CUET 2025 Chemistry MCQs 100 Questions for CUET Exam

Chemistry MCQ Question Answers for CUET 2025

Chemistry MCQs– Practice the Chemistry Multiple Choice Questions suitable for various Entrance Exams including CUET. Learn and practice Chemistry questions and answers. Chemistry MCQ questions are very helpful for various competitive exams. CUET is a Common University Entrance Test that is now mandatory to take admission to Central Universities in India. Chemistry MCQ questions are based on the latest CUET 2025 exam pattern and other entrance exams, so that you can have a fair idea about exam trends that will be followed for various entrance exams.

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1. Bromination of isobutene gives as major product

a.isobutyl bromide

b.None of the above

c.n-butyl bromide

d.tert. butyl bromide

2. All the radioactive changes are of

a.Zero order

b.Third order

c.Second order

d.First order

3. N-nitrosoamine when warmed with phenol and conc. sulphuric acid gives green colouration. The amine is

a.quaternary salt

b.tert. amine

c.p-amine

d.secondary amine

4. Which of the following will give an aldehyde on oxidation?

a.Methoxy ethane

b.1 propanal

c.2 methyl propane

d.2 methanal

5. Wurtz reaction cannot be used for the preparation of

a.both methane and odd no. of C-atoms

b.alkanes containing odd no. of C-atoms

c.alkanes containing even no. of C-atoms

d.methane

6. Half-life period of a zero order reaction is

a.independent of the conc.

b.directly proportional to the initial conc.

c.inversely proportional to the conc.

d.directly proportional to cube of the conc.

7. Among the alkanes with an increase in mol wt…….

a.f.pt. decreases

b.b.pt increases

c.m.pt. decreases

d.density decreases

8. Art of electroplating was enunciated by

a.Kohlorausch

b.Brugantally

c.Ampere

d.Einstein

9. Propene on treatment with dil. sulphuric acid gives

a.A and B

b.1-propanol

c.None of above

d.2-propanol

10. Reduction of which of the following will give only ethyl alcohol?

a.methyl methanoate

b.propyl methanoate

c.formic acid

d.ethyl acetate

11. A mole of electrons is the same as

a.one

b.faraday

c.curie

d.ampere-second

12. The number of electrons that are shared between two atoms having a triple bond are

a.5

b.7

c.3

d.6

13. Aniline condenses with benzaldehyde to give

a.N benzal aniline

b.benzoyl aniline

c.N benzoyl aniline

d.benzal aniline

14. RCOCl reacts with R MgBr to yield

a.ketone

b.primary alcohol

c.tertiary alcohol

d.secondary alcohol

15. 1 Joule is equal to

a.0.239 Cal

b.1.390 Cal

c.2.39 Cal

d.0.04184 Cal

16. Equivalent weight of ammonia is

a.14/3

b.2.7

c.17

d.31

17. The element with maximum number of electrons in the valence shell has atomic number

a.2

b.3

c.15

d.9

18. Emission is caused by the transformation of one neutron into a proton. This results in the formation of a new element having

a.nuclear charge lower by one unit

b.lower nuclear charge

c.same nuclear charge

d.nuclear charge higher by one unit

19. Between two elements A and B, the electronegativity difference is 2.0. The per cent ionic character of AB is

a.35

b.86

c.46

d.15

20. The age of most ancient geological formation is estimated by

a.Carbon 14 dating method

b.Potassium-Argon method

c.Uranium lead method

d.Radium-silicon method

21. Hydrogen bomb is based on the phenomenon of

a.Nuclear explosion

b.Chemical reaction

c.Nuclear fusion

d.Nuclear fission

22. Acetic acid exists as dimer in benzene due to

a.condensation reaction

b.presence of hydrogen atom at α-carbon

c.hydrogen bonding

d.presence of carbonyl group

23. Ethyl alcohol on treatment with red P and HI under pressure gives

a.ethyne

b.methane

c.acetaldehyde

d.ethane

24. An azeotrope is one that

a.can be separated by distillation at critical solution temperature

b.cannot be separated by distillation

c.can be separated by distillation below critical solution temperature

d.can be separated by distillation above critical solution temperature

25. A person requires 2870 Kcal of energy for leading a normal life. If heat of combustion of cane sugar is -1349 Kcal then he must consume……kg of cane sugar daily.

