CUET 2024 Chemistry MCQs 100 Questions for CUET Exam

Chemistry MCQ Question Answers for CUET 2024

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 2024 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. Acetic acid exists as dimer in benzene due to

a.condensation reaction

b.presence of hydrogen atom at α-carbon

c.hydrogen bonding

d.presence of carbonyl group

2. Aniline condenses with benzaldehyde to give

a.benzoyl aniline

b.N benzoyl aniline

c.benzal aniline

d.N benzal aniline

3. The bond angle in ammonia is

a.107 degree

b.106 degree

c.110 degree

d.99 degree

4. 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

5. In isopentane the number of secondary carbon atom is

a.1

b.3

c.0

d.2

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

a.decreases

b.increases

c.is zero

d.is constant

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

a.some are solid at room temperature

b.all the above

c.energy of activation differs from one reaction to another

d.some are coloured

8. A mole of electrons is the same as

a.curie

b.one

c.faraday

d.ampere-second

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

a.Benzaldehyde

b.Acetaldehyde

c.Formaldehyde

d.Acetone

10. Which of the following has dipole moment?

a.trans-2-butene

b.1-propene

c.Both A and B

d.cis-2-butene

11. Vinegar contains

a.7 to 8% acetic acid

b.10 to 12% acetic acid

c.19% acetic acid

d.100% acetic acid

12. Amongst HX, the maximum dipole moment is of

a.HF

b.HBr

c.HCl

d.HI

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

a.96 degree

b.144 degree

c.90 degree

d.180 degree

14. An electrophile is a/an

a.Lewis base

b.electron deficient species

c.Both A and B

d.Lewis acid

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.-21.12 Kcal/mol

c.-44.2 Kcal/mol

d.500 cal/gm

16. Shape of the carboxyl group is

a.octahedral

b.planar triangular

c.tetrahedral

d.pyramidal

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

a.16

b.5

c.6

d.24

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

a.46

b.86

c.15

d.35

19. 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.224

b.448

c.142

d.728

20. Which of the following has minimum boiling point?

a.isopentane

b.both A and B

c.n-pentane

d.neopentane

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

a.2

b.1

c.0

d.4

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

a.alcohols contains –OH group

b.alcohols have ionic bond

c.alcohols are miscible with water

d.alcohols have hydrogen bond

23. 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.70 min

c.125 min

d.105 min

24. Ammonium acetate on heating decomposes to give

a.amine

b.formamide

c.acetamide

d.acetylamine

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

a.propyl methanoate

b.formic acid

c.methyl methanoate

d.ethyl acetate

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

a.triphenyl methyl

b.diphenyl methyl

c.benzyl

d.All the above

27. Equivalent weight of ammonia is

a.17

b.31

c.2.7

d.14/3

28. 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

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

a.tert. amine

b.secondary amine

c.quaternary salt

d.p-amine

30. Hydrogen bomb is based on the phenomenon of

a.Nuclear explosion

b.Nuclear fission

c.Chemical reaction

d.Nuclear fusion

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.2.2

b.0.9

c.1.1

d.0.09

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

a.1% aqueous solution of methyl alcohol

b.1% aqueous solution of sodium chloride

c.1% aqueous solution of fructose

d.1% aqueous solution of urea

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

a.hydrogen bond

b.polar covalent bond

c.Van der Waals interaction

d.ionic bond

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

a.Isothermal

b.Adiabatic

c.none of the above

d.Isobaric

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

a.providing higher potential from outside

b.changing the conc. of the electrolytes

c.reversing the electrodes

d.changing the electrolytes in two half cells

36. Which of the following is a carcinogen?

a.N-nitroso amine

b.Aniline

c.Benzenediazonium chloride

d.Ethyl amine

37. In neopentane the number of primary carbon atoms are

a.2

b.1

c.4

d.5

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

a.electron attracting group

b.All the above

c.free radical

d.electron repelling group

39. 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

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

a.1 propanal

b.2 methanal

c.Methoxy ethane

d.2 methyl propane

41. Equilibrium constant changes with

a.both temperature and concentration

b.pressure

c.time

d.temperature

42. Once the equilibrium is reached under given condition:

a.Conc. of products remains same

b.Conc. of reactants remains same

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

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

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

a.f.pt. decreases

b.m.pt. decreases

c.density decreases

d.b.pt increases

44. 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

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

a.independent of the conc.

b.directly proportional to the initial conc.

c.inversely proportional to the conc.

d.directly proportional to cube of the conc.

