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

a.1% aqueous solution of fructose

b.1% aqueous solution of sodium chloride

c.1% aqueous solution of urea

d.1% aqueous solution of methyl alcohol

2. Calcium acetate on heating gives

a.acetic anhydride

b.ethane

c.acetone

d.pentane

3. Formic acid is prepared by distilling glycerol with

a.lactic acid at 50 degree Centigrade

b.tartaric acid at 10 degree Centigrade

c.oxalic acid at 240 degree Centigrade

d.oxalic acid at 110 degree Centigrade

4. Which of the following has dipole moment?

a.1-propene

b.Both A and B

c.trans-2-butene

d.cis-2-butene

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

a.thrice as radioactive as the radium content

b.as radioactive as the radium content

c.half as radioactive as the radium content

d.no longer radioactive

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

a.1 amp. current for 1 hrs is passed

b.1 coulomb electricity is passed

c.2 faraday electricity is passed

d.3 amp current is passed

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

a.propyl methanoate

b.formic acid

c.methyl methanoate

d.ethyl acetate

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

a.144 degree

b.90 degree

c.96 degree

d.180 degree

9. Carbinol is

a.ethyl alcohol

b.1-butanol

c.2-propanol

d.methyl alcohol

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

a.Isothermal

b.none of the above

c.Adiabatic

d.Isobaric

11. In the case of o-chlorophenol there exist

a.intramolecular hydrogen bonding

b.no hydrogen bonding

c.both inter and intramolecular hydrogen bonding

d.intermolecular covalent bonding

12. The hydrogen halide which has maximum boiling point is

a.HBr

b.HCl

c.HF

d.HI

13. 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/gm

b.500 cal/mol

c.-44.2 Kcal/mol

d.-21.12 Kcal/mol

14. 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.0.09

c.1.1

d.2.2

15. Which of the following is a sedative?

a.Benzaldehyde

b.Paraformaldehyde

c.Metaldehyde

d.Paraldehyde

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

a.1-propanol

b.1-propene

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

d.2-propene

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

a.decreases

b.increases

c.is constant

d.is zero

18. 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 hydrogen bond

d.alcohols have ionic bond

19. Which will have the maximum solubility in water?

a.1 butanol

b.Methanol

c.Isobutyl alcohol

d.Tert. butyl alcohol

20. 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.224

c.142

d.728

21. Ammonium acetate on heating decomposes to give

a.acetamide

b.acetylamine

c.amine

d.formamide

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

a.All the above

b.electron repelling group

c.electron attracting group

d.free radical

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

a.125 min

b.105 min

c.50 min

d.70 min

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

a.inhibitor

b.induced catalyst

c.autocatalyst

d.promoter

25. Bromination of isobutene gives as major product

a.tert. butyl bromide

b.None of the above

c.isobutyl bromide

d.n-butyl bromide

26. Propene on treatment with dil. sulphuric acid gives

a.1-propanol

b.None of above

c.A and B

d.2-propanol

27. Nobels oil is

a.dinitro glycerine

b.trinitroglycol

c.glycerol

d.glycerol trinitrate

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

a.Ammeter

b.Calorimeter

c.Thermometer

d.Voltmeter

29. Which of the following is a carcinogen?

a.Benzenediazonium chloride

b.Aniline

c.Ethyl amine

d.N-nitroso amine

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

a.diphenyl methyl

b.All the above

c.triphenyl methyl

d.benzyl

31. Heisenberg test can be used to distinguish between

a.primary amines and secondary amines

b.primary amines, secondary amines and tertiary amine

c.primary amines and tertiary amines

d.All the above

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

a.decreases

b.increase considerably

c.increases only if the products are gaseous

d.is not affected

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

a.p-block

b.Alkaline earth metal

c.Alkali earth metal

d.Transition elements

34. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.3 days

b.18 days

c.2 days

d.6 days

35. Which of the following will have maximum entropy?

a.Helium

b.Argon

c.Silver

d.Diamond

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

a.1

b.2

c.4

d.0

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

a.hydroxide

b.chloride

c.none of these

d.sodium

38. 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.100 days

d.50 days

39. Art of electroplating was enunciated by

a.Ampere

b.Einstein

c.Brugantally

d.Kohlorausch

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

a.Van der Waals interaction

b.polar covalent bond

c.ionic bond

d.hydrogen bond

41. The bond angle in ammonia is

a.99 degree

b.110 degree

c.107 degree

d.106 degree

42. Acetic acid exists as dimer in benzene due to

a.condensation reaction

b.presence of hydrogen atom at α-carbon

c.presence of carbonyl group

d.hydrogen bonding

43. 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.nuclear charge higher by one unit

