Q1
CHEMISTRY
Unit 10: p-Block Elements
Which of the following statements is not true for halogens?
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2018 (15 sets)
- A. All form monobasic oxyacids.
- B. Chlorine has the highest electron-gain enthalpy.
- C. All but fluorine show positive oxidation states.
- D. All are oxidizing agents.
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Q2
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
The correct order of atomic radii in group 13 elements is
↻ Repeated question — also appeared in
2018 (12 sets)
- A. B < Al < In < Ga < Tl
- B. B < Ga < Al < In < Tl
- C. B < Ga < Al < Tl < In
- D. B < Al < Ga < In < Tl
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Q3
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
In the structure of ClF₃, the number of lone pairs of electrons on the central atom 'Cl' is
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2018 (13 sets)
- A. one
- B. three
- C. four
- D. two
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Q4
CHEMISTRY
Unit 10: p-Block Elements
The correct order of N-compounds in its decreasing order of oxidation states is
↻ Repeated question — also appeared in
2018 (10 sets)
- A. HNO₃, NO, N₂, NH₄Cl
- B. NH₄Cl, N₂, NO, HNO₃
- C. HNO₃, NH₄Cl, NO, N₂
- D. HNO₃, NO, NH₄Cl, N₂
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Q5
CHEMISTRY
Unit 10: p-Block Elements
Which one of the following elements is unable to form MF₆³⁻ ion?
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2018 (14 sets)
- A. Ga
- B. In
- C. B
- D. Al
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Q6
CHEMISTRY
Unit 10: p-Block Elements
Considering the Ellingham diagram, which of the following metals can be used to reduce alumina?
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2018 (7 sets)
- A. Fe
- B. Cu
- C. Mg
- D. Zn
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Q7
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The compound A on treatment with Na gives B, and with PCl₅ gives C. B and C react together to give diethyl ether. A, B and C are in the order
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2018 (13 sets)
- A. C₂H₅OH, C₂H₆, C₂H₅Cl
- B. C₂H₅OH, C₂H₅ONa, C₂H₅Cl
- C. C₂H₅Cl, C₂H₆, C₂H₅OH
- D. C₂H₅OH, C₂H₅Cl, C₂H₅ONa
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Q8
CHEMISTRY
Unit 15: Hydrocarbons
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. CH≡CH
- B. CH₄
- C. CH₃–CH₃
- D. CH₂=CH₂
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Q9
CHEMISTRY
Unit 15: Hydrocarbons
The compound C₇H₈ undergoes the following reactions. The product 'C' is
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2018 (2 sets)
- A. m-bromotoluene
- B. p-bromotoluene
- C. 3-bromo-2,4,6-trichlorotoluene
- D. o-bromotoluene
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Q10
CHEMISTRY
Unit 10: p-Block Elements
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
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2018 (8 sets)
- A. N₂O₅
- B. NO
- C. N₂O
- D. NO₂
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Q10
CHEMISTRY
Unit 10: p-Block Elements
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
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2018 (8 sets)
- A. N₂O₅
- B. NO
- C. N₂O
- D. NO₂
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Q11
CHEMISTRY
Unit 6: Equilibrium
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
a. 60 mL 10⁻¹ M HCl + 40 mL 10⁻¹ M NaOH
b. 55 mL 10⁻¹ M HCl + 45 mL 10⁻¹ M NaOH
c. 75 mL 5×10⁻² M HCl + 25 mL 5×10⁻² M NaOH
d. 100 mL 10⁻¹ M HCl + 100 mL 10⁻¹ M NaOH
pH of which one of them will be equal to 1?
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2018 (11 sets)
- A. b
- B. c
- C. d
- D. a
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Q11
CHEMISTRY
Unit 6: Equilibrium
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
a. 60 mL 10⁻¹ M HCl + 40 mL 10⁻¹ M NaOH
b. 55 mL 10⁻¹ M HCl + 45 mL 10⁻¹ M NaOH
c. 75 mL 5×10⁻² M HCl + 25 mL 5×10⁻² M NaOH
d. 100 mL 10⁻¹ M HCl + 100 mL 10⁻¹ M NaOH
pH of which one of them will be equal to 1?
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2018 (11 sets)
- A. b
- B. c
- C. d
- D. a
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Q12
CHEMISTRY
Unit 5: Solutions
On which of the following properties does the coagulating power of an ion depend?
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2018 (5 sets)
- A. The magnitude of the charge on the ion alone
- B. The sign of charge on the ion alone
- C. Both magnitude and sign of the charge on the ion
- D. Size of the ion alone
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Q13
CHEMISTRY
Unit 6: Equilibrium
The solubility of BaSO₄ in water is 2.42 × 10⁻³ g L⁻¹ at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO₄ = 233 g mol⁻¹)
↻ Repeated question — also appeared in
2018 (13 sets)
- A. 1.08 × 10⁻¹⁰ mol² L⁻²
- B. 1.08 × 10⁻⁸ mol² L⁻²
- C. 1.08 × 10⁻¹⁴ mol² L⁻²
- D. 1.08 × 10⁻¹² mol² L⁻²
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Q14
PHYSICS
Unit 9: Kinetic Theory of Gases
Given van der Waals constant for NH₃, H₂, O₂ and CO₂ are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?
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2018 (9 sets)
- A. NH₃
- B. CO₂
- C. O₂
- D. H₂
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Q15
CHEMISTRY
Unit 11: d- and f-Block Elements
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code:
Column I: a. Co³⁺, b. Cr³⁺, c. Fe³⁺, d. Ni²⁺
Column II: i. √8 B.M., ii. √35 B.M., iii. √3 B.M., iv. √24 B.M., v. √15 B.M.
↻ Repeated question — also appeared in
2018 (2 sets)
- A. a-iv, b-v, c-ii, d-i
- B. a-iii, b-v, c-i, d-ii
- C. a-iv, b-i, c-ii, d-iii
- D. a-i, b-ii, c-iii, d-iv
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Q16
CHEMISTRY
Unit 12: Coordination Compounds
Iron carbonyl, Fe(CO)₅ is
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2018 (14 sets)
- A. tetranuclear
- B. dinuclear
- C. trinuclear
- D. mononuclear
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Q17
CHEMISTRY
Unit 12: Coordination Compounds
The geometry and magnetic behaviour of the complex [Ni(CO)₄] are
↻ Repeated question — also appeared in
2018 (15 sets)
- A. square planar geometry and diamagnetic
- B. tetrahedral geometry and paramagnetic
- C. square planar geometry and paramagnetic
- D. tetrahedral geometry and diamagnetic
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Q18
CHEMISTRY
Unit 11: d- and f-Block Elements
Which one of the following ions exhibits d-d transition and paramagnetism as well?