46. 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

47. Bromination of isobutene gives as major product

a.None of the above

b.tert. butyl bromide

c.n-butyl bromide

d.isobutyl bromide

48. Shape of amines is

a.tetrahedral

b.planar triangular

c.square planar

d.pyramidal

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

a.Acetone and chloroform

b.Acetone and ethyl alcohol

c.Ethyl alcohol and cyclohexane

d.Benzene and toluene

50. Schiffs bax is obtaind by the action of

a.p-amines with acid chloride

b.p-amines with aldehydes

c.All the above

d.p-amines with acid anhydrides

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

a.p-block

b.Alkali earth metal

c.Alkaline earth metal

d.Transition elements

52. Radio-activity was discovered by

a.Madame Curie

b.Rutherford

c.Henry Becquerel

d.J.J. Thomson

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

a.9.8 m

b.14 m

c.7.9 m

d.8.9 m

54. In the case of o-chlorophenol there exist

a.intramolecular hydrogen bonding

b.both inter and intramolecular hydrogen bonding

c.no hydrogen bonding

d.intermolecular covalent bonding

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

a.ethane

b.acetaldehyde

c.methane

d.ethyne

56. The hydrogen halide which has maximum boiling point is

a.HCl

b.HI

c.HBr

d.HF

57. Which of the following is a sedative?

a.Metaldehyde

b.Benzaldehyde

c.Paraldehyde

d.Paraformaldehyde

58. 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.methane

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

59. Schiffs base on reduction give

a.aniline

b.p-amine

c.sec. amine

d.tert. amine

60. Art of electroplating was enunciated by

a.Brugantally

b.Ampere

c.Einstein

d.Kohlorausch

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

a.azo compound

b.diazo compound

c.benzene

d.nitro compound

62. Calcium acetate on heating gives

a.ethane

b.acetone

c.pentane

d.acetic anhydride

63. 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

64. 1 Joule is equal to

a.1.390 Cal

b.2.39 Cal

c.0.04184 Cal

d.0.239 Cal

65. Which of the following is absorbed by HCl?

a.Ethanamine

b.Methyl alcohol

c.Acetylene

d.Ethylene

66. All the radioactive changes are of

a.Zero order

b.Third order

c.First order

d.Second order

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

a.Calorimeter

b.Ammeter

c.Thermometer

d.Voltmeter

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

a.chloride

b.hydroxide

c.sodium

d.none of these

69. Carbinol is

a.2-propanol

b.ethyl alcohol

c.methyl alcohol

d.1-butanol

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

a.Oxalic acid

b.Acetic acid

c.Citric acid

d.Butyric acid

71. 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.the reaction is instantaneous

d.solubility of silver nitrate increases with sodium chloride

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

a.3

b.7

c.6

d.5

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

a.decreases

b.may increase or decrease

c.remains constant

d.goes on increasing

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

a.2-propene

b.1-propanol

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

d.1-propene

75. Which will have the maximum solubility in water?

a.Isobutyl alcohol

b.Methanol

c.Tert. butyl alcohol

d.1 butanol

76. 100 gram of caustic soda is dissolved in 1 kg of water, the molality of the solution is

a.3.3

b.2.5

c.2

d.25

77. 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 below critical solution temperature

d.can be separated by distillation at critical solution temperature

78. 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

79. RCOCl reacts with R MgBr to yield

a.tertiary alcohol

b.secondary alcohol

c.primary alcohol

d.ketone

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

a.3 mole

b.5 gm mole

c.1 gm equivalent

d.1 mole gm atom

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

a.promoter

b.inhibitor

c.induced catalyst

d.autocatalyst

82. 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.100 days

c.25 days

d.50 days

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

a.3

b.2

c.9

d.15

84. Williamsons synthesis is used for preparing

a.ester

b.alcohol

c.ether

d.amines

85. Nobels oil is

a.glycerol

b.trinitroglycol

c.dinitro glycerine

d.glycerol trinitrate

86. 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

87. Mesitylene is

a.2, 2, 4 trimethyl benzene

b.2, 3, 5 trimethyl benzene

c.1, 3, 5 trimethyl benzene

d.1, 3, 4 trimethyl benzene

88. Which of the following will have maximum entropy?

a.Diamond

b.Argon

c.Helium

d.Silver

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

a.number of collisions get doubled

b.activation energy increases

c.energy of activation decreases

d.value of rate constant increases

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

a.3 amp current is passed

b.1 coulomb electricity is passed

c.1 amp. current for 1 hrs is passed

d.2 faraday electricity is passed

91. The maximum number of molecules are in:

a.14 gram of carbon dioxide

b.48 gram of ethyl alcohol

c.36 gram of water

d.52 gram of nitrogen peroxide

92. Calcium formate of heating gives

a.formaldehyde

b.formic acid

c.methanoic anhydride

d.banzaldehyde

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. Propene on treatment with dil. sulphuric acid gives

a.1-propanol

b.None of above

c.2-propanol

d.A and B

95. Acid present in the lemon is

a.citric acid

b.acrylic acid

c.lactic acid

d.tartaric acid

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

a.neutron

b.positron

c.electron

d.meson

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

a.9

b.27

c.36

d.5

98. 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

99. 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

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

a.Nitrogen

b.Iodine

c.Oxygen

d.Phosphorus

CUET 2024 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2024

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