Q1
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following amine will give the carbylamine test?
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2020 (6 sets)
- A. Primary aliphatic or aromatic amine
- B. Secondary amine
- C. Tertiary amine
- D. Secondary amine with different alkyl groups
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Q2
CHEMISTRY
Unit 15: Hydrocarbons
An alkene on ozonolysis gives methanal as one of the product. Its structure is
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2020 (5 sets)
- A. CH3-CH=CH2
- B. CH3-CH2-CH=CH2
- C. CH2=CH-CH2-CH3
- D. CH3-CH2-CH=CH-CH3
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Q3
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Match the following and identify the correct option.
(a) CO(g) + H2(g) (i) Mg(HCO3)2 + Ca(HCO3)2
(b) Temporary hardness of water (ii) An electron deficient hydride
(c) B2H6 (iii) Synthesis gas
(d) H2O2 (iv) Non-planar structure
- A. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
- B. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- C. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- D. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
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Q4
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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- A. 0.20 K
- B. 0.80 K
- C. 0.40 K
- D. 0.60 K
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Q5
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
On electrolysis of dil. sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be
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- A. Hydrogen gas
- B. Oxygen gas
- C. H2S gas
- D. SO2 gas
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Q6
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Identify compound X in the following sequence of reactions: Toluene + Cl2/hv -> X -> H2O/373K -> Benzaldehyde
- A. Chlorotoluene
- B. Benzyl chloride
- C. Benzal chloride (Benzylidene chloride)
- D. Benzotrichloride
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Q7
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 Ag(s)
- B. 1 g of Mg(s)
- C. 1 g of O2(g)
- D. 1 g of Li(s)
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Q8
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the correct statement from the following :
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- A. Wrought iron is impure iron with 4% carbon.
- B. Blister copper has blistered appearance due to evolution of CO2.
- C. Vapour phase refining is carried out for Nickel by Van Arkel method.
- D. Pig iron can be moulded into a variety of shapes.
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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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2020 (8 sets)
- A. – I effect of – CH3 groups
- B. + R effect of – CH3 groups
- C. – R effect of – CH3 groups
- D. Hyperconjugation
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Q10
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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2020 (4 sets)
- A. CuSO4
- B. [Cu(NH3)4]2+
- C. Cu(OH)2
- D. CuCO3·Cu(OH)2
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Q10
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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2020 (4 sets)
- A. CuSO4
- B. [Cu(NH3)4]2+
- C. Cu(OH)2
- D. CuCO3⋅Cu(OH)2
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Q11
PHYSICS
Unit 9: Kinetic Theory of Gases
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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2020 (3 sets)
- A. 9 bar
- B. 12 bar
- C. 15 bar
- D. 18 bar
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Q11
PHYSICS
Unit 9: Kinetic Theory of Gases
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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2020 (3 sets)
- A. 9 bar
- B. 12 bar
- C. 15 bar
- D. 18 bar
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Q12
PHYSICS
Unit 7: Properties of Solids and Liquids
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is
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2020 (4 sets)
- A. (sqrt(3)/4) * 288 pm
- B. (sqrt(2)/4) * 288 pm
- C. (4/sqrt(3)) * 288 pm
- D. (4/sqrt(2)) * 288 pm
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Q12
PHYSICS
Unit 7: Properties of Solids and Liquids
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is
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2020 (4 sets)
- A. (√3/4) * 288 pm
- B. (√2/4) * 288 pm
- C. (4/√3) * 288 pm
- D. (4/√2) * 288 pm
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Q13
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. 100 s
- B. 200 s
- C. 500 s
- D. 1000 s
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Q13
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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2020 (9 sets)
- A. 100 s
- B. 200 s
- C. 500 s
- D. 1000 s
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Q14
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :
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- A. Isopropyl alcohol
- B. Sec. butyl alcohol
- C. Tert. butyl alcohol
- D. Isobutyl alcohol
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Q15
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. Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
- B. Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
- C. Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
- D. Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
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Q16
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. + 4 to + 4
- B. 0 to + 4
- C. – 4 to + 4
- D. 0 to – 4
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Q17
CHEMISTRY
Unit 10: p-Block Elements
Match the following: Oxide Nature (a) CO (i) Basic (b) BaO (ii) Neutral (c) Al2O3 (iii) Acidic (d) Cl2O7 (iv) Amphoteric
- A. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- B. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
- C. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- D. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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Q18
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is not correct about carbon monoxide?
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- A. It forms carboxyhaemoglobin
- B. It reduces oxygen carrying ability of blood.
- C. The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.
- D. It is produced due to incomplete combustion.
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Q19
CHEMISTRY
Unit 10: p-Block Elements
Measuring Zeta potential is useful in determining which property of colloidal solution?
