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. Calcium acetate on heating gives

a.acetone

b.ethane

c.pentane

d.acetic anhydride

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

a.chloride

b.sodium

c.hydroxide

d.none of these

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

a.Methoxy ethane

b.2 methanal

c.2 methyl propane

d.1 propanal

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

a.1 coulomb electricity is passed

b.1 amp. current for 1 hrs is passed

c.3 amp current is passed

d.2 faraday electricity is passed

5. Which of the following has dipole moment?

a.cis-2-butene

b.1-propene

c.Both A and B

d.trans-2-butene

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

a.p-block

b.Alkaline earth metal

c.Alkali earth metal

d.Transition elements

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

a.1-propanol

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

c.1-propene

d.2-propene

8. 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.

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

a.3

b.9

c.2

d.15

10. Bromination of isobutene gives as major product

a.isobutyl bromide

b.None of the above

c.n-butyl bromide

d.tert. butyl bromide

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

a.7

b.5

c.6

d.3

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

a.ethyne

b.methane

c.acetaldehyde

d.ethane

13. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.2.5

b.2

c.25

d.3.3

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

a.is zero

b.increases

c.decreases

d.is constant

15. Acetic acid exists as dimer in benzene due to

a.hydrogen bonding

b.presence of carbonyl group

c.condensation reaction

d.presence of hydrogen atom at α-carbon

16. Wurtz reaction cannot be used for the preparation of

a.alkanes containing even no. of C-atoms

b.alkanes containing odd no. of C-atoms

c.methane

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

17. Art of electroplating was enunciated by

a.Ampere

b.Kohlorausch

c.Einstein

d.Brugantally

18. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.6 days

b.2 days

c.18 days

d.3 days

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

a.positron

b.electron

c.meson

d.neutron

20. The bond angle in ammonia is

a.106 degree

b.99 degree

c.107 degree

d.110 degree

21. 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

22. Propene on treatment with dil. sulphuric acid gives

a.1-propanol

b.2-propanol

c.None of above

d.A and B

23. Formic acid is prepared by distilling glycerol with

a.tartaric acid at 10 degree Centigrade

b.oxalic acid at 240 degree Centigrade

c.lactic acid at 50 degree Centigrade

d.oxalic acid at 110 degree Centigrade

24. 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

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

a.m.pt. decreases

b.f.pt. decreases

c.density decreases

d.b.pt increases

26. In neopentane the number of primary carbon atoms are

a.5

b.1

c.4

d.2

27. Williamsons synthesis is used for preparing

a.ester

b.ether

c.amines

d.alcohol

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

a.ionic bond

b.polar covalent bond

c.hydrogen bond

d.Van der Waals interaction

29. Heisenberg test can be used to distinguish between

a.All the above

b.primary amines, secondary amines and tertiary amine

c.primary amines and secondary amines

d.primary amines and tertiary amines

30. Ammonium acetate on heating decomposes to give

a.amine

b.acetamide

c.formamide

d.acetylamine

31. 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.0.09

b.2.2

c.1.1

d.0.9

32. Equivalent weight of ammonia is

a.17

b.31

c.2.7

d.14/3

33. In isopentane the number of secondary carbon atom is

a.2

b.0

c.1

d.3

34. RCOCl reacts with R MgBr to yield

a.ketone

b.primary alcohol

c.tertiary alcohol

d.secondary alcohol

35. An electrophile is a/an

a.Both A and B

b.Lewis acid

c.Lewis base

d.electron deficient species

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

a.ethyl acetate

b.propyl methanoate

c.formic acid

d.methyl methanoate

37. Which of the following has minimum boiling point?

a.n-pentane

b.isopentane

c.both A and B

d.neopentane

38. 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

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

a.6

b.16

c.24

d.5

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

a.1 mole gm atom

b.3 mole

c.5 gm mole

d.1 gm equivalent

41. 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.500 cal/gm

c.-21.12 Kcal/mol

d.-44.2 Kcal/mol

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

a.Nitrogen

b.Phosphorus

c.Iodine

d.Oxygen

43. Radio-activity was discovered by

a.Rutherford

b.J.J. Thomson

c.Henry Becquerel

d.Madame Curie

44. 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.50 days

c.25 days

d.100 days

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

a.2

b.1

c.0

d.4

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

a.36

b.9

c.5

d.27

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

a.increase considerably

b.increases only if the products are gaseous

c.decreases

d.is not affected

48. Nobels oil is

a.glycerol trinitrate

b.trinitroglycol

c.dinitro glycerine

d.glycerol

49. Once the equilibrium is reached under given condition:

a.Conc. of reactants remains same

b.Conc. of products remains same

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

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

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

a.Isothermal

b.Isobaric

c.none of the above

d.Adiabatic

51. Which of the following is a sedative?

a.Benzaldehyde

b.Metaldehyde

c.Paraformaldehyde

d.Paraldehyde

52. Schiffs bax is obtaind by the action of

a.p-amines with acid chloride

b.All the above

c.p-amines with aldehydes

d.p-amines with acid anhydrides

53. 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

54. 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.50 min

c.70 min

d.125 min

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

a.benzene

b.diazo compound

c.nitro compound

d.azo compound

56. 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.224

c.448

d.142

57. Carbinol is

a.2-propanol

b.ethyl alcohol

c.methyl alcohol

d.1-butanol

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

a.Ammeter

b.Calorimeter

c.Thermometer

d.Voltmeter

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

a.autocatalyst

b.promoter

c.induced catalyst

d.inhibitor

60. 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.some are coloured

d.all the above

61. 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.as radioactive as the radium content

