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. Calcium formate of heating gives

a.methanoic anhydride

b.formaldehyde

c.formic acid

d.banzaldehyde

2. All the radioactive changes are of

a.Second order

b.Zero order

c.Third order

d.First order

3. 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

4. Which of the following is a carcinogen?

a.Aniline

b.Ethyl amine

c.Benzenediazonium chloride

d.N-nitroso amine

5. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.6 days

b.18 days

c.3 days

d.2 days

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

a.electron

b.meson

c.neutron

d.positron

7. 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

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

a.6

b.7

c.5

d.3

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

a.inhibitor

b.autocatalyst

c.promoter

d.induced catalyst

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

a.Butyric acid

b.Oxalic acid

c.Citric acid

d.Acetic acid

11. Which of the following has dipole moment?

a.1-propene

b.Both A and B

c.cis-2-butene

d.trans-2-butene

12. 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

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

a.1% aqueous solution of sodium chloride

b.1% aqueous solution of methyl alcohol

c.1% aqueous solution of fructose

d.1% aqueous solution of urea

14. Salt Bridge is used because it

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

b.provides the extra ions

c.maintains the electrical neutrality of the two half cells

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

15. 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.-44.2 Kcal/mol

c.-21.12 Kcal/mol

d.500 cal/gm

16. Art of electroplating was enunciated by

a.Kohlorausch

b.Einstein

c.Brugantally

d.Ampere

17. 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.728

b.142

c.448

d.224

18. Shape of the carboxyl group is

a.octahedral

b.pyramidal

c.tetrahedral

d.planar triangular

19. 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.75 days

b.25 days

c.50 days

d.100 days

20. Heisenberg test can be used to distinguish between

a.primary amines, secondary amines and tertiary amine

b.primary amines and tertiary amines

c.primary amines and secondary amines

d.All the above

21. The chemical system in equilibrium is not affected by

a.increase in the concentration of reactants

b.change in the concentration of products

c.changing the temperature

d.addition of a catalyst

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

a.7.9 m

b.9.8 m

c.14 m

d.8.9 m

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

a.methyl methanoate

b.ethyl acetate

c.formic acid

d.propyl methanoate

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

a.16

b.24

c.5

d.6

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

a.Oxygen

b.Nitrogen

c.Phosphorus

d.Iodine

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

a.is zero

b.increases

c.is constant

d.decreases

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

a.none of these

b.chloride

c.hydroxide

d.sodium

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

a.Adiabatic

b.none of the above

c.Isobaric

d.Isothermal

29. Which of the following has minimum boiling point?

a.n-pentane

b.isopentane

c.neopentane

d.both A and B

30. Shape of amines is

a.planar triangular

b.tetrahedral

c.square planar

d.pyramidal

31. Vinegar contains

a.100% acetic acid

b.10 to 12% acetic acid

c.7 to 8% acetic acid

d.19% acetic acid

32. A mole of electrons is the same as

a.one

b.curie

c.ampere-second

d.faraday

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

a.1 gm equivalent

b.3 mole

c.5 gm mole

d.1 mole gm atom

34. Mesitylene is

a.2, 2, 4 trimethyl benzene

b.1, 3, 4 trimethyl benzene

c.1, 3, 5 trimethyl benzene

d.2, 3, 5 trimethyl benzene

35. Aniline condenses with benzaldehyde to give

a.N benzal aniline

b.benzal aniline

c.benzoyl aniline

d.N benzoyl aniline

36. Equilibrium constant changes with

a.temperature

b.pressure

c.both temperature and concentration

d.time

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

a.density decreases

b.m.pt. decreases

c.f.pt. decreases

d.b.pt increases

38. Williamsons synthesis is used for preparing

a.ether

b.alcohol

c.amines

d.ester

39. In isopentane the number of secondary carbon atom is

a.2

b.0

c.1

d.3

40. Schiffs bax is obtaind by the action of

a.All the above

b.p-amines with aldehydes

c.p-amines with acid anhydrides

d.p-amines with acid chloride

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

a.same nuclear charge

b.lower nuclear charge

c.nuclear charge lower by one unit

d.nuclear charge higher by one unit

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

a.1 coulomb electricity is passed

b.2 faraday electricity is passed

c.1 amp. current for 1 hrs is passed

d.3 amp current is passed

43. 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

44. RCOCl reacts with R MgBr to yield

a.primary alcohol

b.secondary alcohol

c.ketone

d.tertiary alcohol

45. 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

46. Nobels oil is

a.glycerol

b.dinitro glycerine

c.trinitroglycol

d.glycerol trinitrate

47. In neopentane the number of primary carbon atoms are

a.5

b.2

c.1

d.4

48. Acetic acid exists as dimer in benzene due to

a.condensation reaction

b.hydrogen bonding

c.presence of carbonyl group

d.presence of hydrogen atom at α-carbon

49. Propene on treatment with dil. sulphuric acid gives

a.A and B

b.1-propanol

c.2-propanol

d.None of above

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

a.Methoxy ethane

b.1 propanal

c.2 methyl propane

d.2 methanal

51. Which will have the maximum solubility in water?

a.1 butanol

b.Isobutyl alcohol

c.Tert. butyl alcohol

d.Methanol

52. Hydrogen bomb is based on the phenomenon of

a.Nuclear fission

b.Nuclear explosion

c.Chemical reaction

d.Nuclear fusion

53. Radio-activity was discovered by

a.Henry Becquerel

b.Madame Curie

c.Rutherford

d.J.J. Thomson

54. The hydrogen halide which has maximum boiling point is