- A. Viscosity
- B. Solubility
- C. Stability of the colloidal particles
- D. Size of the colloidal particles
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Q20
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. SCN– < F– < C2O42– < CN–
- B. SCN– < F– < CN– < C2O42–
- C. F– < SCN– < C2O42– < CN–
- D. CN– < C2O42– < SCN– < F–
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Q21
CHEMISTRY
Unit 15: Hydrocarbons
Elimination reaction of 2-Bromo-pentane to form pent-2-ene is: (a) β-Elimination reaction, (b) Follows Zaitsev rule, (c) Dehydrohalogenation reaction, (d) Dehydration reaction
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a), (b), (c)
- B. (a), (c), (d)
- C. (b), (c), (d)
- D. (a), (b), (d)
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Q22
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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Q23
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect statement.
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- A. Cr2+ (d4) is a stronger reducing agent than Fe2+ (d6) in water.
- B. The transition metals and their compounds are known for their catalytic activity.
- C. Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
- D. The oxidation states of chromium in CrO4^2– and Cr2O7^2– are not the same.
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Q24
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Identify the incorrect match.
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- A. (a) Unnilunium (i) Mendelevium
- B. (b) Unniltrium (ii) Lawrencium
- C. (c) Unnilhexium (iii) Seaborgium
- D. (d) Unununnium (iv) Darmstadtium
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Q24
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Identify the incorrect match.
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- A. Unnilunium (i) Mendelevium
- B. Unniltrium (ii) Lawrencium
- C. Unnilhexium (iii) Seaborgium
- D. Unununnium (iv) Darmstadtium
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Q25
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. Aldol condensation
- B. Cannizzaro’s reaction
- C. Cross Cannizzaro’s reaction
- D. Cross Aldol condensation
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Q25
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as
- A. Aldol condensation
- B. Cannizzaro’s reaction
- C. Cross Cannizzaro’s reaction
- D. Cross Aldol condensation
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Q26
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacid of sulphur has – O – O – linkage?
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- A. H2SO3, sulphurous acid
- B. H2SO4, sulphuric acid
- C. H2S2O8, peroxodisulphuric acid
- D. H2S2O7, pyrosulphuric acid
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Q26
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. H2SO3, sulphurous acid
- B. H2SO4, sulphuric acid
- C. H2S2O8, peroxodisulphuric acid
- D. H2S2O7, pyrosulphuric acid
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Q27
CHEMISTRY
Unit 6: Equilibrium
HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallise(s)?
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- A. Both MgCl2 and CaCl2
- B. Only NaCl
- C. Only MgCl2
- D. NaCl, MgCl2 and CaCl2
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Q27
CHEMISTRY
Unit 6: Equilibrium
HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallise(s)?
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2020 (3 sets)
- A. Both MgCl2 and CaCl2
- B. Only NaCl
- C. Only MgCl2
- D. NaCl, MgCl2 and CaCl2
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Q28
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Anisole on cleavage with HI gives
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Phenol + CH3I
- B. Iodobenzene + CH3OH
- C. Phenol + C2H5I
- D. Iodobenzene + C2H5OH
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Q29
CHEMISTRY
Unit 10: p-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 carbon rings and twenty five carbon rings. (c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline. (d) CO is colorless and odourless gas.
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2020 (5 sets)
- A. (a), (b) and (c) only
- B. (a) and (c) only
- C. (b) and (c) only
- D. (c) and (d) only
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Q30
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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Q31
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
Paper chromatography is an example of
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- A. Adsorption chromatography
- B. Partition chromatography
- C. Thin layer chromatography
- D. Column chromatography
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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-Hexane
- B. 2,3-Dimethylbutane
- C. n-Heptane
- D. n-Butane
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Q33
CHEMISTRY
Unit 8: Chemical Kinetics
An increase in the concentration of the reactants of a reaction leads to change in
↻ Repeated question — also appeared in
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- A. activation energy
- B. heat of reaction
- C. threshold energy
- D. collision frequency
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Q34
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
The number of Faradays(F) required to produce 20 g of calcium from molten CaCl2 (Atomic mass of Ca = 40 g mol–1) is
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 1
- B. 2
- C. 3
- D. 4
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Q35
CHEMISTRY
Unit 5: Solutions
The mixture which shows positive deviation from Raoult’s law is
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Ethanol + Acetone
- B. Benzene + Toluene
- C. Acetone + Chloroform
- D. Chloroethane + Bromoethane
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Q36
CHEMISTRY
Unit 6: Equilibrium
Hydrolysis of sucrose is given by the following reaction. 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 (2 sets)
- A. -8.314 J mol–1 K–1 × 300 K × ln(2 × 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(3 × 10^13)
- D. -8.314 J mol–1 K–1 × 300 K × ln(4 × 10^13)
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Q37
CHEMISTRY
Unit 19: Biomolecules
Sucrose on hydrolysis gives
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- A. β-D-Glucose + α-D-Fructose
- B. α-D-Glucose + β-D-Glucose
- C. α-D-Glucose + β-D-Fructose
- D. α-D-Fructose + β-D-Fructose
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Q38
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin only magnetic moment of Cr2+ ion is
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2020 (8 sets)
- A. 3.87 BM
- B. 4.90 BM
- C. 5.92 BM
- D. 2.84 BM
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Q39
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a natural polymer?