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2018 (8 sets)
- A. CrO₄²⁻
- B. MnO₄²⁻
- C. MnO₄⁻
- D. Cr₂O₇²⁻
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Q19
CHEMISTRY
Unit 12: Coordination Compounds
The type of isomerism shown by the complex [CoCl₂(en)₂] is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Geometrical isomerism
- B. Linkage isomerism
- C. Ionization isomerism
- D. Coordination isomerism
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Q21
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following compounds can form a zwitterion?
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2018 (5 sets)
- A. Aniline
- B. Glycine
- C. Benzoic acid
- D. Acetanilide
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Q22
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following molecules represents the order of hybridisation sp², sp², sp, sp from left to right atoms?
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2018 (11 sets)
- A. HC≡C–C≡CH
- B. CH₃–CH=CH–CH₃
- C. CH₂=CH–CH=CH₂
- D. CH₂=CH–C≡CH
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Q24
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following is correct with respect to −I effect of the substituents? (R = alkyl)
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2018 (13 sets)
- A. –NH₂ < –OR < –F
- B. –NR₂ > –OR > –F
- C. –NH₂ > –OR > –F
- D. –NR₂ < –OR < –F
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Q25
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s² 2s² 2p³, the simplest formula for this compound is
- A. Mg₂X₃
- B. Mg₃X₂
- C. Mg₂X
- D. MgX₂
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Q26
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is
↻ Repeated question — also appeared in
2018 (2 sets)
- A. √2/√3
- B. √2/1
- C. 2√4/3√3
- D. 2√3/3√4
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Q26
PHYSICS
Unit 7: Properties of Solids and Liquids
Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is
↻ Repeated question — also appeared in
2018 (8 sets)
- A. √2 / √3
- B. √2 / 1
- C. 2√4 / 3√3
- D. 2√3 / 3√4
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Q27
CHEMISTRY
Unit 2: Atomic Structure
Which one is a wrong statement?
(1) Total orbital angular momentum of electron in 's' orbital is equal to zero.
(2) The value of m for d_z² is zero.
(3) The electronic configuration of N atom is [shown with all three 2p orbitals each having one electron with same spin, per Hund's rule].
(4) An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
- A. Total orbital angular momentum of electron in 's' orbital is equal to zero.
- B. The value of m for d_{z²} is zero.
- C. The electronic configuration of N atom violates Hund's rule.
- D. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
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Q27
CHEMISTRY
Unit 2: Atomic Structure
Which one is a wrong statement?
(1) Total orbital angular momentum of electron in 's' orbital is equal to zero.
(2) The value of m for d(z²) is zero.
(3) The electronic configuration of N atom is [He] 2s² 2p¹ₓ 2p¹ᵧ 2p¹_z (half-filled 2p subshell with parallel spins).
(4) An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
- A. Total orbital angular momentum of electron in 's' orbital is equal to zero.
- B. The value of m for d(z²) is zero.
- C. The electronic configuration of N atom is [He] 2s² 2p¹ₓ 2p¹ᵧ 2p¹_z.
- D. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
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Q28
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Consider the following species: CN⁺, CN⁻, NO and CN. Which one of these will have the highest bond order?
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2018 (14 sets)
- A. NO
- B. CN
- C. CN⁺
- D. CN⁻
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Q28
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Consider the following species: CN⁺, CN⁻, NO and CN. Which one of these will have the highest bond order?
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2018 (14 sets)
- A. NO
- B. CN
- C. CN⁺
- D. CN⁻
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Q30
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
↻ Repeated question — also appeared in
2018 (13 sets)
- A. formation of intramolecular H-bonding
- B. formation of intermolecular H-bonding
- C. more extensive association of carboxylic acid via van der Waals force of attraction
- D. formation of carboxylate ion
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Q32
CHEMISTRY
Unit 8: Chemical Kinetics
The correct difference between first- and second-order reactions is that
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2018 (15 sets)
- A. the rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations
- B. the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations
- C. a first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed
- D. the half-life of a first-order reaction does not depend on [A]₀; the half-life of a second-order reaction does depend on [A]₀
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Q33
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Among CaH₂, BeH₂, BaH₂, the order of ionic character is
↻ Repeated question — also appeared in
2018 (7 sets)
- A. BeH₂ < CaH₂ < BaH₂
- B. BaH₂ < BeH₂ < CaH₂
- C. BeH₂ < BaH₂ < CaH₂
- D. CaH₂ < BeH₂ < BaH₂
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Q35
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
In which case is the number of molecules of water maximum?
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2018 (15 sets)
- A. 18 mL of water
- B. 10⁻³ mol of water
- C. 0.00224 L of water vapours at 1 atm and 273 K
- D. 0.18 g of water
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Q36
CHEMISTRY
Unit 19: Biomolecules
Regarding cross-linked or network polymers, which of the following statements is incorrect?
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2018 (5 sets)
- A. They contain covalent bonds between various linear polymer chains.
- B. They contain strong covalent bonds in their polymer chains.
- C. Examples are bakelite and melamine.
- D. They are formed from bi- and tri-functional monomers.
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Q37
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Nitration of aniline in strong acidic medium also gives m-nitroaniline because
↻ Repeated question — also appeared in
2018 (12 sets)
- A. In spite of substituents nitro group always goes to only m-position.
- B. In acidic (strong) medium aniline is present as anilinium ion.
- C. In absence of substituents nitro group always goes to m-position.
- D. In electrophilic substitution reactions amino group is meta directive.
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Q38
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxides is most acidic in nature?
