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

a.alcohols contains –OH group

b.alcohols have hydrogen bond

c.alcohols are miscible with water

d.alcohols have ionic bond

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

a.144 degree

b.96 degree

c.180 degree

d.90 degree

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

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

b.1-propanol

c.2-propene

d.1-propene

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

a.electron

b.neutron

c.meson

d.positron

5. The maximum number of molecules are in:

a.52 gram of nitrogen peroxide

b.36 gram of water

c.14 gram of carbon dioxide

d.48 gram of ethyl alcohol

6. Which of the following has minimum boiling point?

a.both A and B

b.isopentane

c.neopentane

d.n-pentane

7. 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.2 faraday electricity is passed

d.1 amp. current for 1 hrs is passed

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

a.1 gm equivalent

b.3 mole

c.1 mole gm atom

d.5 gm mole

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

a.tert. amine

b.quaternary salt

c.p-amine

d.secondary amine

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

a.electron attracting group

b.free radical

c.electron repelling group

d.All the above

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

a.6

b.3

c.7

d.5

12. RCOCl reacts with R MgBr to yield

a.ketone

b.primary alcohol

c.secondary alcohol

d.tertiary alcohol

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

a.2.5

b.3.3

c.2

d.25

14. Shape of amines is

a.pyramidal

b.square planar

c.tetrahedral

d.planar triangular

15. Nobels oil is

a.trinitroglycol

b.glycerol trinitrate

c.glycerol

d.dinitro glycerine

16. Calcium acetate on heating gives

a.acetone

b.acetic anhydride

c.ethane

d.pentane

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

a.Butyric acid

b.Oxalic acid

c.Citric acid

d.Acetic acid

18. 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.25 days

b.100 days

c.50 days

d.75 days

19. Acid present in the lemon is

a.citric acid

b.tartaric acid

c.acrylic acid

d.lactic acid

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

a.no longer radioactive

b.as radioactive as the radium content

c.thrice as radioactive as the radium content

d.half as radioactive as the radium content

21. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.2 days

b.3 days

c.18 days

d.6 days

22. Williamsons synthesis is used for preparing

a.amines

b.alcohol

c.ether

d.ester

23. 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.0.09

c.0.9

d.1.1

24. Carbinol is

a.ethyl alcohol

b.2-propanol

c.methyl alcohol

d.1-butanol

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

a.All the above

b.triphenyl methyl

c.benzyl

d.diphenyl methyl

26. 1 Joule is equal to

a.1.390 Cal

b.0.239 Cal

c.0.04184 Cal

d.2.39 Cal

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

a.activation energy increases

b.number of collisions get doubled

c.value of rate constant increases

d.energy of activation decreases

28. Acetic acid exists as dimer in benzene due to

a.condensation reaction

b.presence of carbonyl group

c.hydrogen bonding

d.presence of hydrogen atom at α-carbon

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

a.azo compound

b.benzene

c.nitro compound

d.diazo compound

30. Which will have the maximum solubility in water?

a.1 butanol

b.Isobutyl alcohol

c.Methanol

d.Tert. butyl alcohol

31. 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

32. In neopentane the number of primary carbon atoms are

a.5

b.1

c.2

d.4

33. Which of the following will have maximum entropy?

a.Silver

b.Helium

c.Argon

d.Diamond

34. The hydrogen halide which has maximum boiling point is

a.HCl

b.HI

c.HF

d.HBr

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

a.Adiabatic

b.Isobaric

c.Isothermal

d.none of the above

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

a.methyl methanoate

b.ethyl acetate

c.formic acid

d.propyl methanoate

37. 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.142

c.728

d.448

38. 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

39. Which of the following is a sedative?

a.Paraldehyde

b.Metaldehyde

c.Paraformaldehyde

d.Benzaldehyde

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

a.the reaction is instantaneous

b.silver chloride is sparingly soluble in water

c.solubility of silver nitrate increases with sodium chloride

d.silver nitrate is insoluble in water

41. Propene on treatment with dil. sulphuric acid gives

a.A and B

b.2-propanol

c.1-propanol

d.None of above

42. In isopentane the number of secondary carbon atom is

a.1

b.0

c.2

d.3

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

a.Formaldehyde

b.Acetaldehyde

c.Benzaldehyde

d.Acetone

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

a.hydroxide

b.sodium

c.none of these

d.chloride

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

a.changing the conc. of the electrolytes

b.changing the electrolytes in two half cells

c.providing higher potential from outside

d.reversing the electrodes

46. Mesitylene is

a.2, 3, 5 trimethyl benzene

b.1, 3, 4 trimethyl benzene

c.2, 2, 4 trimethyl benzene

d.1, 3, 5 trimethyl benzene

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

a.Voltmeter

b.Ammeter

c.Thermometer

d.Calorimeter

48. Schiffs bax is obtaind by the action of

a.p-amines with acid anhydrides

b.p-amines with acid chloride

c.All the above

d.p-amines with aldehydes

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

a.hydrogen bond

b.ionic bond

c.Van der Waals interaction

d.polar covalent bond

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

a.0

b.2

c.4

d.1

51. Salt Bridge is used because it

a.provides the extra ions

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

