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. In isopentane the number of secondary carbon atom is

a.2

b.0

c.3

d.1

2. 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.8.9 m

d.7.9 m

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

a.ethane

b.methane

c.ethyne

d.acetaldehyde

4. 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.2.2

c.0.9

d.0.09

5. 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

6. The maximum number of molecules are in:

a.48 gram of ethyl alcohol

b.52 gram of nitrogen peroxide

c.36 gram of water

d.14 gram of carbon dioxide

7. 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.-21.12 Kcal/mol

b.500 cal/mol

c.-44.2 Kcal/mol

d.500 cal/gm

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

a.nitro compound

b.diazo compound

c.benzene

d.azo compound

9. Art of electroplating was enunciated by

a.Einstein

b.Kohlorausch

c.Ampere

d.Brugantally

10. Shape of amines is

a.pyramidal

b.square planar

c.tetrahedral

d.planar triangular

11. Radio-activity was discovered by

a.Madame Curie

b.Rutherford

c.Henry Becquerel

d.J.J. Thomson

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

a.Formaldehyde

b.Acetaldehyde

c.Acetone

d.Benzaldehyde

13. Propene on treatment with dil. sulphuric acid gives

a.1-propanol

b.2-propanol

c.A and B

d.None of above

14. The bond angle in ammonia is

a.107 degree

b.110 degree

c.106 degree

d.99 degree

15. An azeotrope is one that

a.cannot be separated by distillation

b.can be separated by distillation below critical solution temperature

c.can be separated by distillation at critical solution temperature

d.can be separated by distillation above critical solution temperature

16. Vinegar contains

a.100% acetic acid

b.10 to 12% acetic acid

c.19% acetic acid

d.7 to 8% acetic acid

17. In neopentane the number of primary carbon atoms are

a.4

b.5

c.2

d.1

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

a.solubility of silver nitrate increases with sodium chloride

b.the reaction is instantaneous

c.silver chloride is sparingly soluble in water

d.silver nitrate is insoluble in water

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

a.activation energy increases

b.number of collisions get doubled

c.energy of activation decreases

d.value of rate constant increases

20. Acid present in the lemon is

a.citric acid

b.acrylic acid

c.tartaric acid

d.lactic acid

21. An electrophile is a/an

a.Both A and B

b.Lewis acid

c.Lewis base

d.electron deficient species

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

a.2

b.0

c.1

d.4

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

a.1 coulomb electricity is passed

b.3 amp current is passed

c.1 amp. current for 1 hrs is passed

d.2 faraday electricity is passed

24. Which of the following has dipole moment?

a.trans-2-butene

b.1-propene

c.Both A and B

d.cis-2-butene

25. Bromination of isobutene gives as major product

a.isobutyl bromide

b.n-butyl bromide

c.None of the above

d.tert. butyl bromide

26. 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

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

a.Citric acid

b.Acetic acid

c.Oxalic acid

d.Butyric acid

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

a.Carbon 14 dating method

b.Radium-silicon method

c.Uranium lead method

d.Potassium-Argon method

29. 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

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

a.remains constant

b.decreases

c.goes on increasing

d.may increase or decrease

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

a.p-block

b.Alkaline earth metal

c.Transition elements

d.Alkali earth metal

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

a.ethyl acetate

b.formic acid

c.propyl methanoate

d.methyl methanoate

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

a.inhibitor

b.autocatalyst

c.induced catalyst

d.promoter

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

a.3

b.2

c.9

d.15

35. Nobels oil is

a.glycerol trinitrate

b.dinitro glycerine

c.glycerol

d.trinitroglycol

36. Which of the following is a sedative?

a.Paraformaldehyde

b.Paraldehyde

c.Benzaldehyde

d.Metaldehyde

37. Acetic acid exists as dimer in benzene due to

a.presence of hydrogen atom at α-carbon

b.condensation reaction

c.hydrogen bonding

d.presence of carbonyl group

38. Wurtz reaction cannot be used for the preparation of

a.alkanes containing even no. of C-atoms

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

c.methane

d.alkanes containing odd no. of C-atoms

39. Which of the following has minimum boiling point?

a.both A and B

b.neopentane

c.n-pentane

d.isopentane

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

a.Van der Waals interaction

b.polar covalent bond

c.hydrogen bond

d.ionic bond

41. 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.142

b.224

c.448

d.728

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

a.tert. amine

b.p-amine

c.quaternary salt

d.secondary amine

43. Heisenberg test can be used to distinguish between

a.primary amines and tertiary amines

b.All the above

c.primary amines and secondary amines

d.primary amines, secondary amines and tertiary amine

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

a.6

b.5

c.24

d.16

45. Salt Bridge is used because it

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

b.provides the extra ions

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

d.maintains the electrical neutrality of the two half cells

46. Which of the following is a carcinogen?

a.N-nitroso amine

b.Aniline

c.Ethyl amine

d.Benzenediazonium chloride

47. Amongst HX, the maximum dipole moment is of

a.HCl

b.HF

c.HBr

d.HI

48. 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.100 days

b.25 days

c.50 days

d.75 days

49. Calcium acetate on heating gives

