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.

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

a.lower nuclear charge

b.same nuclear charge

c.nuclear charge lower by one unit

d.nuclear charge higher by one unit

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

a.9

b.27

c.36

d.5

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

a.density decreases

b.b.pt increases

c.m.pt. decreases

d.f.pt. decreases

4. Which of the following will have maximum entropy?

a.Helium

b.Silver

c.Diamond

d.Argon

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. 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

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

a.directly proportional to cube of the conc.

b.inversely proportional to the conc.

c.independent of the conc.

d.directly proportional to the initial conc.

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

a.increases

b.is constant

c.is zero

d.decreases

9. An electrophile is a/an

a.Lewis acid

b.Lewis base

c.electron deficient species

d.Both A and B

10. Calcium formate of heating gives

a.banzaldehyde

b.formaldehyde

c.formic acid

d.methanoic anhydride

11. Acid present in the lemon is

a.citric acid

b.acrylic acid

c.tartaric acid

d.lactic acid

12. Which of the following has minimum boiling point?

a.both A and B

b.isopentane

c.n-pentane

d.neopentane

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

a.Uranium lead method

b.Radium-silicon method

c.Potassium-Argon method

d.Carbon 14 dating method

14. Equilibrium constant changes with

a.pressure

b.temperature

c.both temperature and concentration

d.time

15. 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 contains –OH group

d.alcohols are miscible with water

16. In isopentane the number of secondary carbon atom is

a.3

b.2

c.0

d.1

17. Propene on treatment with dil. sulphuric acid gives

a.1-propanol

b.2-propanol

c.A and B

d.None of above

18. Bromination of isobutene gives as major product

a.None of the above

b.n-butyl bromide

c.isobutyl bromide

d.tert. butyl bromide

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

a.none of these

b.hydroxide

c.sodium

d.chloride

20. 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

21. Calcium acetate on heating gives

a.ethane

b.acetone

c.acetic anhydride

d.pentane

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

a.diazo compound

b.benzene

c.azo compound

d.nitro compound

23. 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.2-propene

d.1-propene

24. In the case of o-chlorophenol there exist

a.intermolecular covalent bonding

b.both inter and intramolecular hydrogen bonding

c.intramolecular hydrogen bonding

d.no hydrogen bonding

25. Williamsons synthesis is used for preparing

a.alcohol

b.amines

c.ester

d.ether

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

a.p-block

b.Alkaline earth metal

c.Alkali earth metal

d.Transition elements

27. 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

28. Hydrogen bomb is based on the phenomenon of

a.Nuclear explosion

b.Chemical reaction

c.Nuclear fission

d.Nuclear fusion

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

a.96 degree

b.180 degree

c.90 degree

d.144 degree

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

a.Butyric acid

b.Citric acid

c.Acetic acid

d.Oxalic acid

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

a.Van der Waals interaction

b.ionic bond

c.hydrogen bond

d.polar covalent bond

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

a.1% aqueous solution of methyl alcohol

b.1% aqueous solution of urea

c.1% aqueous solution of sodium chloride

d.1% aqueous solution of fructose

33. 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

34. 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

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

a.1 amp. current for 1 hrs is passed

b.3 amp current is passed

c.1 coulomb electricity is passed

d.2 faraday electricity is passed

36. Schiffs base on reduction give

a.aniline

b.p-amine

c.tert. amine

d.sec. amine

37. Art of electroplating was enunciated by

a.Kohlorausch

b.Ampere

c.Einstein

d.Brugantally

38. 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.-44.2 Kcal/mol

c.500 cal/mol

d.-21.12 Kcal/mol

39. The maximum number of molecules are in:

a.48 gram of ethyl alcohol

b.14 gram of carbon dioxide

c.52 gram of nitrogen peroxide

d.36 gram of water

40. Nobels oil is

a.trinitroglycol

b.glycerol

c.dinitro glycerine

d.glycerol trinitrate

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

a.energy of activation decreases

b.activation energy increases

c.number of collisions get doubled

d.value of rate constant increases

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

a.silver chloride is sparingly soluble in water

b.solubility of silver nitrate increases with sodium chloride

c.the reaction is instantaneous

d.silver nitrate is insoluble in water

43. Shape of the carboxyl group is

a.octahedral

b.tetrahedral

c.planar triangular

d.pyramidal

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

a.5

b.6

c.7

d.3

45. Vinegar contains

a.19% acetic acid

b.7 to 8% acetic acid

c.10 to 12% acetic acid

d.100% acetic acid

46. Ammonium acetate on heating decomposes to give

a.amine

b.formamide

c.acetamide

d.acetylamine

47. Which of the following is a sedative?

a.Metaldehyde

b.Benzaldehyde

c.Paraformaldehyde

d.Paraldehyde

48. Amongst HX, the maximum dipole moment is of

a.HI

b.HBr

c.HCl

d.HF

49. Equivalent weight of ammonia is

a.17

b.31

c.2.7

d.14/3

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

a.86

b.35

c.46

d.15

51. 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

52. All the radioactive changes are of