a.448

b.142

c.728

d.224

26. Which of the following can reduce Tollens reagent but no Fehlings soln.?

a.Formaldehyde

b.Benzaldehyde

c.Acetaldehyde

d.Acetone

27. Salt Bridge is used because it

a.enhances the flow of electrons by overcoming liquid junction potential

b.provides the extra ions

c.forms insoluble precipitates with the electrolytes in the two half cells

d.maintains the electrical neutrality of the two half cells

28. The half-life of a radioactive element is 50 days. How long will it take far its activity reduce to 1/4 of it original value?

a.50 days

b.25 days

c.100 days

d.75 days

29. In an aqueous solution of sulphuric acid, mole fraction of water is 0.85. The molality of the solution is

a.8.9 m

b.7.9 m

c.14 m

d.9.8 m

30. Heisenberg test can be used to distinguish between

a.All the above

b.primary amines, secondary amines and tertiary amine

c.primary amines and tertiary amines

d.primary amines and secondary amines

31. Which of the following is absorbed by HCl?

a.Ethylene

b.Ethanamine

c.Methyl alcohol

d.Acetylene

32. If mercury is used at cathode during the electrolysis of aqueous NaCl the ions discharged at the cathode are

a.none of these

b.hydroxide

c.chloride

d.sodium

33. Vinegar contains

a.10 to 12% acetic acid

b.7 to 8% acetic acid

c.19% acetic acid

d.100% acetic acid

34. The apparatus used for measuring the heat changes is known as

a.Thermometer

b.Calorimeter

c.Ammeter

d.Voltmeter

35. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.6 days

b.18 days

c.2 days

d.3 days

36. Which of the following will have maximum entropy?

a.Silver

b.Diamond

c.Helium

d.Argon

37. Alcohols have higher boiling point than alkanes of the corresponding molecular mass because

a.alcohols have ionic bond

b.alcohols contains –OH group

c.alcohols are miscible with water

d.alcohols have hydrogen bond

38. In which of the following octet rule is not applicable?

a.p-block

b.Transition elements

c.Alkaline earth metal

d.Alkali earth metal

39. Half-life of a first order reaction is 35 min. The time required to reduce its concentration to 12.5% is

a.50 min

b.105 min

c.70 min

d.125 min

40. Radium and chlorine combine to form radium chloride, the compound is

a.thrice as radioactive as the radium content

b.no longer radioactive

c.as radioactive as the radium content

d.half as radioactive as the radium content

41. If temperature is kept constant during the reaction, the process is said to be….

a.Isothermal

b.Adiabatic

c.none of the above

d.Isobaric

42. Aniline reacts with dl. HCl and HONO at 00C to form

a.benzene

b.azo compound

c.nitro compound

d.diazo compound

43. The maximum number of molecules are in:

a.48 gram of ethyl alcohol

b.14 gram of carbon dioxide

c.36 gram of water

d.52 gram of nitrogen peroxide

44. The bond angle in ammonia is

a.110 degree

b.106 degree

c.99 degree

d.107 degree

45. Which of the following is a carcinogen?

a.Benzenediazonium chloride

b.Aniline

c.Ethyl amine

d.N-nitroso amine

46. On mixing 1 mole of ethyl alcohol with 1 mole of acetic acid at 298 K the equilibrium concentration of ester and water becomes 2/3 moles each. If 3 moles of alcohol is mixed with 1 mole of acid, the concentration of ester in moles at equilibrium will be

