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. Nobels oil is

a.trinitroglycol

b.glycerol

c.dinitro glycerine

d.glycerol trinitrate

2. In the case of o-chlorophenol there exist

a.intermolecular covalent bonding

b.intramolecular hydrogen bonding

c.no hydrogen bonding

d.both inter and intramolecular hydrogen bonding

3. 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

4. Mesitylene is

a.2, 3, 5 trimethyl benzene

b.2, 2, 4 trimethyl benzene

c.1, 3, 5 trimethyl benzene

d.1, 3, 4 trimethyl benzene

5. 1 Joule is equal to

a.2.39 Cal

b.1.390 Cal

c.0.239 Cal

d.0.04184 Cal

6. Salt Bridge is used because it

a.provides the extra ions

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

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

d.maintains the electrical neutrality of the two half cells

7. Equivalent weight of ammonia is

a.17

b.14/3

c.2.7

d.31

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

a.energy of activation differs from one reaction to another

b.some are solid at room temperature

c.all the above

d.some are coloured

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

a.2

b.0

c.1

d.4

10. RCOCl reacts with R MgBr to yield

a.primary alcohol

b.secondary alcohol

c.tertiary alcohol

d.ketone

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

a.polar covalent bond

b.hydrogen bond

c.ionic bond

d.Van der Waals interaction

12. The maximum number of molecules are in:

a.52 gram of nitrogen peroxide

b.14 gram of carbon dioxide

c.36 gram of water

d.48 gram of ethyl alcohol

13. In isopentane the number of secondary carbon atom is

a.2

b.1

c.0

d.3

14. A mole of electrons is the same as

a.faraday

b.one

c.ampere-second

d.curie

15. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.25

b.2

c.2.5

d.3.3

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

a.1 amp. current for 1 hrs is passed

b.2 faraday electricity is passed

c.3 amp current is passed

d.1 coulomb electricity is passed

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

a.formic acid

b.ethyl acetate

c.methyl methanoate

d.propyl methanoate

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

a.reversing the electrodes

b.changing the conc. of the electrolytes

c.changing the electrolytes in two half cells

d.providing higher potential from outside

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

a.directly proportional to the initial conc.

b.inversely proportional to the conc.

c.directly proportional to cube of the conc.

d.independent of the conc.