d.no longer radioactive

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

a.Citric acid

b.Oxalic acid

c.Acetic acid

d.Butyric acid

63. Hydrogen bomb is based on the phenomenon of

a.Nuclear explosion

b.Nuclear fusion

c.Chemical reaction

d.Nuclear fission

64. Which of the following will have maximum entropy?

a.Silver

b.Argon

c.Helium

d.Diamond

65. Vinegar contains

a.19% acetic acid

b.10 to 12% acetic acid

c.7 to 8% acetic acid

d.100% acetic acid

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

a.free radical

b.electron repelling group

c.All the above

d.electron attracting group

67. In the case of o-chlorophenol there exist

a.both inter and intramolecular hydrogen bonding

b.intermolecular covalent bonding

c.no hydrogen bonding

d.intramolecular hydrogen bonding

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

a.86

b.15

c.46

d.35

69. Which of the following is a carcinogen?

a.N-nitroso amine

b.Benzenediazonium chloride

c.Aniline

d.Ethyl amine

70. 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

71. Which of the following is absorbed by HCl?

a.Ethanamine

b.Ethylene

c.Methyl alcohol

d.Acetylene

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

a.may increase or decrease

b.decreases

c.goes on increasing

d.remains constant

73. The chemical system in equilibrium is not affected by

a.increase in the concentration of reactants

b.change in the concentration of products

c.addition of a catalyst

d.changing the temperature

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

a.All the above

b.benzyl

c.triphenyl methyl

d.diphenyl methyl

75. All the radioactive changes are of

a.First order

b.Second order

c.Third order

d.Zero order

76. 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

77. Amongst HX, the maximum dipole moment is of

a.HCl

b.HI

c.HF

d.HBr

78. Schiffs base on reduction give

a.p-amine

b.sec. amine

c.tert. amine

d.aniline

79. Equilibrium constant changes with

a.both temperature and concentration

b.time

c.temperature

d.pressure

80. 1 Joule is equal to

a.1.390 Cal

b.0.239 Cal

c.2.39 Cal

d.0.04184 Cal

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

a.Ethyl alcohol and cyclohexane

b.Benzene and toluene

c.Acetone and chloroform

d.Acetone and ethyl alcohol

82. A mole of electrons is the same as

a.ampere-second

b.one

c.faraday

d.curie

83. Which will have the maximum solubility in water?

a.Isobutyl alcohol

b.Tert. butyl alcohol

c.1 butanol

d.Methanol

84. Salt Bridge is used because it

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

b.provides the extra ions

c.maintains the electrical neutrality of the two half cells

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

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

a.Potassium-Argon method

b.Radium-silicon method

c.Carbon 14 dating method

d.Uranium lead method

86. An azeotrope is one that

a.can be separated by distillation above critical solution temperature

b.cannot be separated by distillation

c.can be separated by distillation at critical solution temperature

d.can be separated by distillation below critical solution temperature

87. 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.14 m

c.9.8 m

d.7.9 m

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

a.alcohols have hydrogen bond

b.alcohols are miscible with water

c.alcohols have ionic bond

d.alcohols contains –OH group

89. Mesitylene is

a.2, 2, 4 trimethyl benzene

b.1, 3, 4 trimethyl benzene

c.2, 3, 5 trimethyl benzene

d.1, 3, 5 trimethyl benzene

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

a.90 degree

b.180 degree

c.144 degree

d.96 degree

91. Shape of the carboxyl group is

a.planar triangular

b.octahedral

c.pyramidal

d.tetrahedral

92. 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

93. Shape of amines is

a.square planar

b.pyramidal

c.tetrahedral

d.planar triangular

94. Acid present in the lemon is

a.citric acid

b.tartaric acid

c.lactic acid

d.acrylic acid

95. The maximum number of molecules are in:

a.36 gram of water

b.48 gram of ethyl alcohol

c.52 gram of nitrogen peroxide

d.14 gram of carbon dioxide

96. Aniline condenses with benzaldehyde to give

a.benzal aniline

b.benzoyl aniline

c.N benzal aniline

d.N benzoyl aniline

97. The hydrogen halide which has maximum boiling point is

a.HI

b.HF

c.HBr

d.HCl

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

a.Acetone

b.Acetaldehyde

c.Benzaldehyde

d.Formaldehyde

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

a.N energy level

b.K energy level

c.L energy level

d.M energy level

100. Calcium formate of heating gives

a.formaldehyde

b.banzaldehyde

c.formic acid

d.methanoic anhydride

CUET 2025 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2025

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