CUET 2026 Chemistry MCQs 100 Questions for CUET Exam

Chemistry MCQ Question Answers for CUET 2026

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 2026 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. Equivalent weight of ammonia is

a.2.7

b.17

c.31

d.14/3

2. The bond angle in ammonia is

a.99 degree

b.107 degree

c.106 degree

d.110 degree

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

a.reversing the electrodes

b.providing higher potential from outside

c.changing the conc. of the electrolytes

d.changing the electrolytes in two half cells

4. Mesitylene is

a.1, 3, 5 trimethyl benzene

b.2, 2, 4 trimethyl benzene

c.2, 3, 5 trimethyl benzene

d.1, 3, 4 trimethyl benzene

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

a.electron attracting group

b.electron repelling group

c.free radical

d.All the above

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

a.1% aqueous solution of sodium chloride

b.1% aqueous solution of fructose

c.1% aqueous solution of methyl alcohol

d.1% aqueous solution of urea

7. The maximum number of molecules are in:

a.36 gram of water

b.52 gram of nitrogen peroxide

c.14 gram of carbon dioxide

d.48 gram of ethyl alcohol

8. Which of the following will have maximum entropy?

a.Argon

b.Silver

c.Diamond

d.Helium

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

a.solubility of silver nitrate increases with sodium chloride

b.silver chloride is sparingly soluble in water

c.silver nitrate is insoluble in water

d.the reaction is instantaneous

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

a.decreases

b.increases

c.is constant

d.is zero

11. The hydrogen halide which has maximum boiling point is

a.HI

b.HCl

c.HBr

d.HF

12. An electrophile is a/an

a.Lewis acid

b.Both A and B

c.Lewis base

d.electron deficient species

13. Once the equilibrium is reached under given condition:

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

b.Conc. of reactants remains same

c.Conc. of products remains same

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

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

a.3 mole

b.1 gm equivalent

c.1 mole gm atom

d.5 gm mole

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

a.inhibitor

b.induced catalyst

c.promoter

d.autocatalyst

16. Amongst HX, the maximum dipole moment is of

a.HCl

b.HI

c.HBr

d.HF

17. 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.-44.2 Kcal/mol

b.-21.12 Kcal/mol

c.500 cal/mol

d.500 cal/gm

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

a.all the above

b.some are solid at room temperature

c.some are coloured

d.energy of activation differs from one reaction to another

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

a.2-propene

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

c.1-propanol

d.1-propene

20. Wurtz reaction cannot be used for the preparation of

a.alkanes containing odd no. of C-atoms

b.alkanes containing even no. of C-atoms

c.methane

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

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

a.All the above

b.triphenyl methyl

c.diphenyl methyl

d.benzyl

22. 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.142

b.728

c.224

d.448

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

a.tert. amine

b.quaternary salt

c.p-amine

d.secondary amine

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

a.energy of activation decreases

b.value of rate constant increases

c.activation energy increases

d.number of collisions get doubled

25. Shape of the carboxyl group is

a.planar triangular

b.octahedral

c.tetrahedral

d.pyramidal

26. Which of the following is a carcinogen?

a.Aniline

b.Ethyl amine

c.N-nitroso amine

d.Benzenediazonium chloride

27. Which of the following is a sedative?

a.Metaldehyde

b.Paraldehyde

c.Benzaldehyde

d.Paraformaldehyde

28. Shape of amines is

a.tetrahedral

b.pyramidal

c.planar triangular

d.square planar

29. 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.100 days

c.25 days

d.75 days

30. Ammonium acetate on heating decomposes to give

a.amine

b.acetylamine

c.acetamide

d.formamide

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

a.Acetone

b.Acetaldehyde

c.Benzaldehyde

d.Formaldehyde

32. Calcium formate of heating gives

a.methanoic anhydride

b.banzaldehyde

c.formaldehyde

d.formic acid

33. Bromination of isobutene gives as major product

a.isobutyl bromide

b.n-butyl bromide

c.None of the above

d.tert. butyl bromide

34. Acetic acid exists as dimer in benzene due to

a.presence of carbonyl group

b.presence of hydrogen atom at α-carbon

c.condensation reaction

d.hydrogen bonding

35. Acid present in the lemon is

a.lactic acid

b.citric acid

c.tartaric acid

d.acrylic acid

36. 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

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

a.46

b.15

c.86

d.35

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

a.goes on increasing

b.may increase or decrease

c.decreases

d.remains constant

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

a.none of these

b.sodium

c.hydroxide

d.chloride

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

a.1

b.0

c.4

d.2

41. Art of electroplating was enunciated by

a.Ampere

b.Kohlorausch

c.Brugantally

d.Einstein

42. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.18 days

b.2 days

c.6 days

d.3 days

43. 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.125 min

c.105 min

d.70 min

44. Equilibrium constant changes with

a.both temperature and concentration

b.time

c.temperature

d.pressure

45. Schiffs bax is obtaind by the action of

a.All the above

b.p-amines with acid anhydrides

c.p-amines with acid chloride

d.p-amines with aldehydes

46. All the radioactive changes are of

a.Zero order

b.Third order

c.Second order

d.First order

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

a.N energy level

b.M energy level

c.K energy level

d.L energy level

48. The chemical system in equilibrium is not affected by

a.change in the concentration of products

b.changing the temperature

c.addition of a catalyst

d.increase in the concentration of reactants

49. Williamsons synthesis is used for preparing

a.amines

b.ether

c.ester

d.alcohol

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

a.density decreases

b.m.pt. decreases

c.b.pt increases