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- A. cis-1, 4-polyisoprene
- B. poly (Butadiene-styrene)
- C. polybutadiene
- D. poly (Butadiene-acrylonitrile)
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Q40
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
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- A. Serine
- B. Alanine
- C. Tyrosine
- D. Lysine
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Q41
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
Which of the following is a cationic detergent?
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- A. Sodium lauryl sulphate
- B. Sodium stearate
- C. Cetyltrimethyl ammonium bromide
- D. Sodium dodecylbenzene sulphonate
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Q42
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 (9 sets)
- A. 2 × 10^-13 M
- B. 2 × 10^-8 M
- C. 1 × 10^-13 M
- D. 1 × 10^8 M
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Q42
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
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 2 × 10^–13 M
- B. 2 × 10^–8 M
- C. 1 × 10^–13 M
- D. 1 × 10^8 M
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Q43
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Identify a molecule which does not exist.
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- A. He2
- B. Li2
- C. C2
- D. O2
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Q43
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Identify a molecule which does not exist.
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2020 (5 sets)
- A. He2
- B. Li2
- C. C2
- D. O2
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Q44
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. Iron
- B. Copper
- C. Calcium
- D. Potassium
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Q44
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. Iron
- B. Copper
- C. Calcium
- D. Potassium
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Q45
CHEMISTRY
Unit 2: Atomic Structure
The number of protons, neutrons and electrons in 175/71 Lu, respectively, are
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- A. 71, 104 and 71
- B. 104, 71 and 71
- C. 71, 71 and 104
- D. 175, 104 and 71
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Q45
CHEMISTRY
Unit 2: Atomic Structure
The number of protons, neutrons and electrons in 175/71Lu, respectively, are
↻ Repeated question — also appeared in
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- A. 71, 104 and 71
- B. 104, 71 and 71
- C. 71, 71 and 104
- D. 175, 104 and 71
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Q46
PHYSICS
Unit 15: Electromagnetic Waves
Light with an average flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20 cm2. The energy received by the surface during time span of 1 minute is :
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 10 × 10^3 J
- B. 12 × 10^3 J
- C. 24 × 10^3 J
- D. 48 × 10^3 J
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Q46
PHYSICS
Unit 4: Work Energy and Power
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 time span of 1 minute is:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. 10 × 10^3 J
- B. 12 × 10^3 J
- C. 24 × 10^3 J
- D. 48 × 10^3 J
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Q47
PHYSICS
Unit 19: Electronic Devices
For transistor action, which of the following statements is correct?
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- A. Base, emitter and collector regions should have same doping concentrations.
- B. Base, emitter and collector regions should have same size.
- C. Both emitter junction as well as the collector junction are forward biased.
- D. The base region must be very thin and lightly doped.
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Q49
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:
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- A. zero
- B. 0.5 N/C
- C. 1 N/C
- D. 5 N/C
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Q51
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
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 :
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- A. 1.7 A
- B. 2.05 A
- C. 2.5 A
- D. 25.1 A
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Q52
PHYSICS
Unit 9: Kinetic Theory of Gases
A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C. Its density is : (R = 8.3 J mol^-1 K^-1)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 0.5 kg/m^3
- B. 0.2 kg/m^3
- C. 0.1 kg/m^3
- D. 0.02 kg/m^3
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Q53
PHYSICS
Unit 1: Physics and Measurement
Taking into account of the significant figures, what is the value of 9.99 m – 0.0099 m?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 9.9801 m
- B. 9.98 m
- C. 9.980 m
- D. 9.9 m
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Q54
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 n dπ)
- B. 1 / (√2 n π d^2)
- C. 1 / (2 √2 n π d^2)
- D. 1 / (2 √2 n π d^2)
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Q55
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^-4 T m A^-1
- B. 8.0 × 10^-5 T m A^-1
- C. 2.4π × 10^-5 T m A^-1
- D. 2.4π × 10^-7 T m A^-1
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Q56
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 :
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 50 V
- B. 200 V
- C. 400 V
- D. zero
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Q57
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 (8 sets)
- A. 48 N
- B. 32 N
- C. 30 N
- D. 24 N
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Q58
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. metals
- B. insulators only
- C. semiconductors only
- D. insulators and semiconductors
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Q59
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. doubled
- B. four times
- C. one-fourth
- D. zero
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Q60
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 (9 sets)
- A. zero
- B. 0.5
- C. 1.0
- D. –1.0
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Q60
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 (9 sets)
- A. zero
- B. 0.5
- C. 1.0
- D. -1.0
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Q61
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?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 1.28 × 10^4 N/C
- B. 1.28 × 10^5 N/C
- C. 1.28 × 10^6 N/C
- D. 1.28 × 10^7 N/C
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Q61
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? (1/(4πε₀) = 9 × 10⁹ Nm²C⁻²)
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 1.28 × 10⁴ N/C
- B. 1.28 × 10⁵ N/C
- C. 1.28 × 10⁶ N/C
- D. 1.28 × 10⁷ N/C
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Q62
PHYSICS
Unit 5: Rotational Motion
Find the torque about the origin when a force of 3j N acts on a particle whose position vector is 2k m.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 6i Nm
- B. 6j Nm
- C. 6i Nm (negative)
- D. 6k Nm
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Q62
PHYSICS
Unit 5: Rotational Motion
Find the torque about the origin when a force of 3j N acts on a particle whose position vector is 2k m.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 6i Nm