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2018 (7 sets)
- A. MgO
- B. CaO
- C. BaO
- D. BeO
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Q40
CHEMISTRY
Unit 15: Hydrocarbons
A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H₂SO₄. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be
↻ Repeated question — also appeared in
2018 (1 set)
- A. 1.4
- B. 4.4
- C. 2.8
- D. 3.0
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Q40
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H₂SO₄. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be
↻ Repeated question — also appeared in
2018 (2 sets)
- A. 1.4
- B. 4.4
- C. 2.8
- D. 3.0
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Q41
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the redox reaction MnO₄⁻ + C₂O₄²⁻ + H⁺ → Mn²⁺ + CO₂ + H₂O, the correct coefficients of the reactants for the balanced equation are:
MnO₄⁻ C₂O₄²⁻ H⁺
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2018 (4 sets)
- A. 16 5 2
- B. 5 16 2
- C. 2 16 5
- D. 2 5 16
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Q42
PHYSICS
Unit 9: Kinetic Theory of Gases
The correction factor 'a' to the ideal gas equation corresponds to
↻ Repeated question — also appeared in
2018 (11 sets)
- A. density of the gas molecules
- B. forces of attraction between the gas molecules
- C. electric field present between the gas molecules
- D. volume of the gas molecules
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Q42
PHYSICS
Unit 9: Kinetic Theory of Gases
The correction factor 'a' to the ideal gas equation corresponds to
↻ Repeated question — also appeared in
2018 (11 sets)
- A. density of the gas molecules
- B. forces of attraction between the gas molecules
- C. electric field present between the gas molecules
- D. volume of the gas molecules
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Q43
CHEMISTRY
Unit 6: Equilibrium
Which one of the following conditions will favour maximum formation of the product in the reaction, A₂(g) + B₂(g) ⇌ X₂(g), ΔᵣH = −X kJ?
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2018 (13 sets)
- A. Low temperature and high pressure
- B. High temperature and low pressure
- C. High temperature and high pressure
- D. Low temperature and low pressure
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Q43
CHEMISTRY
Unit 6: Equilibrium
Which one of the following conditions will favour maximum formation of the product in the reaction, A₂(g) + B₂(g) ⇌ X₂(g), ΔᵣH = −X kJ?
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Low temperature and high pressure
- B. High temperature and low pressure
- C. High temperature and high pressure
- D. Low temperature and low pressure
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Q44
CHEMISTRY
Unit 4: Chemical Thermodynamics
The bond dissociation energies of X₂, Y₂ and XY are in the ratio of 1 : 0.5 : 1. ΔH for the formation of XY is −200 kJ mol⁻¹. The bond dissociation energy of X₂ will be
↻ Repeated question — also appeared in
2018 (12 sets)
- A. 200 kJ mol⁻¹
- B. 400 kJ mol⁻¹
- C. 800 kJ mol⁻¹
- D. 100 kJ mol⁻¹
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Q45
CHEMISTRY
Unit 8: Chemical Kinetics
When initial concentration of the reactant is doubled, the half-life period of a zero order reaction
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2018 (15 sets)
- A. is halved
- B. remains unchanged
- C. is tripled
- D. is doubled
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Q46
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is an occupational respiratory disorder?
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2018 (1 set)
- A. Anthracis
- B. Emphysema
- C. Botulism
- D. Silicosis
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Q47
BIOLOGY
Unit 5: Human Physiology
Calcium is important in skeletal muscle contraction because it
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- A. binds to troponin to remove the masking of active sites on actin for myosin.
- B. prevents the formation of bonds between the myosin cross bridges and the actin filament.
- C. detaches the myosin head from the actin filament.
- D. activates the myosin ATPase by binding to it.
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Q48
BIOLOGY
Unit 5: Human Physiology
Which of the following gastric cells indirectly help in erythropoiesis?
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- A. Chief cells
- B. Parietal cells
- C. Goblet cells
- D. Mucous cells
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Q49
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I — Column II
a. Fibrinogen — i. Osmotic balance
b. Globulin — ii. Blood clotting
c. Albumin — iii. Defence mechanism
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2018 (3 sets)
- A. a-iii, b-ii, c-i
- B. a-ii, b-iii, c-i
- C. a-i, b-iii, c-ii
- D. a-i, b-ii, c-iii
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Q50
BIOLOGY
Unit 5: Human Physiology
Which of the following hormones can play a significant role in osteoporosis?
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2018 (15 sets)
- A. Aldosterone and Prolactin
- B. Parathyroid hormone and Prolactin
- C. Estrogen and Parathyroid hormone
- D. Progesterone and Aldosterone
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Q51
BIOLOGY
Unit 5: Human Physiology
Which of the following is an amino acid derived hormone?
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- A. Epinephrine
- B. Estriol
- C. Estradiol
- D. Ecdysone
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Q52
BIOLOGY
Unit 5: Human Physiology
Which of the following structures or regions is incorrectly paired with its function?
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- A. Medulla oblongata : controls respiration and cardiovascular reflexes.
- B. Corpus callosum : band of fibres connecting left and right cerebral hemispheres.
- C. Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst.
- D. Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.
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Q53
BIOLOGY
Unit 5: Human Physiology
The transparent lens in the human eye is held in its place by
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- A. ligaments attached to the ciliary body
- B. smooth muscles attached to the ciliary body
- C. smooth muscles attached to the iris
- D. ligaments attached to the iris
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Q54
BIOLOGY
Unit 7: Genetics and Evolution
Among the following sets of examples for divergent evolution, select the incorrect option:
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- A. Forelimbs of man, bat and cheetah
- B. Eye of octopus, bat and man
- C. Brain of bat, man and cheetah
- D. Heart of bat, man and cheetah
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Q55
BIOLOGY
Unit 8: Biology and Human Welfare
In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
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2018 (10 sets)
- A. Elephantiasis
- B. Amoebiasis
- C. Ringworm disease
- D. Ascariasis
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Q55
BIOLOGY
Unit 8: Biology and Human Welfare
In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
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2018 (10 sets)
- A. Elephantiasis
- B. Amoebiasis
- C. Ringworm disease
- D. Ascariasis
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Q56
BIOLOGY
Unit 5: Human Physiology
Which of the following is not an autoimmune disease?
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- A. Psoriasis
- B. Vitiligo
- C. Alzheimer's disease
- D. Rheumatoid arthritis
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Q56
BIOLOGY
Unit 5: Human Physiology
Which of the following is not an autoimmune disease?
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2018 (9 sets)
- A. Psoriasis
- B. Vitiligo
- C. Alzheimer's disease
- D. Rheumatoid arthritis
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Q57
BIOLOGY
Unit 8: Biology and Human Welfare
Conversion of milk to curd improves its nutritional value by increasing the amount of
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Vitamin D
- B. Vitamin E
- C. Vitamin B₁₂
- D. Vitamin A
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Q57
BIOLOGY
Unit 8: Biology and Human Welfare
Conversion of milk to curd improves its nutritional value by increasing the amount of
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Vitamin D
- B. Vitamin E
- C. Vitamin B₁₂
- D. Vitamin A
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Q58
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following characteristics represent 'Inheritance of blood groups' in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
↻ Repeated question — also appeared in
2018 (14 sets)
- A. b, c and e
- B. a, c and e
- C. b, d and e
- D. a, b and c
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Q58
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following characteristics represent 'Inheritance of blood groups' in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
↻ Repeated question — also appeared in
2018 (14 sets)
- A. b, c and e
- B. a, c and e
- C. b, d and e
- D. a, b and c
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Q59
BIOLOGY
Unit 7: Genetics and Evolution
The similarity of bone structure in the forelimbs of many vertebrates is an example of
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Homology
- B. Adaptive radiation
- C. Convergent evolution
- D. Analogy
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Q59
BIOLOGY
Unit 7: Genetics and Evolution
The similarity of bone structure in the forelimbs of many vertebrates is an example of
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Homology
- B. Adaptive radiation
- C. Convergent evolution
- D. Analogy
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Q60
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the following animals does not undergo metamorphosis?