20. Equilibrium constant changes with

a.both temperature and concentration

b.pressure

c.temperature

d.time

21. 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.70 min

d.105 min

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

a.thrice as radioactive as the radium content

b.half as radioactive as the radium content

c.no longer radioactive

d.as radioactive as the radium content

23. Calcium formate of heating gives

a.banzaldehyde

b.formic acid

c.methanoic anhydride

d.formaldehyde

24. Ammonium acetate on heating decomposes to give

a.acetamide

b.acetylamine

c.formamide

d.amine

25. Formic acid is prepared by distilling glycerol with

a.oxalic acid at 240 degree Centigrade

b.lactic acid at 50 degree Centigrade

c.tartaric acid at 10 degree Centigrade

d.oxalic acid at 110 degree Centigrade

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

a.144 degree

b.180 degree

c.90 degree

d.96 degree

27. Acid present in the lemon is

a.acrylic acid

b.tartaric acid

c.citric acid

d.lactic acid

28. 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.-44.2 Kcal/mol

d.500 cal/gm

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

a.density decreases

b.m.pt. decreases

c.f.pt. decreases

d.b.pt increases

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

a.diphenyl methyl

b.All the above

c.benzyl

d.triphenyl methyl

31. 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.same nuclear charge

c.lower nuclear charge

d.nuclear charge lower by one unit

32. Williamsons synthesis is used for preparing

a.alcohol

b.amines

c.ester

d.ether

33. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.18 days

b.2 days

c.3 days

d.6 days

34. Art of electroplating was enunciated by

a.Brugantally

b.Ampere

c.Einstein

d.Kohlorausch

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

a.1% aqueous solution of methyl alcohol

b.1% aqueous solution of fructose

c.1% aqueous solution of sodium chloride

d.1% aqueous solution of urea

36. Which of the following will have maximum entropy?

a.Argon

b.Silver

c.Diamond

d.Helium

37. Which of the following has minimum boiling point?

a.n-pentane

b.both A and B

c.neopentane

d.isopentane

38. In the case of exothermic reactions equilibrium constant K

a.decreases with temperature

b.increases with pressure

c.remains unchanged with temperature

d.depends on the nature

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

a.meson

b.electron

c.positron

d.neutron

40. The hydrogen halide which has maximum boiling point is

a.HF

b.HBr

c.HI

d.HCl

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

a.nitro compound

b.azo compound

c.diazo compound

d.benzene

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

a.Carbon 14 dating method

b.Uranium lead method

c.Potassium-Argon method

d.Radium-silicon method

43. Amongst HX, the maximum dipole moment is of

a.HI

b.HBr

c.HF

d.HCl

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

a.Acetone

b.Formaldehyde

c.Benzaldehyde

d.Acetaldehyde

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

a.increases

b.is zero

c.decreases

d.is constant

46. Once the equilibrium is reached under given condition:

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

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

c.Conc. of products remains same

d.Conc. of reactants remains same

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

a.1-propene

b.1-propanol

c.2-propene

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

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

a.16

b.24

c.5

d.6

49. All the radioactive changes are of

a.Second order

b.Zero order

c.First order

d.Third order

50. Schiffs base on reduction give

a.p-amine

b.aniline

c.tert. amine

d.sec. amine

51. Heisenberg test can be used to distinguish between

a.primary amines and tertiary amines

b.All the above

c.primary amines and secondary amines

d.primary amines, secondary amines and tertiary amine

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

a.2

b.15

c.3

d.9

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

a.3 mole

b.1 mole gm atom

c.5 gm mole

d.1 gm equivalent

54. Which of the following is a sedative?

a.Benzaldehyde

b.Paraformaldehyde

c.Paraldehyde

d.Metaldehyde

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

d.methane

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

a.chloride

b.sodium

c.none of these

d.hydroxide

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

a.All the above

b.free radical

c.electron attracting group

d.electron repelling group

58. Vinegar contains

a.100% acetic acid

b.10 to 12% acetic acid

c.19% acetic acid

d.7 to 8% acetic acid

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

a.7

b.5

c.3

d.6

60. Shape of the carboxyl group is

a.octahedral

b.pyramidal

c.planar triangular

d.tetrahedral

61. 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.25 days

b.100 days

c.50 days

d.75 days

62. Radio-activity was discovered by

a.Madame Curie

b.J.J. Thomson

c.Henry Becquerel

d.Rutherford

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

a.Iodine

b.Nitrogen

c.Oxygen

d.Phosphorus

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

a.46

b.35

c.86

d.15

65. Schiffs bax is obtaind by the action of

a.p-amines with aldehydes

b.p-amines with acid chloride

c.All the above

d.p-amines with acid anhydrides

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

a.value of rate constant increases

b.number of collisions get doubled

c.activation energy increases

d.energy of activation decreases

67. Carbinol is

a.ethyl alcohol

b.2-propanol

c.1-butanol

d.methyl alcohol

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

a.27

b.9

c.5

d.36

69. 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

70. An azeotrope is one that

a.can be separated by distillation below critical solution temperature

b.cannot be separated by distillation

c.can be separated by distillation above critical solution temperature

d.can be separated by distillation at critical solution temperature

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

a.promoter

b.autocatalyst

c.inhibitor

d.induced catalyst

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

a.Acetone and chloroform

b.Ethyl alcohol and cyclohexane

c.Benzene and toluene

d.Acetone and ethyl alcohol

73. Propene on treatment with dil. sulphuric acid gives

a.None of above

b.1-propanol

c.A and B

d.2-propanol

74. Acetic acid exists as dimer in benzene due to

a.presence of carbonyl group

b.condensation reaction

c.hydrogen bonding

d.presence of hydrogen atom at α-carbon

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

a.L energy level

b.M energy level

c.K energy level

d.N energy level

76. An electrophile is a/an

a.Both A and B

b.Lewis acid

c.Lewis base

d.electron deficient species

77. Calcium acetate on heating gives

a.acetone

b.acetic anhydride

c.ethane

d.pentane

78. Which will have the maximum solubility in water?

a.Tert. butyl alcohol

b.Isobutyl alcohol

c.Methanol

d.1 butanol

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

a.Thermometer

b.Ammeter

c.Voltmeter

d.Calorimeter

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

a.Butyric acid

b.Citric acid

c.Acetic acid

d.Oxalic acid

81. Shape of amines is

a.planar triangular

b.pyramidal

c.tetrahedral

d.square planar

82. Bromination of isobutene gives as major product

a.n-butyl bromide

b.None of the above

c.isobutyl bromide

d.tert. butyl bromide

83. The chemical system in equilibrium is not affected by

a.addition of a catalyst

b.increase in the concentration of reactants

c.changing the temperature

d.change in the concentration of products

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

a.Alkaline earth metal

b.Alkali earth metal

c.p-block

d.Transition elements

85. In neopentane the number of primary carbon atoms are

a.4

b.5

c.1

d.2

86. Which of the following has dipole moment?

a.cis-2-butene

b.1-propene

c.trans-2-butene

d.Both A and B

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

a.decreases

b.increases only if the products are gaseous

c.increase considerably

d.is not affected

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

a.Methoxy ethane

b.2 methanal

c.2 methyl propane

d.1 propanal

89. Which of the following is a carcinogen?

a.Aniline

b.Ethyl amine

c.N-nitroso amine

d.Benzenediazonium chloride

90. Hydrogen bomb is based on the phenomenon of

a.Chemical reaction

b.Nuclear explosion

c.Nuclear fission

d.Nuclear fusion

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

a.ethyne

b.ethane

c.methane

d.acetaldehyde

92. The bond angle in ammonia is

a.106 degree

b.110 degree

c.99 degree

d.107 degree

93. Aniline condenses with benzaldehyde to give

a.benzal aniline

b.benzoyl aniline

c.N benzal aniline

d.N benzoyl aniline

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

a.Adiabatic

b.Isobaric

c.Isothermal

d.none of the above

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

a.secondary amine

b.p-amine

c.tert. amine

d.quaternary salt

96. Which of the following is absorbed by HCl?

a.Ethanamine

b.Ethylene

c.Acetylene

d.Methyl alcohol

97. 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.1.1

b.0.09

c.0.9

d.2.2

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

a.silver nitrate is insoluble in water

b.silver chloride is sparingly soluble in water

c.solubility of silver nitrate increases with sodium chloride

d.the reaction is instantaneous

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

a.remains constant

b.decreases

c.may increase or decrease

d.goes on increasing

100. 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

CUET 2026 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2026

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