- B. 6j Nm
- C. 6i Nm
- D. 6k Nm
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Q63
PHYSICS
Unit 12: Current Electricity
A charged particle having drift velocity of 7.5 × 10⁻⁴ m/s in an electric field of 3 × 10⁻¹⁰ V/m, has a mobility in m²V⁻¹s⁻¹ of:
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 2.25 × 10¹⁵
- B. 2.5 × 10⁶
- C. 2.5 × 10⁻⁶
- D. 2.25 × 10⁻¹⁵
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Q64
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 (8 sets)
- A. A/2μ
- B. 2A/μ
- C. μA
- D. A/2μ
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Q65
PHYSICS
Unit 8: Thermodynamics
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 (2 sets)
- A. 27/8
- B. 9/4
- C. 3/2
- D. 5/3
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Q66
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. ¹⁴⁴₅₆Ba
- B. ⁹¹₄₀Zr
- C. ¹⁰¹₃₆Kr
- D. ¹⁰³₃₆Kr
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Q67
PHYSICS
Unit 10: Oscillations and Waves
The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. π rad
- B. 3π/2 rad
- C. π/2 rad
- D. zero
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Q68
PHYSICS
Unit 12: Current Electricity
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 (6 sets)
- A. 1.0 × 10⁻² m
- B. 1.0 × 10⁻¹ m
- C. 1.5 × 10⁻¹ m
- D. 1.5 × 10⁻² m
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Q69
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. 2.5 g
- B. 5.0 g
- C. 10.0 g
- D. 20.0 g
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Q70
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:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. c : 1
- B. 1 : 1
- C. 1 : c
- D. 1 : c²
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Q71
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. double
- B. half
- C. four times
- D. one-fourth
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Q72
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:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 6.28 × 10⁻⁴ T
- B. 3.14 × 10⁻⁴ T
- C. 6.28 × 10⁻⁵ T
- D. 3.14 × 10⁻⁵ T
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Q73
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:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 360 m
- B. 340 m
- C. 320 m
- D. 300 m
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Q74
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. Hydrogen atom
- B. Singly ionised helium atom (He⁺)
- C. Deuteron atom
- D. Singly ionised neon atom (Ne⁺)
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Q75
PHYSICS
Unit 9: Kinetic Theory of Gases
The average thermal energy for a mono-atomic gas is:
↻ Repeated question — also appeared in
2020 (1 set)
- A. 1/2 kBT
- B. 3/2 kBT
- C. 5/2 kBT
- D. 7/2 kBT
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Q75
PHYSICS
Unit 9: Kinetic Theory of Gases
The average thermal energy for a mono-atomic gas is : (kB is Boltzmann constant and T, absolute temperature)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 1/2 kB T
- B. 3/2 kB T
- C. 5/2 kB T
- D. 7/2 kB T
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Q76
PHYSICS
Unit 3: Laws of 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:
- A. 33 cm
- B. 50 cm
- C. 67 cm
- D. 80 cm
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Q76
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. 33 cm
- B. 50 cm
- C. 67 cm
- D. 80 cm
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Q77
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:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 523 Hz
- B. 524 Hz
- C. 536 Hz
- D. 537 Hz
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Q77
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:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 523 Hz
- B. 524 Hz
- C. 536 Hz
- D. 537 Hz
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Q78
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. isothermal
- B. adiabatic
- C. isochoric
- D. isobaric
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Q79
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. 0.44 × 10^–13 C^2 N^–1 m^–2
- B. 1.77 × 10^–12 C^2 N^–1 m^–2
- C. 0.44 × 10^–10 C^2 N^–1 m^–2
- D. 5.00 C^2 N^–1 m^–2
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Q80
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 V
- B. 10^2 V
- C. 10^3 V
- D. 10^4 V
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Q81
PHYSICS
Unit 7: Properties of Solids and Liquids
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 :
↻ Repeated question — also appeared in
2020 (7 sets)
- A. MgL / AL1
- B. Mg(L1 - L) / AL
- C. MgL / AL
- D. MgL / A(L1 - L)
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Q82
PHYSICS
Unit 16: Optics
The Brewsters angle ib for an interface should be
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 0° < ib < 30°
- B. 30° < ib < 45°
- C. 45° < ib < 90°
- D. ib = 90°
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Q83
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. The acceleration of the system in terms of acceleration due to gravity (g) is :
↻ Repeated question — also appeared in
2020 (7 sets)
- A. g
- B. g/2
- C. g/5
- D. g/10
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Q84
PHYSICS
Unit 1: Physics and Measurement
Dimensions of stress are :
↻ Repeated question — also appeared in
2020 (6 sets)
- A. [MLT^–2]
- B. [ML^2T^–2]
- C. [ML^0T^–2]
- D. [ML^–1T^–2]
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Q85
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 :
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 0.01 mm
- B. 0.25 mm
- C. 0.5 mm
- D. 1.0 mm
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Q86
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. 6
- B. 0.6
- C. 0.06
- D. 0.006
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Q87
PHYSICS
Unit 12: Current Electricity
The color code of a resistance is given. The values of resistance and tolerance, respectively, are (Yellow, Violet, Brown, Gold)
- A. 470 kΩ, 5%
- B. 47 kΩ, 10%
- C. 4.7 kΩ, 5%
- D. 470 Ω, 5%
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Q88
PHYSICS
Unit 16: Optics
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is :
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 3.66 × 10^–7 rad
- B. 1.83 × 10^–7 rad
- C. 7.32 × 10^–7 rad
- D. 6.00 × 10^–7 rad
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Q89
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. forward bias only
- B. reverse bias only
- C. both forward bias and reverse bias
- D. increase in forward current
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Q90
PHYSICS
Unit 18: Atoms and Nuclei
The energy equivalent of 0.5 g of a substance is :
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 4.5 × 10^16 J
- B. 4.5 × 10^13 J
- C. 1.5 × 10^13 J
- D. 0.5 × 10^13 J
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Q91
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?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. only (a)
- B. (a) and (c)
- C. (b), (c) and (d)
- D. only (d)
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Q91
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.