↻ Repeated question — also appeared in
2018 (5 sets)
- A. Earthworm
- B. Starfish
- C. Moth
- D. Tunicate
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Q61
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which one of these animals is not a homeotherm?
↻ Repeated question — also appeared in
2018 (5 sets)
- A. Macropus
- B. Psittacula
- C. Camelus
- D. Chelone
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Q62
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the following features is used to identify a male cockroach from a female cockroach?
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Presence of a boat shaped sternum on the 9th abdominal segment
- B. Presence of anal cerci
- C. Forewings with darker tegmina
- D. Presence of caudal styles
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Q63
BIOLOGY
Unit 10: Ecology and Environment
Which of the following organisms are known as chief producers in the oceans?
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Dinoflagellates
- B. Euglenoids
- C. Cyanobacteria
- D. Diatoms
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Q64
BIOLOGY
Unit 1: Diversity in Living World
Ciliates differ from all other protozoans in
↻ Repeated question — also appeared in
2018 (14 sets)
- A. using flagella for locomotion
- B. having two types of nuclei
- C. using pseudopodia for capturing prey
- D. having a contractile vacuole for removing excess water
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Q65
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system.
↻ Repeated question — also appeared in
2018 (6 sets)
- A. Amphibia
- B. Osteichthyes
- C. Aves
- D. Reptilia
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Q66
BIOLOGY
Unit 6: Reproduction
The amnion of mammalian embryo is derived from
↻ Repeated question — also appeared in
2018 (14 sets)
- A. ectoderm and mesoderm
- B. ectoderm and endoderm
- C. mesoderm and trophoblast
- D. endoderm and mesoderm
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Q67
BIOLOGY
Unit 6: Reproduction
Hormones secreted by the placenta to maintain pregnancy are
↻ Repeated question — also appeared in
2018 (13 sets)
- A. hCG, hPL, progestogens, prolactin
- B. hCG, progestogens, estrogens, glucocorticoids
- C. hCG, hPL, progestogens, estrogens
- D. hCG, hPL, estrogens, relaxin, oxytocin
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Q68
BIOLOGY
Unit 6: Reproduction
The contraceptive 'SAHELI'
↻ Repeated question — also appeared in
2018 (12 sets)
- A. blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
- B. is a post-coital contraceptive.
- C. is an IUD.
- D. increases the concentration of estrogen and prevents ovulation in females.
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Q69
BIOLOGY
Unit 6: Reproduction
The difference between spermiogenesis and spermiation is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
- B. In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
- C. In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
- D. In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
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Q70
BIOLOGY
Unit 10: Ecology and Environment
In a growing population of a country,
↻ Repeated question — also appeared in
2018 (15 sets)
- A. pre-reproductive individuals are more than the reproductive individuals.
- B. pre-reproductive individuals are less than the reproductive individuals.
- C. reproductive and pre-reproductive individuals are equal in number.
- D. reproductive individuals are less than the post-reproductive individuals.
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Q71
BIOLOGY
Unit 10: Ecology and Environment
Match the items given in Column I with those in Column II and select the correct option given below:
Column I — Column II
a. Eutrophication — i. UV-B radiation
b. Sanitary landfill — ii. Deforestation
c. Snow blindness — iii. Nutrient enrichment
d. Jhum cultivation — iv. Waste disposal
↻ Repeated question — also appeared in
2018 (2 sets)
- A. a-ii, b-i, c-iii, d-iv
- B. a-i, b-ii, c-iv, d-iii
- C. a-iii, b-iv, c-i, d-ii
- D. a-i, b-iii, c-iv, d-ii
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Q72
BIOLOGY
Unit 8: Biology and Human Welfare
Which part of poppy plant is used to obtain the drug 'Smack'?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Flowers
- B. Leaves
- C. Roots
- D. Latex
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Q72
BIOLOGY
Unit 8: Biology and Human Welfare
Which part of poppy plant is used to obtain the drug 'Smack'?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Flowers
- B. Leaves
- C. Roots
- D. Latex
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Q73
BIOLOGY
Unit 8: Biology and Human Welfare
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
↻ Repeated question — also appeared in
2018 (3 sets)
- A. Commensalism
- B. Amensalism
- C. Parasitism
- D. Mutualism
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Q73
BIOLOGY
Unit 10: Ecology and Environment
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
↻ Repeated question — also appeared in
2018 (12 sets)
- A. Commensalism
- B. Amensalism
- C. Parasitism
- D. Mutualism
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Q74
BIOLOGY
Unit 10: Ecology and Environment
All of the following are included in 'Ex-situ conservation' except
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Wildlife safari parks
- B. Seed banks
- C. Botanical gardens
- D. Sacred groves
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Q74
BIOLOGY
Unit 10: Ecology and Environment
All of the following are included in 'Ex-situ conservation' except
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Wildlife safari parks
- B. Seed banks
- C. Botanical gardens
- D. Sacred groves
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Q75
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Glycosuria i. Accumulation of uric acid in joints
b. Gout ii. Mass of crystallised salts within the kidney
c. Renal calculi iii. Inflammation in glomeruli
d. Glomerular nephritis iv. Presence of glucose in urine
↻ Repeated question — also appeared in
2018 (4 sets)
- A. a-iii, b-ii, c-iv, d-i
- B. a-iv, b-i, c-ii, d-iii
- C. a-ii, b-iii, c-i, d-iv
- D. a-i, b-ii, c-iii, d-iv
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Q76
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function) Column II (Part of Excretory System)
a. Ultrafiltration i. Henle's loop
b. Concentration of urine ii. Ureter
c. Transport of urine iii. Urinary bladder
d. Storage of urine iv. Malpighian corpuscle
v. Proximal convoluted tubule
↻ Repeated question — also appeared in
2018 (4 sets)
- A. a-iv, b-v, c-ii, d-iii
- B. a-v, b-iv, c-i, d-iii
- C. a-v, b-iv, c-i, d-ii
- D. a-iv, b-i, c-ii, d-iii
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Q77
BIOLOGY
Unit 7: Genetics and Evolution
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Only daughters
- B. Both sons and daughters
- C. Only grandchildren
- D. Only sons
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Q78
BIOLOGY
Unit 7: Genetics and Evolution
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. AGGUAUCGCAU
- B. UCCAUAGCGUA
- C. ACCUAUGCGAU
- D. UGGTUTCGCAT
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Q79
BIOLOGY
Unit 6: Reproduction
Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Proliferative Phase i. Breakdown of endometrial lining
b. Secretory Phase ii. Follicular Phase
c. Menstruation iii. Luteal Phase
↻ Repeated question — also appeared in
2018 (3 sets)
- A. a-iii, b-ii, c-i
- B. a-iii, b-i, c-ii
- C. a-ii, b-iii, c-i
- D. a-i, b-iii, c-ii
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Q80
BIOLOGY
Unit 7: Genetics and Evolution
According to Hugo de Vries, the mechanism of evolution is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Multiple step mutations
- B. Minor mutations
- C. Phenotypic variations
- D. Saltation
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Q81
BIOLOGY
Unit 7: Genetics and Evolution
All of the following are part of an operon except
↻ Repeated question — also appeared in
2018 (12 sets)
- A. an operator
- B. a promoter
- C. an enhancer
- D. structural genes
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Q82
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following events does not occur in rough endoplasmic reticulum?