a.0.9

b.2.2

c.0.09

d.1.1

47. Which of the following acids is manufactured using sawdust?

a.Oxalic acid

b.Citric acid

c.Acetic acid

d.Butyric acid

48. Ammonium acetate on heating decomposes to give

a.acetylamine

b.amine

c.acetamide

d.formamide

49. Acid present in the lemon is

a.tartaric acid

b.lactic acid

c.acrylic acid

d.citric acid

50. Which of the following carbonium ions is the most stable?

a.triphenyl methyl

b.All the above

c.benzyl

d.diphenyl methyl

51. Schiffs bax is obtaind by the action of

a.p-amines with acid anhydrides

b.p-amines with aldehydes

c.All the above

d.p-amines with acid chloride

52. In Lyman series an electron jumps from higher energy level to

a.K energy level

b.L energy level

c.M energy level

d.N energy level

53. In the case of o-chlorophenol there exist

a.both inter and intramolecular hydrogen bonding

b.intramolecular hydrogen bonding

c.intermolecular covalent bonding

d.no hydrogen bonding

54. On passing one faraday of electricity through molten lead (II) bromide, amount of bromine obtained is

a.3 mole

b.5 gm mole

c.1 gm equivalent

d.1 mole gm atom

55. In a spontaneous irreversible process, the total entropy of the system & its surroundings

a.is constant

b.is zero

c.decreases

d.increases

56. Which of the following is not a diatomic molecule?

a.Nitrogen

b.Iodine

c.Phosphorus

d.Oxygen

57. Radio-activity was discovered by

a.Henry Becquerel

b.J.J. Thomson

c.Rutherford

d.Madame Curie

58. Amongst HX, the maximum dipole moment is of

a.HI

b.HF

c.HBr

d.HCl

59. Once the equilibrium is reached under given condition:

a.Conc. of products remains same

b.Conc. remains the same in spite of the change in temperature

c.Conc. of all the substances presents do not change

d.Conc. of reactants remains same

60. On increasing the temperature by 10 K in the case of slow reactions

a.activation energy increases

b.value of rate constant increases

c.energy of activation decreases

d.number of collisions get doubled

61. Which will have the maximum solubility in water?

a.Tert. butyl alcohol

b.Methanol

c.1 butanol

d.Isobutyl alcohol

62. The exchange of particles considered responsible for keeping the nucleons together are

a.meson

b.positron

c.electron

d.neutron

63. The hydrogen halide which has maximum boiling point is

a.HBr

b.HF

c.HI

d.HCl

64. Williamsons synthesis is used for preparing

a.ether

b.amines

c.ester

d.alcohol

65. An electrophile is a/an

a.Lewis acid

b.Lewis base

c.Both A and B

d.electron deficient species

66. Which of the following is a sedative?

a.Benzaldehyde

b.Paraldehyde

c.Paraformaldehyde

d.Metaldehyde

67. Which of the following shows positive deviation from Raoults law?

a.Acetone and chloroform

b.Benzene and toluene

c.Ethyl alcohol and cyclohexane

d.Acetone and ethyl alcohol

68. In neopentane the number of primary carbon atoms are

a.4

b.1

c.2

d.5

69. Which of the following solutions will have the lowest freezing point?

a.1% aqueous solution of sodium chloride

b.1% aqueous solution of urea

c.1% aqueous solution of fructose

d.1% aqueous solution of methyl alcohol

70. Which of the following has minimum boiling point?

a.isopentane

b.n-pentane

c.neopentane

d.both A and B

71. How many electrons can fit into the sub-shell for which n = 3 and l = 1?

a.16

b.24

c.5

d.6

72. The number of moles of NaCl in 3 litres of the 3 M solution is

a.27

b.5

c.36

d.9

73. Nobels oil is

a.glycerol trinitrate

b.glycerol

c.trinitroglycol

d.dinitro glycerine

74. Electrochemical equivalent is the mass of the element liberated during electrolysis when

a.1 amp. current for 1 hrs is passed

b.3 amp current is passed

c.1 coulomb electricity is passed

d.2 faraday electricity is passed

75. Which of the following has dipole moment?

a.Both A and B

b.cis-2-butene

c.1-propene

d.trans-2-butene

