
- C. 0.2 kg/m^3
- D. 0.1 kg/m^3
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Q172
PHYSICS
Unit 5: Rotational Motion
Find the torque about the origin when a force of 3 N ĵ acts on a particle whose position vector is 2 m k̂.
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2020 (7 sets)
- A. 6 N m k̂
- B. 6 N m î
- C. 6 N m ĵ
- D. -6 N m î
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Q173
PHYSICS
Unit 18: Atoms and Nuclei
For which one of the following, Bohr model is not valid?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Singly ionised neon atom (Ne+)
- B. Hydrogen atom
- C. Singly ionised helium atom (He+)
- D. Deuteron atom
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Q174
PHYSICS
Unit 18: Atoms and Nuclei
When a uranium isotope 23592U is bombarded with a neutron, it generates 8936Kr, three neutrons and:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 10336Kr
- B. 14456Ba
- C. 9140Zr
- D. 11036Kr
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Q175
PHYSICS
Unit 1: Physics and Measurement
Taking into account of the significant figures, what is the value of 9.99 m − 0.0099 m?
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2020 (7 sets)
- A. 9.9 m
- B. 9.9801 m
- C. 9.98 m
- D. 9.980 m
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Q176
PHYSICS
Unit 16: Optics
The Brewster's angle ib for an interface should be:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. ib = 90°
- B. 0° < ib < 30°
- C. 30° < ib < 45°
- D. 45° < ib < 90°
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Q177
PHYSICS
Unit 12: Current Electricity
A charged particle having drift velocity of 7.5×10^-4 m s^-1 in an electric field of 3×10^-10 V m^-1, has a mobility in m^2 V^-1 s^-1 of:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. 2.25×10^-15
- B. 2.25×10^15
- C. 2.5×10^6
- D. 2.5×10^-6
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Q177
PHYSICS
Unit 12: Current Electricity
A charged particle having drift velocity of 7.5 × 10^-4 m s^-1 in an electric field of 3 × 10^-10 V m^-1 has a mobility in m^2 V^-1 s^-1 of:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. 2.25 × 10^-15
- B. 2.25 × 10^15
- C. 2.5 × 10^6
- D. 2.5 × 10^-6
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Q178
PHYSICS
Unit 10: Oscillations and Waves
In Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:
- A. one-fourth
- B. double
- C. half
- D. four times
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Q178
PHYSICS
Unit 16: Optics
In Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. one-fourth
- B. double
- C. half
- D. four times
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Q179
PHYSICS
Unit 20: Experimental Skills
A resistance wire connected in the left gap of a metre bridge balances a 10 Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3 : 2. If the length of the resistance wire is 1.5 m, then the length of 1 Ω of the resistance wire is:
↻ Repeated question — also appeared in
2020 (1 set)
- A. 1.5 × 10^-2 m
- B. 1.0 × 10^-2 m
- C. 1.0 × 10^-1 m
- D. 1.5 × 10^-1 m
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Q180
PHYSICS
Unit 16: Optics
A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ, then the angle of incidence is nearly equal to:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. A/(2μ)
- B. A/(2μ)
- C. 2A/μ
- D. μA
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Q180
PHYSICS
Unit 16: Optics
A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ, then the angle of incidence is nearly equal to:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. A / (2μ)
- B. A / (2μ)
- C. 2A / μ
- D. μA
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