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Protein folding
- B. Phospholipid synthesis
- C. Cleavage of signal peptide
- D. Protein glycosylation
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Q83
BIOLOGY
Unit 4: Plant Physiology
Which of these statements is incorrect?
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Enzymes of TCA cycle are present in mitochondrial matrix.
- B. Oxidative phosphorylation takes place in outer mitochondrial membrane.
- C. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
- D. Glycolysis occurs in cytosol.
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Q84
BIOLOGY
Unit 7: Genetics and Evolution
Select the incorrect match:
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Lampbrush chromosomes – Diplotene bivalents
- B. Polytene chromosomes – Oocytes of amphibians
- C. Submetacentric chromosomes – L-shaped chromosomes
- D. Allosomes – Sex chromosomes
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Q85
BIOLOGY
Unit 5: Human Physiology
Which of the following terms describe human dentition?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Thecodont, Diphyodont, Homodont
- B. Pleurodont, Diphyodont, Heterodont
- C. Pleurodont, Monophyodont, Homodont
- D. Thecodont, Diphyodont, Heterodont
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Q86
BIOLOGY
Unit 5: Human Physiology
Nissl bodies are mainly composed of
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Proteins and lipids
- B. Free ribosomes and RER
- C. Nucleic acids and SER
- D. DNA and RNA
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Q87
BIOLOGY
Unit 3: Cell Structure and Function
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Polysome
- B. Nucleosome
- C. Plastidome
- D. Polyhedral bodies
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Q87
BIOLOGY
Unit 3: Cell Structure and Function
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Polysome
- B. Nucleosome
- C. Plastidome
- D. Polyhedral bodies
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Q88
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Tricuspid valve i. Between left atrium and left ventricle
b. Bicuspid valve ii. Between right ventricle and pulmonary artery
c. Semilunar valve iii. Between right atrium and right ventricle
↻ Repeated question — also appeared in
2018 (2 sets)
- A. a-iii, b-i, c-ii
- B. a-ii, b-i, c-iii
- C. a-i, b-ii, c-iii
- D. a-i, b-iii, c-ii
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Q88
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tricuspid valve
b. Bicuspid valve
c. Semilunar valve
Column II
i. Between left atrium and left ventricle
ii. Between right ventricle and pulmonary artery
iii. Between right atrium and right ventricle
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a-iii, b-i, c-ii
- B. a-ii, b-i, c-iii
- C. a-i, b-ii, c-iii
- D. a-i, b-iii, c-ii
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Q89
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Tidal volume i. 2500 – 3000 mL
b. Inspiratory Reserve volume ii. 1100 – 1200 mL
c. Expiratory Reserve volume iii. 500 – 550 mL
d. Residual volume iv. 1000 – 1100 mL
↻ Repeated question — also appeared in
2018 (2 sets)
- A. a-iii, b-ii, c-i, d-iv
- B. a-iv, b-iii, c-ii, d-i
- C. a-i, b-iv, c-ii, d-iii
- D. a-iii, b-i, c-iv, d-ii
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Q89
BIOLOGY
Unit 5: Human Physiology
Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tidal volume
b. Inspiratory Reserve volume
c. Expiratory Reserve volume
d. Residual volume
Column II
i. 2500–3000 mL
ii. 1100–1200 mL
iii. 500–550 mL
iv. 1000–1100 mL
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a-iii, b-ii, c-i, d-iv
- B. a-iv, b-iii, c-ii, d-i
- C. a-i, b-iv, c-ii, d-iii
- D. a-iii, b-i, c-iv, d-ii
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Q90
BIOLOGY
Unit 5: Human Physiology
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Inflammation of bronchioles; Decreased respiratory surface
- B. Decreased respiratory surface; Inflammation of bronchioles
- C. Increased respiratory surface; Inflammation of bronchioles
- D. Increased number of bronchioles; Increased respiratory surface
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Q91
BIOLOGY
Unit 7: Genetics and Evolution
The stage during which separation of the paired homologous chromosomes begins is
↻ Repeated question — also appeared in
2018 (2 sets)
- A. Pachytene
- B. Zygotene
- C. Diakinesis
- D. Diplotene
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Q92
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following is true for nucleolus?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Larger nucleoli are present in dividing cells.
- B. It is a site for active ribosomal RNA synthesis.
- C. It takes part in spindle formation.
- D. It is a membrane-bound structure.