↻ Repeated question — also appeared in
2020 (6 sets)
- A. only (a)
- B. (a) and (c)
- C. (b), (c) and (d)
- D. only (d)
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Q92
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option.
- A. (ii) (iii) (i) (iv)
- B. (iii) (i) (iv) (ii)
- C. (iv) (ii) (i) (iii)
- D. (i) (ii) (iv) (iii)
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Q92
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option.
Column-I: (a) Organ of Corti, (b) Cochlea, (c) Eustachian tube, (d) Stapes
Column-II: (i) Connects middle ear and pharynx, (ii) Coiled part of the labyrinth, (iii) Attached to the oval window, (iv) Located on the basilar membrane
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (1) (ii) (iii) (i) (iv)
- B. (2) (iii) (i) (iv) (ii)
- C. (3) (iv) (ii) (i) (iii)
- D. (4) (i) (ii) (iv) (iii)
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Q93
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to immunity.
↻ Repeated question — also appeared in
2020 (3 sets)
- A. When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called “Active immunity”.
- B. When ready-made antibodies are directly given, it is called “Passive immunity”.
- C. Active immunity is quick and gives full response.
- D. Foetus receives some antibodies from mother, it is an example for passive immunity.
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Q94
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. (a) and (b)
- B. (c) and (d)
- C. (a), (b) and (d)
- D. only (d)
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Q95
BIOLOGY
Unit 4: Plant Physiology
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 2 molecules of 3-C compound
- B. 1 molecule of 3-C compound
- C. 1 molecule of 6-C compound
- D. 1 molecule of 4-C compound and 1 molecule of 2-C compound
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Q96
BIOLOGY
Unit 5: Human Physiology
The infectious stage of Plasmodium that enters the human body is
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Trophozoites
- B. Sporozoites
- C. Female gametocytes
- D. Male gametocytes
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Q97
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements about inclusion bodies is incorrect?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. They are not bound by any membrane
- B. These are involved in ingestion of food particles
- C. They lie free in the cytoplasm
- D. These represent reserve material in cytoplasm
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Q98
BIOLOGY
Unit 3: Cell Structure and Function
Dissolution of the synaptonemal complex occurs during
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Pachytene
- B. Zygotene
- C. Diplotene
- D. Leptotene
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Q99
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Ray florets have
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Inferior ovary
- B. Superior ovary
- C. Hypogynous ovary
- D. Half inferior ovary
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Q100
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. Acetocarmine in bright blue light
- B. Ethidium bromide in UV radiation
- C. Acetocarmine in UV radiation
- D. Ethidium bromide in infrared radiation
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Q101
BIOLOGY
Unit 6: Reproduction
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. ZIFT and IUT
- B. GIFT and ZIFT
- C. ICSI and ZIFT
- D. GIFT and ICSI
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Q102
BIOLOGY
Unit 6: Reproduction
Select the option including all sexually transmitted diseases.
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Gonorrhoea, Syphilis, Genital herpes
- B. Gonorrhoea, Malaria, Genital herpes
- C. AIDS, Malaria, Filaria
- D. Cancer, AIDS, Syphilis
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Q103
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to transport of oxygen
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Binding of oxygen with haemoglobin is mainly related to partial pressure of O2
- B. Partial pressure of CO2 can interfere with O2 binding with haemoglobin
- C. Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin
- D. Low pCO2 in alveoli favours the formation of oxyhaemoglobin
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Q104
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the incorrect statement.
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Heart wood does not conduct water but gives mechanical support
- B. Sapwood is involved in conduction of water and minerals from root to leaf
- C. Sapwood is the innermost secondary xylem and is lighter in colour
- D. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
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Q105
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the wrong statement with regard to Restriction Enzymes.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Each restriction enzyme functions by inspecting the length of a DNA sequence.
