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. Carbinol is

a.methyl alcohol

b.ethyl alcohol

c.1-butanol

d.2-propanol

2. 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

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

a.0

b.4

c.1

d.2

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

a.is constant

b.decreases

c.increases

d.is zero

5. In the case of exothermic reactions equilibrium constant K

a.increases with pressure

b.decreases with temperature

c.depends on the nature

d.remains unchanged with temperature

6. All the radioactive changes are of

a.Second order

b.Zero order

c.Third order

d.First order

7. Hydrogen bomb is based on the phenomenon of

a.Nuclear fusion

b.Nuclear fission

c.Chemical reaction

d.Nuclear explosion

8. Calcium formate of heating gives

a.banzaldehyde

b.formic acid

c.formaldehyde

d.methanoic anhydride

9. 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.same nuclear charge

d.nuclear charge lower by one unit

10. 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 reactants remains same

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

11. 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 nitrate is insoluble in water

d.silver chloride is sparingly soluble in water

12. Wurtz reaction cannot be used for the preparation of

a.alkanes containing odd no. of C-atoms

b.methane

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

d.alkanes containing even no. of C-atoms

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

a.Acetone and ethyl alcohol

b.Ethyl alcohol and cyclohexane

c.Acetone and chloroform

d.Benzene and toluene

14. Acetic acid exists as dimer in benzene due to

a.presence of hydrogen atom at α-carbon

b.presence of carbonyl group

c.hydrogen bonding

d.condensation reaction

15. Which of the following is absorbed by HCl?

a.Ethanamine

b.Methyl alcohol

c.Ethylene

d.Acetylene

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

a.96 degree

b.180 degree

c.144 degree

d.90 degree

17. The chemical system in equilibrium is not affected by

a.change in the concentration of products

b.increase in the concentration of reactants

c.changing the temperature

d.addition of a catalyst

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

a.induced catalyst

b.inhibitor

c.promoter

d.autocatalyst

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

a.activation energy increases

b.value of rate constant increases

c.number of collisions get doubled

d.energy of activation decreases

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

a.36

b.5

c.9

d.27

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

a.increase considerably

b.is not affected

c.decreases

d.increases only if the products are gaseous

22. Which of the following has dipole moment?

a.1-propene

b.trans-2-butene

c.Both A and B

d.cis-2-butene

23. Mesitylene is

a.1, 3, 4 trimethyl benzene

b.2, 2, 4 trimethyl benzene

c.2, 3, 5 trimethyl benzene

d.1, 3, 5 trimethyl benzene

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

a.alcohols have ionic bond

b.alcohols have hydrogen bond

c.alcohols are miscible with water

d.alcohols contains –OH group

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

a.Thermometer

b.Calorimeter

c.Voltmeter

d.Ammeter

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

a.All the above

b.electron attracting group

c.free radical

d.electron repelling group

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

a.Benzaldehyde

b.Formaldehyde

c.Acetaldehyde

d.Acetone

28. In neopentane the number of primary carbon atoms are

a.5

b.4

c.1

d.2

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

a.nitro compound

b.diazo compound

c.benzene

d.azo compound

30. Heisenberg test can be used to distinguish between

a.primary amines, secondary amines and tertiary amine

b.primary amines and tertiary amines

c.All the above

d.primary amines and secondary amines

31. Schiffs bax is obtaind by the action of

a.p-amines with acid chloride

b.p-amines with acid anhydrides

c.All the above

d.p-amines with aldehydes

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

a.electron

b.positron

c.neutron

d.meson

33. Equivalent weight of ammonia is

a.17

b.31

c.2.7

d.14/3

34. Ammonium acetate on heating decomposes to give

a.acetylamine

b.amine

c.formamide

d.acetamide

35. Shape of the carboxyl group is

a.planar triangular

b.tetrahedral

c.pyramidal

d.octahedral

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

a.secondary amine

b.p-amine

c.quaternary salt

d.tert. amine

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

a.density decreases

b.m.pt. decreases

c.b.pt increases

d.f.pt. decreases

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

a.2-propene

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

c.1-propene

d.1-propanol

39. 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

40. Art of electroplating was enunciated by

a.Einstein

b.Ampere

c.Kohlorausch

d.Brugantally

41. Amongst HX, the maximum dipole moment is of

a.HF

b.HCl

c.HI

d.HBr

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

a.none of the above

b.Isobaric

c.Adiabatic

d.Isothermal

43. 1 Joule is equal to

a.0.04184 Cal

b.2.39 Cal

c.1.390 Cal

d.0.239 Cal

44. Which of the following is a carcinogen?

a.Benzenediazonium chloride

b.Ethyl amine

c.Aniline

d.N-nitroso amine

45. Nobels oil is

a.dinitro glycerine

b.glycerol trinitrate

c.trinitroglycol

d.glycerol

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

a.7

b.3

c.6

d.5

47. 75% of a radioactive element disintegrates in 6 days. Its half-life is

a.18 days

b.6 days

c.3 days

d.2 days

48. Radio-activity was discovered by

a.Madame Curie

b.J.J. Thomson

c.Rutherford

d.Henry Becquerel

49. Which of the following will have maximum entropy?

a.Diamond

b.Helium

c.Argon

d.Silver

50. Shape of amines is

a.pyramidal