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Q93
BIOLOGY
Unit 4: Plant Physiology
Stomatal movement is not affected by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Temperature
- B. CO₂ concentration
- C. O₂ concentration
- D. Light
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Q94
BIOLOGY
Unit 1: Diversity in Living World
Which among the following is not a prokaryote?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Saccharomyces
- B. Oscillatoria
- C. Nostoc
- D. Mycobacterium
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Q95
BIOLOGY
Unit 4: Plant Physiology
Which of the following is not a product of light reaction of photosynthesis?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. ATP
- B. Oxygen
- C. NADPH
- D. NADH
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Q96
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Stomata in grass leaf are
↻ Repeated question — also appeared in
2018 (10 sets)
- A. Dumb-bell shaped
- B. Barrel shaped
- C. Rectangular
- D. Kidney shaped
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Q97
BIOLOGY
Unit 3: Cell Structure and Function
The Golgi complex participates in
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Fatty acid breakdown
- B. Activation of amino acid
- C. Respiration in bacteria
- D. Formation of secretory vesicles
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Q98
CHEMISTRY
Unit 19: Biomolecules
The two functional groups characteristic of sugars are
↻ Repeated question — also appeared in
2018 (7 sets)
- A. Hydroxyl and methyl
- B. Carbonyl and hydroxyl
- C. Carbonyl and phosphate
- D. Carbonyl and methyl
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Q99
BIOLOGY
Unit 9: Biotechnology and Its Applications
A 'new' variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Co-667
- B. Basmati
- C. Lerma Rojo
- D. Sharbati Sonora
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Q100
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match:
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Ribozyme – Nucleic acid
- B. G. Mendel – Transformation
- C. T.H. Morgan – Transduction
- D. F₂ Recessive parent – Dihybrid cross
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Q101
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Retrovirus
- B. pBR 322
- C. λ phage
- D. Ti plasmid
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Q102
BIOLOGY
Unit 9: Biotechnology and Its Applications
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Indian Council of Medical Research (ICMR)
- B. Genetic Engineering Appraisal Committee (GEAC)
- C. Research Committee on Genetic Manipulation (RCGM)
- D. Council for Scientific and Industrial Research (CSIR)
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Q103
BIOLOGY
Unit 9: Biotechnology and Its Applications
The correct order of steps in Polymerase Chain Reaction (PCR) is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Extension, Denaturation, Annealing
- B. Denaturation, Annealing, Extension
- C. Denaturation, Extension, Annealing
- D. Annealing, Extension, Denaturation
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Q104
BIOLOGY
Unit 9: Biotechnology and Its Applications
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Bio-infringement
- B. Bioexploitation
- C. Biodegradation
- D. Biopiracy
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Q104
BIOLOGY
Unit 10: Ecology and Environment
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Bio-infringement
- B. Bioexploitation
- C. Biodegradation
- D. Biopiracy
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Q105
BIOLOGY
Unit 6: Reproduction
Winged pollen grains are present in
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Mustard
- B. Pinus
- C. Mango
- D. Cycas
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Q105
BIOLOGY
Unit 1: Diversity in Living World
Winged pollen grains are present in
↻ Repeated question — also appeared in
2018 (7 sets)
- A. Mustard
- B. Pinus
- C. Mango
- D. Cycas
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Q106
BIOLOGY
Unit 1: Diversity in Living World
After karyogamy followed by meiosis, spores are produced exogenously in
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Neurospora
- B. Saccharomyces
- C. Agaricus
- D. Alternaria
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Q106
BIOLOGY
Unit 1: Diversity in Living World
After karyogamy followed by meiosis, spores are produced exogenously in
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Neurospora
- B. Saccharomyces
- C. Agaricus
- D. Alternaria
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Q107
BIOLOGY
Unit 1: Diversity in Living World
Which one is wrongly matched?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Uniflagellate gametes – Polysiphonia
- B. Unicellular organism – Chlorella
- C. Gemma cups – Marchantia
- D. Biflagellate zoospores – Brown algae
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Q107
BIOLOGY
Unit 1: Diversity in Living World
Which one is wrongly matched?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Uniflagellate gametes – Polysiphonia
- B. Unicellular organism – Chlorella
- C. Gemma cups – Marchantia
- D. Biflagellate zoospores – Brown algae
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Q108
BIOLOGY
Unit 1: Diversity in Living World
Match the items given in Column I with those in Column II and select the correct option given below:
Column I Column II
a. Herbarium i. It is a place having a collection of preserved plants and animals.
b. Key ii. A list that enumerates methodically all the species found in an area with brief description aiding identification.
c. Museum iii. Is a place where dried and pressed plant specimens mounted on sheets are kept.
d. Catalogue iv. A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.
↻ Repeated question — also appeared in
2018 (10 sets)
- A. a-i, b-iv, c-iii, d-ii
- B. a-iii, b-iv, c-i, d-ii
- C. a-ii, b-iv, c-iii, d-i
- D. a-iii, b-ii, c-i, d-iv
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Q109
BIOLOGY
Unit 4: Plant Physiology
What is the role of NAD⁺ in cellular respiration?
↻ Repeated question — also appeared in
2018 (13 sets)
- A. It functions as an enzyme.
- B. It is the final electron acceptor for anaerobic respiration.
- C. It is a nucleotide source for ATP synthesis.
- D. It functions as an electron carrier.
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Q110
BIOLOGY
Unit 4: Plant Physiology
Oxygen is not produced during photosynthesis by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Green sulphur bacteria
- B. Chara
- C. Cycas
- D. Nostoc
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Q111
BIOLOGY
Unit 6: Reproduction
Double fertilization is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Fusion of two male gametes of a pollen tube with two different eggs
- B. Syngamy and triple fusion
- C. Fusion of two male gametes with one egg
- D. Fusion of one male gamete with two polar nuclei
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Q112
BIOLOGY
Unit 4: Plant Physiology
In which of the following forms is iron absorbed by plants?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Ferric
- B. Both ferric and ferrous
- C. Free element
- D. Ferrous
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Q136
PHYSICS
Unit 8: Thermodynamics
The power radiated by a black body is P and it radiates maximum energy at wavelength λ₀. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength (3/4)λ₀, the power radiated by it becomes nP. The value of n is
↻ Repeated question — also appeared in
2018 (12 sets)
- A. 4/3
- B. 256/81
- C. 81/256
- D. 3/4
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Q137
PHYSICS
Unit 7: Properties of Solids and Liquids
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by Δl on applying a force F, how much force is needed to stretch the second wire by the same amount Δl?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 9F
- B. F
- C. 4F
- D. 6F
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Q138
PHYSICS
Unit 8: Thermodynamics
A sample of 0.1 g of water at 100°C and normal pressure (1.013 × 10⁵ N m⁻²) requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 104.3 J
- B. 84.5 J
- C. 42.2 J
- D. 208.7 J
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Q139
PHYSICS
Unit 7: Properties of Solids and Liquids
A small sphere of radius r falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity is proportional to
↻ Repeated question — also appeared in
2018 (15 sets)
- A. r³
- B. r⁴
- C. r⁵
- D. r²
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Q140
PHYSICS
Unit 11: Electrostatics
An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electric field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in it through the same vertical distance h. The time of fall of the electron, in comparison to the time of fall of the proton is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. smaller
- B. equal
- C. 10 times greater
- D. 5 times greater
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Q141
PHYSICS
Unit 10: Oscillations and Waves
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s² at a distance of 5 m from the mean position. The time period of oscillation is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 2π s
- B. 1 s
- C. 2 s
- D. π s
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Q141
PHYSICS
Unit 10: Oscillations and Waves
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s² at a distance of 5 m from the mean position. The time period of oscillation is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 2 s
- B. 1 s
- C. 2π s
- D. π s
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Q142
PHYSICS
Unit 11: Electrostatics
The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. independent of the distance between the plates.