a.Third order

b.First order

c.Second order

d.Zero order

53. 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.25 days

c.100 days

d.75 days

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

a.1 propanal

b.2 methanal

c.2 methyl propane

d.Methoxy ethane

55. Formic acid is prepared by distilling glycerol with

a.lactic acid at 50 degree Centigrade

b.oxalic acid at 240 degree Centigrade

c.oxalic acid at 110 degree Centigrade

d.tartaric acid at 10 degree Centigrade

56. Shape of amines is

a.pyramidal

b.tetrahedral

c.square planar

d.planar triangular

57. Which of the following has dipole moment?

a.cis-2-butene

b.Both A and B

c.trans-2-butene

d.1-propene

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

a.Acetaldehyde

b.Acetone

c.Benzaldehyde

d.Formaldehyde

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

a.15

b.3

c.2

d.9

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

a.Thermometer

b.Ammeter

c.Voltmeter

d.Calorimeter

62. Which of the following is absorbed by HCl?

a.Acetylene

b.Ethylene

c.Ethanamine

d.Methyl alcohol

63. Schiffs bax is obtaind by the action of

a.p-amines with aldehydes

b.p-amines with acid chloride

c.p-amines with acid anhydrides

d.All the above

64. Once the equilibrium is reached under given condition:

a.Conc. of products remains same

b.Conc. of reactants remains same

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

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

65. 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

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

a.no longer radioactive

b.half as radioactive as the radium content

c.thrice as radioactive as the radium content

d.as radioactive as the radium content

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

a.All the above

b.triphenyl methyl

c.benzyl

d.diphenyl methyl

68. Mesitylene is

a.1, 3, 4 trimethyl benzene

b.2, 3, 5 trimethyl benzene

c.2, 2, 4 trimethyl benzene

d.1, 3, 5 trimethyl benzene

69. Salt Bridge is used because it

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

b.maintains the electrical neutrality of the two half cells

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

d.provides the extra ions

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

a.decreases

b.is not affected

c.increases only if the products are gaseous

d.increase considerably

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

a.24

b.6

c.5

d.16

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

a.Nitrogen

b.Phosphorus

c.Iodine

d.Oxygen

73. 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

74. Radio-activity was discovered by

a.Rutherford

b.Henry Becquerel

c.J.J. Thomson

d.Madame Curie

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

a.ethyne

b.ethane

c.acetaldehyde

d.methane

76. 1 Joule is equal to

a.1.390 Cal

b.0.239 Cal

c.2.39 Cal

d.0.04184 Cal

77. 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.3 mole

d.1 gm equivalent

78. Aniline condenses with benzaldehyde to give

a.N benzoyl aniline

b.benzal aniline

c.benzoyl aniline

d.N benzal aniline

79. 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

80. 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.105 min

c.70 min

d.125 min

81. Which will have the maximum solubility in water?

a.Tert. butyl alcohol

b.Methanol

c.1 butanol

d.Isobutyl alcohol

82. The hydrogen halide which has maximum boiling point is

a.HI

b.HBr

c.HF

d.HCl

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

a.promoter

b.inhibitor

c.autocatalyst

d.induced catalyst

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

a.Benzene and toluene

b.Ethyl alcohol and cyclohexane

c.Acetone and chloroform

d.Acetone and ethyl alcohol

85. Carbinol is

a.ethyl alcohol

b.methyl alcohol

c.2-propanol

d.1-butanol

86. Which of the following is a carcinogen?

a.Aniline

b.N-nitroso amine

c.Ethyl amine

d.Benzenediazonium chloride

87. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.25

b.2

c.3.3

d.2.5

88. 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.2.2

c.1.1

d.0.09

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

a.2

b.4

c.1

d.0

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

a.K energy level

b.N energy level

c.L energy level

d.M energy level

91. In neopentane the number of primary carbon atoms are

a.5

b.1

c.2

d.4

92. RCOCl reacts with R MgBr to yield

a.tertiary alcohol

b.secondary alcohol

c.ketone

d.primary alcohol

93. 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

94. Heisenberg test can be used to distinguish between

a.primary amines and secondary amines

b.primary amines and tertiary amines

c.primary amines, secondary amines and tertiary amine

d.All the above

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

a.methyl methanoate

b.formic acid

c.ethyl acetate

d.propyl methanoate

96. The bond angle in ammonia is

a.99 degree

b.106 degree

c.107 degree

d.110 degree

97. In the case of exothermic reactions equilibrium constant K

a.remains unchanged with temperature

b.decreases with temperature

c.increases with pressure

d.depends on the nature

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

a.neutron

b.positron

c.electron

d.meson

99. An azeotrope is one that

a.can be separated by distillation at critical solution temperature

b.can be separated by distillation above critical solution temperature

c.can be separated by distillation below critical solution temperature

d.cannot be separated by distillation

100. A mole of electrons is the same as

a.one

b.ampere-second

c.curie

d.faraday

CUET 2025 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2025

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