- B. They cut the strand of DNA at palindromic sites.
- C. They are useful in genetic engineering.
- D. Sticky ends can be joined by using DNA ligases.
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Q105
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the wrong statement with regard to Restriction Enzymes.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Each restriction enzyme functions by inspecting the length of a DNA sequence.
- B. They cut the strand of DNA at palindromic sites.
- C. They are useful in genetic engineering.
- D. Sticky ends can be joined by using DNA ligases.
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Q106
BIOLOGY
Unit 1: Diversity in Living World
Floridean starch has structure similar to
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Starch and cellulose
- B. Amylopectin and glycogen
- C. Mannitol and algin
- D. Laminarin and cellulose
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Q106
BIOLOGY
Unit 1: Diversity in Living World
Floridean starch has structure similar to
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Starch and cellulose
- B. Amylopectin and glycogen
- C. Mannitol and algin
- D. Laminarin and cellulose
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Q107
BIOLOGY
Unit 9: Biotechnology and Its Applications
Choose the correct pair from the following
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Ligases - Join the two DNA molecules
- B. Polymerases - Break the DNA into fragments
- C. Nucleases - Separate the two strands of DNA
- D. Exonucleases - Make cuts at specific positions within DNA
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Q107
BIOLOGY
Unit 9: Biotechnology and Its Applications
Choose the correct pair from the following
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Ligases - Join the two DNA molecules
- B. Polymerases - Break the DNA into fragments
- C. Nucleases - Separate the two strands of DNA
- D. Exonucleases - Make cuts at specific positions within DNA
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Q108
BIOLOGY
Unit 7: Genetics and Evolution
Embryological support for evolution was disapproved by
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Karl Ernst von Baer
- B. Alfred Wallace
- C. Charles Darwin
- D. Oparin
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Q108
BIOLOGY
Unit 7: Genetics and Evolution
Embryological support for evolution was disapproved by
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Karl Ernst von Baer
- B. Alfred Wallace
- C. Charles Darwin
- D. Oparin
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Q109
BIOLOGY
Unit 7: Genetics and Evolution
The first phase of translation is
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Binding of mRNA to ribosome
- B. Recognition of DNA molecule
- C. Aminoacylation of tRNA
- D. Recognition of an anti-codon
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Q109
BIOLOGY
Unit 3: Cell Structure and Function
The first phase of translation is
- A. Binding of mRNA to ribosome
- B. Recognition of DNA molecule
- C. Aminoacylation of tRNA
- D. Recognition of an anti-codon
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Q110
BIOLOGY
Unit 6: Reproduction
The plant parts which consist of two generations - one within the other (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 (5 sets)
- A. (a) only
- B. (a), (b) and (c)
- C. (c) and (d)
- D. (a) and (d)
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Q111
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. Zero
- B. One
- C. Two
- D. Three
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Q112
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option.
Column-I (a) Floating Ribs (b) Acromion (c) Scapula (d) Glenoid cavity
Column-II (i) Located between second and seventh ribs (ii) Head of the Humerus (iii) Clavicle (iv) Do not connect with the sternum
↻ Repeated question — also appeared in
2020 (1 set)
- A. (ii) (iv) (i) (iii)
- B. (i) (iii) (ii) (iv)
- C. (iii) (ii) (iv) (i)
- D. (iv) (iii) (i) (ii)
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Q113
BIOLOGY
Unit 5: Human Physiology
Match the following diseases with the causative organism and select the correct option.
Column-I (a) Typhoid (b) Pneumonia (c) Filariasis (d) Malaria
Column-II (i) Wuchereria (ii) Plasmodium (iii) Salmonella (iv) Haemophilus
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2020 (1 set)
- A. (i) (iii) (ii) (iv)
- B. (iii) (iv) (i) (ii)
- C. (ii) (i) (iii) (iv)
- D. (iv) (i) (ii) (iii)
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Q114
BIOLOGY
Unit 10: Ecology and Environment
Montreal protocol was signed in 1987 for control of
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Transport of Genetically modified organisms from one country to another
- B. Emission of ozone depleting substances
- C. Release of Green House gases
- D. Disposal of e-wastes
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Q115
BIOLOGY
Unit 5: Human Physiology
The QRS complex in a standard ECG represents
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Repolarisation of auricles
- B. Depolarisation of auricles
- C. Depolarisation of ventricles
- D. Repolarisation of ventricles
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Q116
BIOLOGY
Unit 4: Plant Physiology
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Cytokinin
- B. Gibberellin
- C. Ethylene
- D. Abscisic acid
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Q117
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?