a.acetic anhydride

b.pentane

c.ethane

d.acetone

50. The hydrogen halide which has maximum boiling point is

a.HBr

b.HI

c.HCl

d.HF

51. Which of the following will have maximum entropy?

a.Diamond

b.Helium

c.Silver

d.Argon

52. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.6 days

b.18 days

c.2 days

d.3 days

53. In the case of o-chlorophenol there exist

a.no hydrogen bonding

b.both inter and intramolecular hydrogen bonding

c.intermolecular covalent bonding

d.intramolecular hydrogen bonding

54. Carbinol is

a.2-propanol

b.1-butanol

c.methyl alcohol

d.ethyl alcohol

55. Which of the following is absorbed by HCl?

a.Acetylene

b.Methyl alcohol

c.Ethylene

d.Ethanamine

56. A mole of electrons is the same as

a.curie

b.one

c.ampere-second

d.faraday

57. 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

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

a.5

b.6

c.7

d.3

59. Formic acid is prepared by distilling glycerol with

a.tartaric acid at 10 degree Centigrade

b.oxalic acid at 240 degree Centigrade

c.oxalic acid at 110 degree Centigrade

d.lactic acid at 50 degree Centigrade

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

a.chloride

b.none of these

c.hydroxide

d.sodium

61. 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

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

a.2 methyl propane

b.2 methanal

c.Methoxy ethane

d.1 propanal

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

a.144 degree

b.90 degree

c.96 degree

d.180 degree

64. Calcium formate of heating gives

a.formaldehyde

b.methanoic anhydride

c.formic acid

d.banzaldehyde

65. 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

66. Schiffs base on reduction give

a.aniline

b.p-amine

c.sec. amine

d.tert. amine

67. Equivalent weight of ammonia is

a.2.7

b.17

c.31

d.14/3

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

a.some are solid at room temperature

b.energy of activation differs from one reaction to another

c.some are coloured

d.all the above

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

a.Phosphorus

b.Iodine

c.Oxygen

d.Nitrogen

70. 1 Joule is equal to

a.0.239 Cal

b.1.390 Cal

c.0.04184 Cal

d.2.39 Cal

71. Aniline condenses with benzaldehyde to give

a.N benzal aniline

b.benzoyl aniline

c.benzal aniline

d.N benzoyl aniline

72. 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.is not affected

d.decreases

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

a.directly proportional to cube of the conc.

b.independent of the conc.

c.directly proportional to the initial conc.

d.inversely proportional to the conc.

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

a.reversing the electrodes

b.changing the electrolytes in two half cells

c.changing the conc. of the electrolytes

d.providing higher potential from outside

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

a.Voltmeter

b.Ammeter

c.Thermometer

d.Calorimeter

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

a.electron repelling group

b.All the above

c.electron attracting group

d.free radical

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

a.benzyl

b.triphenyl methyl

c.All the above

d.diphenyl methyl

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

a.1-propanol

b.2-propene

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

d.1-propene

79. 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.no longer radioactive

d.half as radioactive as the radium content

80. Which will have the maximum solubility in water?

a.1 butanol

b.Isobutyl alcohol

c.Methanol

d.Tert. butyl alcohol

81. 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 contains –OH group

d.alcohols have ionic bond

82. The chemical system in equilibrium is not affected by

a.addition of a catalyst

b.change in the concentration of products

c.increase in the concentration of reactants

d.changing the temperature

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

a.15

b.35

c.86

d.46

84. In the case of exothermic reactions equilibrium constant K

a.depends on the nature

b.remains unchanged with temperature

c.decreases 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.2.5

b.2

c.25

d.3.3

86. 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

87. Shape of the carboxyl group is

a.pyramidal

b.octahedral

c.tetrahedral

d.planar triangular

88. Williamsons synthesis is used for preparing

a.ether

b.amines

c.ester

d.alcohol

89. Equilibrium constant changes with

a.both temperature and concentration

b.pressure

c.time

d.temperature

90. Ammonium acetate on heating decomposes to give

a.amine

b.formamide

c.acetamide

d.acetylamine

91. All the radioactive changes are of

a.Zero order

b.Second order

c.Third order

d.First order

92. Hydrogen bomb is based on the phenomenon of

a.Chemical reaction

b.Nuclear explosion

c.Nuclear fusion

d.Nuclear fission

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

a.meson

b.electron

c.positron

d.neutron

94. RCOCl reacts with R MgBr to yield

a.primary alcohol

b.secondary alcohol

c.ketone

d.tertiary alcohol

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

a.m.pt. decreases

b.f.pt. decreases

c.density decreases

d.b.pt increases

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

a.is constant

b.increases

c.is zero

d.decreases

97. 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 higher by one unit

d.nuclear charge lower by one unit

98. 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

99. Schiffs bax is obtaind by the action of

a.p-amines with aldehydes

b.All the above

c.p-amines with acid chloride

d.p-amines with acid anhydrides

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

a.5

b.27

c.9

d.36

CUET 2024 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2024

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