- B. inversely proportional to the distance between the plates.
- C. proportional to the square root of the distance between the plates.
- D. linearly proportional to the distance between the plates.
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Q142
PHYSICS
Unit 11: Electrostatics
The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. independent of the distance between the plates.
- B. inversely proportional to the distance between the plates.
- C. proportional to the square root of the distance between the plates.
- D. linearly proportional to the distance between the plates.
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Q143
PHYSICS
Unit 10: Oscillations and Waves
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27°C two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at 27°C is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 330 m/s
- B. 300 m/s
- C. 350 m/s
- D. 339 m/s
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Q144
PHYSICS
Unit 18: Atoms and Nuclei
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 1 : 1
- B. 1 : −2
- C. 2 : −1
- D. 1 : −1
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Q145
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
When the light of frequency 2v₀ (where v₀ is threshold frequency) is incident on a metal plate, the maximum velocity of electrons emitted is v₁. When the frequency of the incident radiation is increased to 5v₀, the maximum velocity of electrons emitted from the same plate is v₂. The ratio of v₁ to v₂ is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 1 : 2
- B. 2 : 1
- C. 4 : 1
- D. 1 : 4
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Q146
PHYSICS
Unit 18: Atoms and Nuclei
For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 20
- B. 15
- C. 30
- D. 10
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Q147
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron of mass m with an initial velocity V⃗ = V₀ î (V₀ > 0) enters an electric field E⃗ = −E₀ î (E₀ = constant > 0) at t = 0. If λ₀ is its de-Broglie wavelength initially, then its de-Broglie wavelength at time t is
↻ Repeated question — also appeared in
2018 (11 sets)
- A. λ₀ / (1 + eE₀t / mV₀)
- B. λ₀
- C. λ₀ t
- D. λ₀ (1 + eE₀t / mV₀)
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Q148
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
An inductor 20 mH, a capacitor 100 μF and a resistor 50 Ω are connected in series across a source of emf V = 10 sin 314t. The power loss in the circuit is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 0.79 W
- B. 1.13 W
- C. 2.74 W
- D. 0.43 W
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Q149
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A metallic rod of mass per unit length 0.5 kg m⁻¹ is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 7.14 A
- B. 11.32 A
- C. 14.76 A
- D. 5.98 A
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Q150
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from
↻ Repeated question — also appeared in
2018 (14 sets)
- A. the current source
- B. the induced electric field due to the changing magnetic field
- C. the lattice structure of the material of the rod
- D. the magnetic field
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Q151
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is
↻ Repeated question — also appeared in
2018 (5 sets)
- A. 40 Ω
- B. 500 Ω
- C. 250 Ω
- D. 25 Ω
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Q152
PHYSICS
Unit 5: Rotational Motion
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (Kₜ) as well as rotational kinetic energy (Kᵣ) simultaneously. The ratio Kₜ : (Kₜ + Kᵣ) for the sphere is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 7 : 10
- B. 2 : 5
- C. 10 : 7
- D. 5 : 7
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Q152
PHYSICS
Unit 5: Rotational Motion
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (K_t) as well as rotational kinetic energy (K_r) simultaneously. The ratio K_t : (K_t + K_r) for the sphere is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 7 : 10
- B. 2 : 5
- C. 10 : 7
- D. 5 : 7
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Q153
PHYSICS
Unit 6: Gravitation
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are Kₐ, K_B and K_C, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Kₐ < K_B < K_C
- B. K_B > Kₐ > K_C
- C. K_B < Kₐ < K_C
- D. Kₐ > K_B > K_C
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Q153
PHYSICS
Unit 6: Gravitation
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are K_A, K_B and K_C, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
↻ Repeated question — also appeared in
2018 (11 sets)
- A. K_A < K_B < K_C
- B. K_B > K_A > K_C
- C. K_B < K_A < K_C
- D. K_A > K_B > K_C
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Q154
PHYSICS
Unit 6: Gravitation
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Raindrops will fall faster.
- B. 'g' on the Earth will not change.
- C. Time period of a simple pendulum on the Earth would decrease.
- D. Walking on the ground would become more difficult.
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Q154
PHYSICS
Unit 6: Gravitation
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Raindrops will fall faster.
- B. 'g' on the Earth will not change.
- C. Time period of a simple pendulum on the Earth would decrease.
- D. Walking on the ground would become more difficult.
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Q155
PHYSICS
Unit 5: Rotational Motion
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Angular velocity
- B. Angular momentum
- C. Rotational kinetic energy
- D. Moment of inertia
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Q156
PHYSICS
Unit 16: Optics
Unpolarised light is incident from air on a plane surface of a material of refractive index 'μ'. At a particular angle of incidence 'i', it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Reflected light is polarised with its electric vector parallel to the plane of incidence
- B. i = tan⁻¹(1/μ)
- C. i = sin⁻¹(1/μ)
- D. Reflected light is polarised with its electric vector perpendicular to the plane of incidence
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Q157
PHYSICS
Unit 16: Optics
In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same λ and D) the separation between the slits needs to be changed to
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 1.8 mm
- B. 1.7 mm
- C. 2.1 mm
- D. 1.9 mm
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Q158
PHYSICS
Unit 16: Optics
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
↻ Repeated question — also appeared in
2018 (15 sets)
- A. small focal length and large diameter
- B. small focal length and small diameter
- C. large focal length and large diameter
- D. large focal length and small diameter
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Q159
PHYSICS
Unit 12: Current Electricity
A carbon resistor of (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Violet – Yellow – Orange – Silver
- B. Green – Orange – Violet – Gold
- C. Yellow – Green – Violet – Gold
- D. Yellow – Violet – Orange – Silver
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Q160
PHYSICS
Unit 12: Current Electricity
A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E' and internal resistance 'R'. The current drawn is I. Now, the 'n' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of 'n' is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 10
- B. 9
- C. 20
- D. 11
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Q162
PHYSICS
Unit 4: Work Energy and Power
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle of diameter AB = D. The height h is equal to
↻ Repeated question — also appeared in
2018 (11 sets)
- A. (3/2)D
- B. (5/4)D
- C. (5/7)D
- D. D
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Q163
PHYSICS
Unit 5: Rotational Motion
Three objects, A: (a solid sphere), B: (a thin circular disk) and C: (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed ω about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
↻ Repeated question — also appeared in
2018 (16 sets)
- A. W_C > W_B > W_A
- B. W_A > W_C > W_B
- C. W_B > W_A > W_C
- D. W_A > W_B > W_C
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Q163
PHYSICS
Unit 5: Rotational Motion
Three objects, A: (a solid sphere), B: (a thin circular disk) and C: (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed ω about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
↻ Repeated question — also appeared in
2018 (16 sets)
- A. W_C > W_B > W_A
- B. W_A > W_C > W_B
- C. W_B > W_A > W_C
- D. W_A > W_B > W_C
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Q164
PHYSICS
Unit 3: Laws of Motion
Which one of the following statements is incorrect?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Rolling friction is smaller than sliding friction.