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2020 (7 sets)
- A. 4
- B. 2
- C. 14
- D. 8
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Q118
BIOLOGY
Unit 1: Diversity in Living World
Bilaterally symmetrical and acoelomate animals are exemplified by
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Ctenophora
- B. Platyhelminthes
- C. Aschelminthes
- D. Annelida
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Q119
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. Lining of intestine
- B. Ducts of salivary glands
- C. Proximal convoluted tubule of nephron
- D. Eustachian tube
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Q120
BIOLOGY
Unit 3: Cell Structure and Function
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Endoplasmic reticulum
- B. Peroxisomes
- C. Golgi bodies
- D. Polysomes
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Q121
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-II to Cytb6f complex
- B. Cytb6f complex to PS-I
- C. PS-I to NADP+
- D. PS-I to ATP synthase
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Q122
BIOLOGY
Unit 4: Plant Physiology
Match the following concerning essential elements and their functions in plants
(a) Iron (b) Zinc (c) Boron (d) Manganese
(i) Photolysis of water (ii) Pollen germination (iii) Required for chlorophyll biosynthesis (iv) IAA biosynthesis
↻ Repeated question — also appeared in
2020 (6 sets)
- A. (ii) (i) (iv) (iii)
- B. (iv) (iii) (ii) (i)
- C. (iii) (iv) (ii) (i)
- D. (iv) (i) (ii) (iii)
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Q122
BIOLOGY
Unit 4: Plant Physiology
Match the following concerning essential elements and their functions in plants:
(a) Iron (i) Photolysis of water
(b) Zinc (ii) Pollen germination
(c) Boron (iii) Required for chlorophyll biosynthesis
(d) Manganese (iv) IAA biosynthesis
↻ Repeated question — also appeared in
2020 (6 sets)
- A. (1) (ii) (i) (iv) (iii)
- B. (2) (iv) (iii) (ii) (i)
- C. (3) (iii) (iv) (ii) (i)
- D. (4) (iv) (i) (ii) (iii)
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Q123
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The roots that originate from the base of the stem are
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Fibrous roots
- B. Primary roots
- C. Prop roots
- D. Lateral roots
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Q123
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The roots that originate from the base of the stem are
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Fibrous roots
- B. Primary roots
- C. Prop roots
- D. Lateral roots
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Q124
BIOLOGY
Unit 7: Genetics and Evolution
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask
↻ Repeated question — also appeared in
2020 (6 sets)
- A. CH4, H2, NH3 and water vapor at 800°C
- B. CH3, H2, NH4 and water vapor at 800°C
- C. CH4, H2, NH3 and water vapor at 600°C
- D. CH3, H2, NH3 and water vapor at 600°C
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Q124
BIOLOGY
Unit 7: Genetics and Evolution
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask
↻ Repeated question — also appeared in
2020 (6 sets)
- A. CH4, H2, NH3 and water vapor at 800°C
- B. CH3, H2, NH4 and water vapor at 800°C
- C. CH4, H2, NH3 and water vapor at 600°C
- D. CH3, H2, NH3 and water vapor at 600°C
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Q125
CHEMISTRY
Unit 19: Biomolecules
Identify the basic amino acid from the following.
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2020 (5 sets)
- A. Tyrosine
- B. Glutamic Acid
- C. Lysine
- D. Valine
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Q125
CHEMISTRY
Unit 19: Biomolecules
Identify the basic amino acid from the following.
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Tyrosine
- B. Glutamic Acid
- C. Lysine
- D. Valine
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Q126
BIOLOGY
Unit 4: Plant Physiology
The process of growth is maximum during
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Log phase
- B. Lag phase
- C. Senescence
- D. Dormancy
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Q126
BIOLOGY
Unit 4: Plant Physiology
The process of growth is maximum during
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Log phase
- B. Lag phase
- C. Senescence
- D. Dormancy
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Q127
BIOLOGY
Unit 5: Human Physiology
Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Uremia and Ketonuria
- B. Uremia and Renal Calculi
- C. Ketonuria and Glycosuria
- D. Renal calculi and Hyperglycaemia
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Q128
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Haemophilia – Y linked
- B. Phenylketonuria – Autosomal dominant trait
- C. Sickle cell anaemia – Autosomal recessive trait, chromosome-11
- D. Thalassemia – X linked
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Q129
BIOLOGY
Unit 1: Diversity in Living World
Strobili or cones are found in
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Salvinia
- B. Pteris
- C. Marchantia
- D. Equisetum
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Q130
BIOLOGY
Unit 7: Genetics and Evolution
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. The gene (I) has three alleles.
- B. A person will have only two of the three alleles.
- C. When IA and IB are present together, they express same type of sugar.
- D. Allele ‘i’ does not produce any sugar.