a.HCl

b.HBr

c.HF

d.HI

55. An electrophile is a/an

a.electron deficient species

b.Lewis base

c.Lewis acid

d.Both A and B

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

a.96 degree

b.90 degree

c.180 degree

d.144 degree

57. Equivalent weight of ammonia is

a.14/3

b.2.7

c.17

d.31

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

a.Formaldehyde

b.Acetone

c.Benzaldehyde

d.Acetaldehyde

59. An azeotrope is one that

a.cannot be separated by distillation

b.can be separated by distillation above critical solution temperature

c.can be separated by distillation at critical solution temperature

d.can be separated by distillation below critical solution temperature

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

a.alcohols contains –OH group

b.alcohols are miscible with water

c.alcohols have ionic bond

d.alcohols have hydrogen bond

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

a.Alkali earth metal

b.p-block

c.Alkaline earth metal

d.Transition elements

62. In the case of o-chlorophenol there exist

a.intermolecular covalent bonding

b.intramolecular hydrogen bonding

c.both inter and intramolecular hydrogen bonding

d.no hydrogen bonding

63. 1 Joule is equal to

a.0.04184 Cal

b.1.390 Cal

c.0.239 Cal

d.2.39 Cal

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

a.directly proportional to the initial conc.

b.directly proportional to cube of the conc.

c.inversely proportional to the conc.

d.independent of the conc.

65. Amongst HX, the maximum dipole moment is of

a.HCl

b.HF

c.HBr

d.HI

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

a.free radical

b.All the above

c.electron attracting group

d.electron repelling group

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

a.9

b.5

c.27

d.36

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

a.number of collisions get doubled

b.energy of activation decreases

c.activation energy increases

d.value of rate constant increases

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

a.15

b.86

c.35

d.46

70. Bromination of isobutene gives as major product

a.None of the above

b.tert. butyl bromide

c.isobutyl bromide

d.n-butyl bromide

71. Schiffs base on reduction give

a.tert. amine

b.p-amine

c.aniline

d.sec. amine

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

a.Benzene and toluene

b.Acetone and chloroform

c.Acetone and ethyl alcohol

d.Ethyl alcohol and cyclohexane

73. 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 coloured

c.some are solid at room temperature

d.all the above

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

a.K energy level

b.M energy level

c.N energy level

d.L energy level

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

a.105 min

b.125 min

c.70 min

d.50 min

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

a.acetaldehyde

b.methane

c.ethyne

d.ethane

77. Formic acid is prepared by distilling glycerol with

a.lactic acid at 50 degree Centigrade

b.oxalic acid at 110 degree Centigrade

c.oxalic acid at 240 degree Centigrade

d.tartaric acid at 10 degree Centigrade

78. Ammonium acetate on heating decomposes to give

a.amine

b.acetamide

c.acetylamine

d.formamide

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

a.triphenyl methyl

b.diphenyl methyl

c.benzyl

d.All the above

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

a.providing higher potential from outside

b.changing the electrolytes in two half cells

c.changing the conc. of the electrolytes

d.reversing the electrodes

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

a.as radioactive as the radium content

b.thrice as radioactive as the radium content

c.no longer radioactive

d.half as radioactive as the radium content

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

a.3

b.15

c.9

d.2

83. Acid present in the lemon is

a.lactic acid

b.tartaric acid

c.acrylic acid

d.citric acid

84. In the case of exothermic reactions equilibrium constant K

a.decreases with temperature

b.depends on the nature

c.remains unchanged with temperature

d.increases with pressure

85. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.3.3

b.25

c.2

d.2.5

86. 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

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

a.silver nitrate is insoluble in water

b.the reaction is instantaneous

c.silver chloride is sparingly soluble in water

d.solubility of silver nitrate increases with sodium chloride

88. Which of the following is a sedative?

a.Paraformaldehyde

b.Paraldehyde

c.Benzaldehyde

d.Metaldehyde

89. Calcium acetate on heating gives

a.acetic anhydride

b.pentane

c.ethane

d.acetone

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

a.quaternary salt

b.p-amine

c.secondary amine

d.tert. amine

91. The bond angle in ammonia is

a.110 degree

b.107 degree

c.106 degree

d.99 degree

92. Which of the following will have maximum entropy?

a.Argon

b.Silver

c.Diamond

d.Helium

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

a.Uranium lead method

b.Radium-silicon method

c.Carbon 14 dating method

d.Potassium-Argon method

94. Carbinol is

a.1-butanol

b.ethyl alcohol

c.2-propanol

d.methyl alcohol

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

a.decreases

b.may increase or decrease

c.goes on increasing

d.remains constant

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

a.2

b.1

c.0

d.4

97. Wurtz reaction cannot be used for the preparation of

a.alkanes containing even no. of C-atoms

b.methane

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

d.alkanes containing odd no. of C-atoms

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

a.diazo compound

b.benzene

c.nitro compound

d.azo compound

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

a.Voltmeter

b.Thermometer

c.Calorimeter

d.Ammeter

100. Which of the following is absorbed by HCl?

a.Acetylene

b.Ethanamine

c.Methyl alcohol

d.Ethylene

CUET 2026 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2026

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