c.nuclear charge lower by one unit

d.lower nuclear charge

44. 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

45. Shape of the carboxyl group is

a.octahedral

b.pyramidal

c.tetrahedral

d.planar triangular

46. Amongst HX, the maximum dipole moment is of

a.HI

b.HCl

c.HBr

d.HF

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

a.5

b.6

c.16

d.24

48. A mole of electrons is the same as

a.faraday

b.one

c.curie

d.ampere-second

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

a.Butyric acid

b.Acetic acid

c.Citric acid

d.Oxalic acid

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

a.positron

b.meson

c.electron

d.neutron

51. Salt Bridge is used because it

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

b.maintains the electrical neutrality of the two half cells

c.provides the extra ions

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

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

a.7

b.5

c.3

d.6

53. Which of the following has minimum boiling point?

a.n-pentane

b.neopentane

c.both A and B

d.isopentane

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

a.Uranium lead method

b.Carbon 14 dating method

c.Potassium-Argon method

d.Radium-silicon method

55. Once the equilibrium is reached under given condition:

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

b.Conc. of products remains same

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

d.Conc. of reactants remains same

56. Aniline condenses with benzaldehyde to give

a.benzoyl aniline

b.N benzoyl aniline

c.N benzal aniline

d.benzal aniline

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

a.Oxygen

b.Nitrogen

c.Phosphorus

d.Iodine

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

a.changing the conc. of the electrolytes

b.providing higher potential from outside

c.reversing the electrodes

d.changing the electrolytes in two half cells

59. Schiffs bax is obtaind by the action of

a.p-amines with acid chloride

b.All the above

c.p-amines with acid anhydrides

d.p-amines with aldehydes

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

a.Benzaldehyde

b.Acetone

c.Formaldehyde

d.Acetaldehyde

61. All the radioactive changes are of

a.Zero order

b.Third order

c.First order

d.Second order

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

a.M energy level

b.L energy level

c.N energy level

d.K energy level

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

a.Acetone and ethyl alcohol

b.Ethyl alcohol and cyclohexane

c.Acetone and chloroform

d.Benzene and toluene

64. Calcium formate of heating gives

a.banzaldehyde

b.formaldehyde

c.formic acid

d.methanoic anhydride

65. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.2.5

b.25

c.3.3

d.2

66. Acid present in the lemon is

a.citric acid

b.tartaric acid

c.acrylic acid

d.lactic acid

67. Wurtz reaction cannot be used for the preparation of

a.alkanes containing odd no. of C-atoms

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

c.methane

d.alkanes containing even no. of C-atoms

68. 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

69. Which of the following is absorbed by HCl?

a.Ethanamine

b.Methyl alcohol

c.Acetylene

d.Ethylene

70. Vinegar contains

a.7 to 8% acetic acid

b.10 to 12% acetic acid

c.100% acetic acid

d.19% acetic acid

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

a.secondary amine

b.tert. amine

c.quaternary salt

d.p-amine

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

a.energy of activation decreases

b.activation energy increases

c.value of rate constant increases

d.number of collisions get doubled

73. Williamsons synthesis is used for preparing

a.ether

b.alcohol

c.amines

d.ester

74. Equivalent weight of ammonia is

a.2.7

b.31

c.17

d.14/3

75. An azeotrope is one that

a.can be separated by distillation below critical solution temperature

b.can be separated by distillation at critical solution temperature

c.can be separated by distillation above critical solution temperature

d.cannot be separated by distillation

76. 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

77. In isopentane the number of secondary carbon atom is

a.0

b.2

c.1

d.3

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

a.methane

b.ethyne

c.ethane

d.acetaldehyde

79. Mesitylene is

a.2, 2, 4 trimethyl benzene

b.1, 3, 5 trimethyl benzene

c.1, 3, 4 trimethyl benzene

d.2, 3, 5 trimethyl benzene

80. The chemical system in equilibrium is not affected by

a.increase in the concentration of reactants

b.changing the temperature

c.change in the concentration of products

d.addition of a catalyst

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

a.directly proportional to cube of the conc.

b.inversely proportional to the conc.

c.directly proportional to the initial conc.

d.independent of the conc.

82. In neopentane the number of primary carbon atoms are

a.1

b.4

c.5

d.2

83. Radio-activity was discovered by

a.Rutherford

b.J.J. Thomson

c.Henry Becquerel

d.Madame Curie

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

a.1 propanal

b.2 methanal

c.Methoxy ethane

d.2 methyl propane

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

a.15

b.2

c.9

d.3

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

a.diazo compound

b.azo compound

c.nitro compound

d.benzene

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

a.1 mole gm atom

b.5 gm mole

c.1 gm equivalent

d.3 mole

88. Equilibrium constant changes with

a.both temperature and concentration

b.pressure

c.temperature

d.time

89. RCOCl reacts with R MgBr to yield

a.secondary alcohol

b.tertiary alcohol

c.ketone

d.primary alcohol

90. Schiffs base on reduction give

a.sec. amine

b.tert. amine

c.p-amine

d.aniline

91. 1 Joule is equal to

a.2.39 Cal

b.1.390 Cal

c.0.04184 Cal

d.0.239 Cal

92. An electrophile is a/an

a.Lewis base

b.electron deficient species

c.Lewis acid

d.Both A and B

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

a.27

b.36

c.5

d.9

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

a.silver chloride is sparingly soluble in water

b.silver nitrate is insoluble in water

c.solubility of silver nitrate increases with sodium chloride

d.the reaction is instantaneous

95. 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

96. 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

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

a.remains constant

b.may increase or decrease

c.goes on increasing

d.decreases

98. Shape of amines is

a.pyramidal

b.tetrahedral

c.square planar

d.planar triangular

99. Hydrogen bomb is based on the phenomenon of

a.Nuclear fusion

b.Nuclear fission

c.Nuclear explosion

d.Chemical reaction

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

a.f.pt. decreases

b.density decreases

c.m.pt. decreases

d.b.pt increases

CUET 2026 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2026

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