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Q131
BIOLOGY
Unit 5: Human Physiology
Identify the correct statement with reference to human digestive system.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. IIeum opens into small intestine
- B. Serosa is the innermost layer of the alimentary canal
- C. IIeum is a highly coiled part
- D. Vermiform appendix arises from duodenum
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Q132
BIOLOGY
Unit 5: Human Physiology
Which of the following would help in prevention of diuresis?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. More water reabsorption due to undersecretion of ADH
- B. Reabsorption of Na+ and water from renal tubules due to aldosterone
- C. Atrial natriuretic factor causes vasoconstriction
- D. Decrease in secretion of renin by JG cells
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Q133
BIOLOGY
Unit 3: Cell Structure and Function
Match the following with respect to meiosis:
(a) Zygotene (i) Terminalization
(b) Pachytene (ii) Chiasmata
(c) Diplotene (iii) Crossing over
(d) Diakinesis (iv) Synapsis
↻ Repeated question — also appeared in
2020 (1 set)
- A. (1) (iii) (iv) (i) (ii)
- B. (2) (iv) (iii) (ii) (i)
- C. (3) (i) (ii) (iv) (iii)
- D. (4) (ii) (iv) (iii) (i)
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Q134
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. Gibberellic acid
- B. Abscisic acid
- C. Phenolic acid
- D. Para-ascorbic acid
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Q135
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. (1) (iv) (i) (ii) (iii)
- B. (2) (iii) (ii) (i) (iv)
- C. (3) (ii) (iii) (iv) (i)
- D. (4) (i) (ii) (iii) (iv)
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Q136
CHEMISTRY
Unit 19: Biomolecules
Match the following:
(a) Inhibitor of catalytic activity (i) Ricin
(b) Possess peptide bonds (ii) Malonate
(c) Cell wall material in fungi (iii) Chitin
(d) Secondary metabolite (iv) Collagen
- A. (1) (ii) (iv) (iii) (i)
- B. (2) (iii) (i) (iv) (ii)
- C. (3) (iii) (iv) (i) (ii)
- D. (4) (ii) (iii) (i) (iv)
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Q137
BIOLOGY
Unit 9: Biotechnology and Its Applications
The sequence that controls the copy number of the linked DNA in the vector, is termed
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Selectable marker
- B. Ori site
- C. Palindromic sequence
- D. Recognition site
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Q137
BIOLOGY
Unit 9: Biotechnology and Its Applications
The sequence that controls the copy number of the linked DNA in the vector, is termed
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Selectable marker
- B. Ori site
- C. Palindromic sequence
- D. Recognition site
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Q138
BIOLOGY
Unit 10: Ecology and Environment
Snow-blindness in Antarctic region is due to
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Freezing of fluids in the eye by low temperature
- B. Inflammation of cornea due to high dose of UV-B radiation
- C. High reflection of light from snow
- D. Damage to retina caused by infra-red rays
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Q138
BIOLOGY
Unit 10: Ecology and Environment
Snow-blindness in Antarctic region is due to
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Freezing of fluids in the eye by low temperature
- B. Inflammation of cornea due to high dose of UV-B radiation
- C. High reflection of light from snow
- D. Damage to retina caused by infra-red rays
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Q139
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. 1.5 million
- B. 20 million
- C. 50 million
- D. 7 million
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Q139
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. 1.5 million
- B. 20 million
- C. 50 million
- D. 7 million
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Q140
BIOLOGY
Unit 8: Biology and Human Welfare
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Out crossing
- B. Mutational breeding
- C. Cross breeding
- D. Inbreeding
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Q140
BIOLOGY
Unit 8: Biology and Human Welfare
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Out crossing
- B. Mutational breeding
- C. Cross breeding
- D. Inbreeding
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Q141
BIOLOGY
Unit 10: Ecology and Environment
Which of the following regions of the globe exhibits highest species diversity?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Western Ghats of India
- B. Madagascar
- C. Himalayas
- D. Amazon forests
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Q141
BIOLOGY
Unit 10: Ecology and Environment
Which of the following regions of the globe exhibits highest species diversity?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Western Ghats of India
- B. Madagascar
- C. Himalayas
- D. Amazon forests
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Q142
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
Column-I: (a) 6-15 pairs of gill slits, (b) Heterocercal caudal fin, (c) Air Bladder, (d) Poison sting
Column-II: (i) Trygon, (ii) Cyclostomes, (iii) Chondrichthyes, (iv) Osteichthyes
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (1) (ii) (iii) (iv) (i)
- B. (2) (iii) (iv) (i) (ii)
- C. (3) (iv) (ii) (iii) (i)
- D. (4) (i) (iv) (iii) (ii)
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Q143
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following statements is not correct?
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2020 (3 sets)
- A. In man insulin is synthesised as a proinsulin
- B. The proinsulin has an extra peptide called C-peptide.
- C. The functional insulin has A and B chains linked together by hydrogen bonds.
- D. Genetically engineered insulin is produced in E.Coli.
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Q144
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the organism with its use in biotechnology.
(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. (1) (ii) (iv) (iii) (i)
- B. (2) (iv) (iii) (i) (ii)
- C. (3) (iii) (ii) (iv) (i)
- D. (4) (iii) (iv) (i) (ii)
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Q145
BIOLOGY
Unit 1: Diversity in Living World
Which of the following pairs is of unicellular algae?
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2020 (8 sets)
- A. Laminaria and Sargassum
- B. Gelidium and Gracilaria
- C. Anabaena and Volvox
- D. Chlorella and Spirulina
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Q175
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. Chitin, cholesterol
- B. Glycerol, trypsin
- C. Cellulose, lecithin
- D. Inulin, insulin
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