d.f.pt. decreases

51. Vinegar contains

a.10 to 12% acetic acid

b.7 to 8% acetic acid

c.100% acetic acid

d.19% acetic acid

52. Propene on treatment with dil. sulphuric acid gives

a.A and B

b.None of above

c.1-propanol

d.2-propanol

53. In neopentane the number of primary carbon atoms are

a.2

b.4

c.1

d.5

54. Aniline condenses with benzaldehyde to give

a.benzoyl aniline

b.N benzal aniline

c.benzal aniline

d.N benzoyl aniline

55. An azeotrope is one that

a.can be separated by distillation at critical solution temperature

b.can be separated by distillation below critical solution temperature

c.can be separated by distillation above critical solution temperature

d.cannot be separated by distillation

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

a.96 degree

b.90 degree

c.180 degree

d.144 degree

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

a.ionic bond

b.Van der Waals interaction

c.hydrogen bond

d.polar covalent bond

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

a.half as radioactive as the radium content

b.no longer radioactive

c.as radioactive as the radium content

d.thrice as radioactive as the radium content

59. 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 higher by one unit

b.lower nuclear charge

c.nuclear charge lower by one unit

d.same nuclear charge

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

a.2 methyl propane

b.2 methanal

c.Methoxy ethane

d.1 propanal

61. Which of the following is absorbed by HCl?

a.Acetylene

b.Ethylene

c.Methyl alcohol

d.Ethanamine

62. Radio-activity was discovered by

a.Henry Becquerel

b.Madame Curie

c.Rutherford

d.J.J. Thomson

63. Which will have the maximum solubility in water?

a.Isobutyl alcohol

b.1 butanol

c.Methanol

d.Tert. butyl alcohol

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

a.alcohols have hydrogen bond

b.alcohols have ionic bond

c.alcohols are miscible with water

d.alcohols contains –OH group

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

a.p-block

b.Alkali earth metal

c.Alkaline earth metal

d.Transition elements

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

a.Benzene and toluene

b.Ethyl alcohol and cyclohexane

c.Acetone and ethyl alcohol

d.Acetone and chloroform

67. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.3.3

b.2

c.25

d.2.5

68. In the case of exothermic reactions equilibrium constant K

a.depends on the nature

b.increases with pressure

c.decreases with temperature

d.remains unchanged with temperature

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

a.3 amp current is passed

b.2 faraday electricity is passed

c.1 coulomb electricity is passed

d.1 amp. current for 1 hrs is passed

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

a.azo compound

b.diazo compound

c.benzene

d.nitro compound

71. Carbinol is

a.ethyl alcohol

b.2-propanol

c.1-butanol

d.methyl alcohol

72. In isopentane the number of secondary carbon atom is

a.1

b.2

c.0

d.3

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

a.inversely proportional to the conc.

b.independent of the conc.

c.directly proportional to the initial conc.

d.directly proportional to cube of the conc.

74. Nobels oil is

a.dinitro glycerine

b.glycerol trinitrate

c.glycerol

d.trinitroglycol

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

a.methyl methanoate

b.formic acid

c.ethyl acetate

d.propyl methanoate

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

a.Acetic acid

b.Citric acid

c.Butyric acid

d.Oxalic acid

77. Formic acid is prepared by distilling glycerol with

a.tartaric acid at 10 degree Centigrade

b.lactic acid at 50 degree Centigrade

c.oxalic acid at 240 degree Centigrade

d.oxalic acid at 110 degree Centigrade

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

a.Voltmeter

b.Ammeter

c.Thermometer

d.Calorimeter

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

a.3

b.5

c.7

d.6

80. Which of the following has minimum boiling point?

a.neopentane

b.both A and B

c.isopentane

d.n-pentane

81. Which of the following has dipole moment?

a.Both A and B

b.1-propene

c.cis-2-butene

d.trans-2-butene

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

a.Radium-silicon method

b.Carbon 14 dating method

c.Potassium-Argon method

d.Uranium lead method

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

a.36

b.5

c.27

d.9

84. Salt Bridge is used because it

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

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

c.provides the extra ions

d.maintains the electrical neutrality of the two half cells

85. Calcium acetate on heating gives

a.acetone

b.acetic anhydride

c.ethane

d.pentane

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

a.acetaldehyde

b.ethyne

c.ethane

d.methane

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

a.Isobaric

b.Isothermal

c.Adiabatic

d.none of the above

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

a.electron

b.meson

c.positron

d.neutron

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

a.6

b.16

c.5

d.24

90. RCOCl reacts with R MgBr to yield

a.ketone

b.secondary alcohol

c.primary alcohol

d.tertiary alcohol

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

a.increases only if the products are gaseous

b.increase considerably

c.is not affected

d.decreases

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

a.14 m

b.9.8 m

c.7.9 m

d.8.9 m

93. Schiffs base on reduction give

a.sec. amine

b.tert. amine

c.aniline

d.p-amine

94. A mole of electrons is the same as

a.one

b.ampere-second

c.curie

d.faraday

95. Heisenberg test can be used to distinguish between

a.primary amines and tertiary amines

b.primary amines, secondary amines and tertiary amine

c.primary amines and secondary amines

d.All the above

96. 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.2.2

b.0.09

c.1.1

d.0.9

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

a.2

b.9

c.15

d.3

98. 1 Joule is equal to

a.2.39 Cal

b.1.390 Cal

c.0.04184 Cal

d.0.239 Cal

99. Hydrogen bomb is based on the phenomenon of

a.Chemical reaction

b.Nuclear fusion

c.Nuclear fission

d.Nuclear explosion

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

a.Iodine

b.Phosphorus

c.Oxygen

d.Nitrogen

CUET 2026 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2026

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