b.tetrahedral

c.planar triangular

d.square planar

51. Which will have the maximum solubility in water?

a.Methanol

b.Isobutyl alcohol

c.Tert. butyl alcohol

d.1 butanol

52. The bond angle in ammonia is

a.99 degree

b.110 degree

c.106 degree

d.107 degree

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

a.24

b.5

c.6

d.16

54. Bromination of isobutene gives as major product

a.tert. butyl bromide

b.None of the above

c.isobutyl bromide

d.n-butyl bromide

55. Which of the following has minimum boiling point?

a.isopentane

b.neopentane

c.n-pentane

d.both A and B

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

a.1% aqueous solution of urea

b.1% aqueous solution of fructose

c.1% aqueous solution of sodium chloride

d.1% aqueous solution of methyl alcohol

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

a.3

b.15

c.9

d.2

58. 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 coloured

c.all the above

d.some are solid at room temperature

59. 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.25 days

c.50 days

d.100 days

60. A mole of electrons is the same as

a.curie

b.one

c.faraday

d.ampere-second

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

a.46

b.15

c.35

d.86

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

a.All the above

b.triphenyl methyl

c.benzyl

d.diphenyl methyl

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

a.providing higher potential from outside

b.changing the electrolytes in two half cells

c.reversing the electrodes

d.changing the conc. of the electrolytes

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

a.propyl methanoate

b.methyl methanoate

c.ethyl acetate

d.formic acid

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

a.K energy level

b.L energy level

c.N energy level

d.M energy level

66. In isopentane the number of secondary carbon atom is

a.0

b.1

c.2

d.3

67. An electrophile is a/an

a.Lewis acid

b.electron deficient species

c.Lewis base

d.Both A and B

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

a.inversely proportional to the conc.

b.independent of the conc.

c.directly proportional to the initial conc.

d.directly proportional to cube of the conc.

69. 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

70. Calcium acetate on heating gives

a.ethane

b.pentane

c.acetic anhydride

d.acetone

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

a.Nitrogen

b.Oxygen

c.Phosphorus

d.Iodine

72. Vinegar contains

a.7 to 8% acetic acid

b.100% acetic acid

c.10 to 12% acetic acid

d.19% acetic acid

73. Williamsons synthesis is used for preparing

a.ether

b.amines

c.ester

d.alcohol

74. Aniline condenses with benzaldehyde to give

a.benzal aniline

b.N benzal aniline

c.benzoyl aniline

d.N benzoyl aniline

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

a.2 faraday electricity is passed

b.1 amp. current for 1 hrs is passed

c.1 coulomb electricity is passed

d.3 amp current is passed

76. Propene on treatment with dil. sulphuric acid gives

a.None of above

b.2-propanol

c.A and B

d.1-propanol

77. Which of the following is a sedative?

a.Paraldehyde

b.Metaldehyde

c.Benzaldehyde

d.Paraformaldehyde

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

a.1 gm equivalent

b.5 gm mole

c.1 mole gm atom

d.3 mole

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

a.ethyne

b.methane

c.ethane

d.acetaldehyde

80. 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

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

a.7.9 m

b.8.9 m

c.9.8 m

d.14 m

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

a.Alkaline earth metal

b.Alkali earth metal

c.p-block

d.Transition elements

83. The hydrogen halide which has maximum boiling point is

a.HI

b.HF

c.HCl

d.HBr

84. 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.728

c.448

d.224

85. 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

86. RCOCl reacts with R MgBr to yield

a.primary alcohol

b.secondary alcohol

c.tertiary alcohol

d.ketone

87. Schiffs base on reduction give

a.aniline

b.p-amine

c.tert. amine

d.sec. amine

88. 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.125 min

c.70 min

d.105 min

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

a.1 propanal

b.2 methanal

c.2 methyl propane

d.Methoxy ethane

90. Acid present in the lemon is

a.citric acid

b.lactic acid

c.tartaric acid

d.acrylic acid

91. 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

92. Equilibrium constant changes with

a.pressure

b.temperature

c.time

d.both temperature and concentration

93. 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.0.9

c.1.1

d.2.2

94. 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

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

a.half as radioactive as the radium content

b.thrice as radioactive as the radium content

c.as radioactive as the radium content

d.no longer radioactive

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

a.Butyric acid

b.Acetic acid

c.Oxalic acid

d.Citric acid

97. The maximum number of molecules are in:

a.52 gram of nitrogen peroxide

b.14 gram of carbon dioxide

c.36 gram of water

d.48 gram of ethyl alcohol

98. 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

99. Formic acid is prepared by distilling glycerol with

a.oxalic acid at 240 degree Centigrade

b.tartaric acid at 10 degree Centigrade

c.oxalic acid at 110 degree Centigrade

d.lactic acid at 50 degree Centigrade

100. An azeotrope is one that

a.can be separated by distillation above critical solution temperature

b.can be separated by distillation below critical solution temperature

c.cannot be separated by distillation

d.can be separated by distillation at critical solution temperature

CUET 2024 Chemistry MCQ Question Answers – 100 MCQs for Practice

Chemistry MCQ Question Answers for CUET 2024

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