76. Schiffs base on reduction give

a.p-amine

b.aniline

c.tert. amine

d.sec. amine

77. Calcium acetate on heating gives

a.ethane

b.pentane

c.acetic anhydride

d.acetone

78. When a radioactive substance is subjected to a vacuum, the rate of disintegration per second

a.is not affected

b.increases only if the products are gaseous

c.decreases

d.increase considerably

79. Out of the following, the weakest interact are involved in

a.Van der Waals interaction

b.ionic bond

c.polar covalent bond

d.hydrogen bond

80. In the case of exothermic reactions equilibrium constant K

a.remains unchanged with temperature

b.depends on the nature

c.decreases with temperature

d.increases with pressure

81. Mesitylene is

a.1, 3, 4 trimethyl benzene

b.2, 2, 4 trimethyl benzene

c.2, 3, 5 trimethyl benzene

d.1, 3, 5 trimethyl benzene

82. Calcium formate of heating gives

a.formaldehyde

b.methanoic anhydride

c.banzaldehyde

d.formic acid

83. On burning hydrogen in an atmosphere of chlorine, 1.65 gm of HCl was obtained and 1 Kcal of heat was liberated. The heat of formation of HCl should be:

a.500 cal/mol

b.-21.12 Kcal/mol

c.500 cal/gm

d.-44.2 Kcal/mol

84. In acetylene C-C-H bond angle is

a.144 degree

b.180 degree

c.90 degree

d.96 degree

85. Shape of the carboxyl group is

a.planar triangular

b.tetrahedral

c.octahedral

d.pyramidal

86. The rate of chemical reaction depends on the nature of chemical reactants because

a.energy of activation differs from one reaction to another

b.all the above

c.some are solid at room temperature

d.some are coloured

87. The chemical system in equilibrium is not affected by

a.changing the temperature

b.increase in the concentration of reactants

c.change in the concentration of products

d.addition of a catalyst

88. Reaction between silver nitrate and sodium chloride goes to completion because

a.silver chloride is sparingly soluble in water

b.solubility of silver nitrate increases with sodium chloride

c.the reaction is instantaneous

d.silver nitrate is insoluble in water

89. As the alkyl part goes on increasing in alcohol the solubility of alcohol in water

a.goes on increasing

b.remains constant

c.decreases

d.may increase or decrease

90. An electrochemical cell can be changed into an electrolytic cell by

a.providing higher potential from outside

b.reversing the electrodes

c.changing the conc. of the electrolytes

d.changing the electrolytes in two half cells

91. The number of unpaired electrons in fluorine atoms is/are

a.2

b.0

c.1

d.4

92. Shape of amines is

a.square planar

b.pyramidal

c.planar triangular

d.tetrahedral

93. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.2

b.25

c.3.3

d.2.5

94. Equilibrium constant changes with

a.temperature

b.both temperature and concentration

c.time

d.pressure

95. In substitution reactions of tertiary halide, the ionisation of halogen atom as negative ion is facilitated by

a.free radical

b.electron attracting group

c.All the above

d.electron repelling group

96. In isopentane the number of secondary carbon atom is

a.2

b.1

c.3

d.0

97. Formic acid is prepared by distilling glycerol with

a.oxalic acid at 240 degree Centigrade

b.tartaric acid at 10 degree Centigrade

c.oxalic acid at 110 degree Centigrade

d.lactic acid at 50 degree Centigrade

98. A mixture of 1-chloropropane and 2-chloropropane is treated with alcoholic KOH. The resulting mixture will have

a.1-propanol

b.2-propene

c.a mixture of 1-propene and 2-propene

d.1-propene

99. Cobalt present along with iron in the synthesis of ammonia acts as

a.autocatalyst

b.induced catalyst

c.inhibitor

d.promoter

100. Carbinol is

a.ethyl alcohol

b.1-butanol

c.2-propanol

d.methyl alcohol

CUET 2025 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2025

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