- B. Coefficient of sliding friction has dimensions of length.
- C. Frictional force opposes the relative motion.
- D. Limiting value of static friction is directly proportional to normal reaction.
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Q164
PHYSICS
Unit 3: Laws of Motion
Which one of the following statements is incorrect?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Rolling friction is smaller than sliding friction.
- B. Coefficient of sliding friction has dimensions of length.
- C. Frictional force opposes the relative motion.
- D. Limiting value of static friction is directly proportional to normal reaction.
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Q165
PHYSICS
Unit 3: Laws of Motion
A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When the initial velocity of the lighter block is v, then the value of coefficient of restitution (e) will be
↻ Repeated question — also appeared in
2018 (10 sets)
- A. 0.5
- B. 0.4
- C. 0.8
- D. 0.25
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Q165
PHYSICS
Unit 4: Work Energy and Power
A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When the initial velocity of the lighter block is v, then the value of coefficient of restitution (e) will be
↻ Repeated question — also appeared in
2018 (5 sets)
- A. 0.5
- B. 0.4
- C. 0.8
- D. 0.25
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Q166
PHYSICS
Unit 15: Electromagnetic Waves
An EM wave is propagating in a medium with a velocity V = V î. The instantaneous oscillating electric field of this EM wave is along +y axis. Then the direction of oscillating magnetic field of the EM wave will be along
↻ Repeated question — also appeared in
2018 (15 sets)
- A. – z direction
- B. – x direction
- C. – y direction
- D. + z direction
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Q167
PHYSICS
Unit 16: Optics
The refractive index of the material of a prism is √2 and the angle of the prism is 30°. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 60°
- B. 0°
- C. 30°
- D. 45°
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Q168
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance
↻ Repeated question — also appeared in
2018 (11 sets)
- A. 0.138 H
- B. 13.89 H
- C. 1.389 H
- D. 138.88 H
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Q169
PHYSICS
Unit 16: Optics
An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of 20 cm towards the mirror, the displacement of the image will be
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 30 cm away from the mirror
- B. 36 cm towards the mirror
- C. 30 cm towards the mirror
- D. 36 cm away from the mirror
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Q171
PHYSICS
Unit 19: Electronic Devices
In a p-n junction diode, change in temperature due to heating
↻ Repeated question — also appeared in
2018 (15 sets)
- A. affects only reverse resistance
- B. affects the overall V–I characteristics of p-n junction
- C. does not affect resistance of p-n junction
- D. affects only forward resistance
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Q173
PHYSICS
Unit 2: Kinematics
A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field E⃗. Due to the force qE⃗, its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively
↻ Repeated question — also appeared in
2018 (13 sets)
- A. 2 m/s, 4 m/s
- B. 1.5 m/s, 3 m/s
- C. 1 m/s, 3.5 m/s
- D. 1 m/s, 3 m/s
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Q174
PHYSICS
Unit 3: Laws of Motion
A block of mass m is placed on a smooth inclined wedge ABC of inclination θ as shown in the figure. The wedge is given an acceleration 'a' towards the right. The relation between a and θ for the block to remain stationary on the wedge is
↻ Repeated question — also appeared in
2018 (11 sets)
- A. a = g/cosθ
- B. a = g tan θ
- C. a = g cos θ
- D. a = g/sinθ
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Q175
PHYSICS
Unit 20: Experimental Skills
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If the screw gauge has a zero error of –0.004 cm, the correct diameter of the ball is
↻ Repeated question — also appeared in
2018 (8 sets)
- A. 0.521 cm
- B. 0.529 cm
- C. 0.053 cm
- D. 0.525 cm
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Q175
PHYSICS
Unit 1: Physics and Measurement
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of –0.004 cm, the correct diameter of the ball is
↻ Repeated question — also appeared in
2018 (9 sets)
- A. 0.521 cm
- B. 0.529 cm
- C. 0.053 cm
- D. 0.525 cm
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Q176
PHYSICS
Unit 5: Rotational Motion
The moment of the force, F⃗ = 4î + 5ĵ – 6k̂ at (2, 0, –3), about the point (2, –2, –2), is given by
↻ Repeated question — also appeared in
2018 (14 sets)
- A. –8î – 4ĵ – 7k̂
- B. –7î – 4ĵ – 8k̂
- C. –7î – 8ĵ – 4k̂
- D. –4î – ĵ – 8k̂
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Q176
PHYSICS
Unit 5: Rotational Motion
The moment of the force, F = 4î + 5ĵ – 6k̂ at (2, 0, –3), about the point (2, –2, –2), is given by
↻ Repeated question — also appeared in
2018 (14 sets)
- A. –8î – 4ĵ – 7k̂
- B. –7î – 4ĵ – 8k̂
- C. –7î – 8ĵ – 4k̂
- D. –4î – ĵ – 8k̂
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Q178
PHYSICS
Unit 10: Oscillations and Waves
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 13.2 cm
- B. 16 cm
- C. 12.5 cm
- D. 8 cm
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Q179
PHYSICS
Unit 8: Thermodynamics
The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 26.8%
- B. 12.5%
- C. 6.25%
- D. 20%
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Q180
PHYSICS
Unit 9: Kinetic Theory of Gases
At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere? (Given: Mass of oxygen molecule (m) = 2.76 × 10⁻²⁶ kg, Boltzmann's constant k_B = 1.38 × 10⁻²³ J K⁻¹)
↻ Repeated question — also appeared in
2018 (13 sets)
- A. 2.508 × 10⁴ K
- B. 1.254 × 10⁴ K
- C. 5.016 × 10⁴ K
- D. 8.360 × 10⁴ K
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