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

d.maintains the electrical neutrality of the two half cells

52. Equivalent weight of ammonia is

a.17

b.31

c.14/3

d.2.7

53. Radio-activity was discovered by

a.Henry Becquerel

b.J.J. Thomson

c.Rutherford

d.Madame Curie

54. An electrophile is a/an

a.Lewis acid

b.electron deficient species

c.Lewis base

d.Both A and B

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

a.3

b.15

c.2

d.9

56. All the radioactive changes are of

a.Second order

b.Third order

c.Zero order

d.First order

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

a.14 m

b.8.9 m

c.7.9 m

d.9.8 m

58. A mole of electrons is the same as

a.one

b.ampere-second

c.curie

d.faraday

59. Which of the following is a carcinogen?

a.Aniline

b.N-nitroso amine

c.Ethyl amine

d.Benzenediazonium chloride

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

a.Potassium-Argon method

b.Uranium lead method

c.Radium-silicon method

d.Carbon 14 dating method

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

a.b.pt increases

b.density decreases

c.f.pt. decreases

d.m.pt. decreases

62. The bond angle in ammonia is

a.106 degree

b.110 degree

c.107 degree

d.99 degree

63. Equilibrium constant changes with

a.pressure

b.both temperature and concentration

c.temperature

d.time

64. Hydrogen bomb is based on the phenomenon of

a.Nuclear explosion

b.Nuclear fusion

c.Chemical reaction

d.Nuclear fission

65. 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.

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

a.9

b.36

c.5

d.27

67. Ammonium acetate on heating decomposes to give

a.formamide

b.amine

c.acetylamine

d.acetamide

68. Amongst HX, the maximum dipole moment is of

a.HCl

b.HI

c.HF

d.HBr

69. 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 urea

d.1% aqueous solution of fructose

70. Which of the following is absorbed by HCl?

a.Ethylene

b.Acetylene

c.Methyl alcohol

d.Ethanamine

71. 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 lower by one unit

d.nuclear charge higher by one unit

72. Shape of the carboxyl group is

a.pyramidal

b.octahedral

c.planar triangular

d.tetrahedral

73. Bromination of isobutene gives as major product

a.tert. butyl bromide

b.isobutyl bromide

c.None of the above

d.n-butyl bromide

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

a.L energy level

b.K energy level

c.N energy level

d.M energy level

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

a.5

b.24

c.6

d.16

76. Which of the following has dipole moment?

a.1-propene

b.cis-2-butene

c.trans-2-butene

d.Both A and B

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

a.autocatalyst

b.inhibitor

c.induced catalyst

d.promoter

78. Aniline condenses with benzaldehyde to give

a.benzal aniline

b.N benzoyl aniline

c.N benzal aniline

d.benzoyl aniline

79. Vinegar contains

a.10 to 12% acetic acid

b.19% acetic acid

c.100% acetic acid

d.7 to 8% acetic acid

80. 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

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

a.Oxygen

b.Iodine

c.Nitrogen

d.Phosphorus

82. Heisenberg test can be used to distinguish between

a.primary amines, secondary amines and tertiary amine

b.primary amines and secondary amines

c.primary amines and tertiary amines

d.All the above

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

a.increases

b.is constant

c.is zero

d.decreases

84. Formic acid is prepared by distilling glycerol with

a.oxalic acid at 110 degree Centigrade

b.tartaric acid at 10 degree Centigrade

c.lactic acid at 50 degree Centigrade

d.oxalic acid at 240 degree Centigrade

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

a.Ethyl alcohol and cyclohexane

b.Acetone and chloroform

c.Benzene and toluene

d.Acetone and ethyl alcohol

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

a.methane

b.acetaldehyde

c.ethyne

d.ethane

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

a.2 methyl propane

b.1 propanal

c.Methoxy ethane

d.2 methanal

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

a.46

b.35

c.86

d.15

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

a.70 min

b.125 min

c.105 min

d.50 min

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

d.methane

91. Once the equilibrium is reached under given condition:

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

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

c.Conc. of reactants remains same

d.Conc. of products remains same

92. Art of electroplating was enunciated by

a.Kohlorausch

b.Brugantally

c.Ampere

d.Einstein

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

a.Alkaline earth metal

b.p-block

c.Alkali earth metal

d.Transition elements

94. The chemical system in equilibrium is not affected by

a.change in the concentration of products

b.changing the temperature

c.increase in the concentration of reactants

d.addition of a catalyst

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

a.remains constant

b.goes on increasing

c.may increase or decrease

d.decreases

96. Calcium formate of heating gives

a.methanoic anhydride

b.banzaldehyde

c.formaldehyde

d.formic acid

97. Schiffs base on reduction give

a.aniline

b.tert. amine

c.p-amine

d.sec. amine

98. In the case of exothermic reactions equilibrium constant K

a.decreases with temperature

b.depends on the nature

c.remains unchanged with temperature

d.increases with pressure

99. An azeotrope is one that

a.can be separated by distillation below 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 above critical solution temperature

100. 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.-44.2 Kcal/mol

b.500 cal/mol

c.-21.12 Kcal/mol

d.500 cal/gm

CUET 2024 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2024

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