Class 12 Chemistry Ch-10 Haloalkanes and Haloarenes MCQs Exam 2027

Topic 1: Introduction & IUPAC Nomenclature

1. The number of $\pi$-bonds in ethyne is: [BSEB, 2015 A]

(A) 1

(B) 2

(C) 3

(D) 4

2. The IUPAC name of $CH_3-C(CH_3)(Br)-CH_3$ is: [BSEB, 2023 A]

(A) Tertiary butyl chloride

(B) Secondary butyl chloride

(C) 2-Bromo-2-methylpropane

(D) 2,2-Dimethyl-1-bromopropane

3. Chloroform is a: [BSEB, 2025 A]

(A) Primary halide

(B) Tertiary halide

(C) Trihalogen derivative

(D) Tetrahalogen derivative

4. The IUPAC name of $CH_3-CH(Cl)-CH(CH_3)-CH_3$ is: [BSEB, 2025 A]

(A) 3-Chloro-2-methylbutane

(B) 2-Chloro-3-methylbutane

(C) Isobutyl chloride

(D) Secondary butyl chloride

5. The number of sigma ($\sigma$) bonds in $CH_4$ is: [BSEB, 2019 A]

(A) 4

(B) 3

(C) 2

(D) 1

6. The valency of carbon is: [BSEB, 2016 A]

(A) 1

(B) 2

(C) 3

(D) 4

7. Which of the following is a vinyl halide? [BSEB, 2023 A]

(A) $CH_2=CH-CHBrCH_3$

(B) $CH_2=CH-Br$

(C) $CH_2=CH-CH_2CH_2Cl$

(D) $HC \equiv C-Br$

8. The IUPAC name of $CH_3-CH(Cl)-CH_2-CH_2Cl$ is: [BSEB, 2024 A]

(A) 1-Chloro-2-methylbutane

(B) 1-Chloroisopentane

(C) 1,3-Dichlorobutane

(D) None of these

Topic 2: Methods of Preparation

9. To prepare Grignard reagent, $Mg$ is reacted in ether with: [BSEB, 2017 A]

(A) $C_2H_5OH$

(B) $C_2H_6$

(C) $C_2H_5Cl$

(D) $C_2H_5CN$

10. Reaction of ethyl alcohol with $PCl_5$ gives: [BSEB, 2015 A]

(A) $C_2H_5Cl$

(B) $C_2H_6$

(C) $C_2H_4$

(D) $POCl_3$

11. The reagent used to convert but-1-ol to 1-bromobutane is: [BSEB, 2022 A]

(A) $CHBr_3$

(B) $Br_2$

(C) $CH_3Br$

(D) $PBr_3$

12. Which compound is formed when $C_6H_6 + Cl_2 \text{ (excess)} \xrightarrow{\text{Sunlight}} \dots$? [BSEB, 2022 A]

(A) Chlorobenzene

(B) $p$-Dichlorobenzene

(C) Hexachlorobenzene

(D) Benzene Hexachloride (BHC)

13. In the absence of peroxide, the first step in the addition of $HBr$ to propene involves: [BSEB]

(A) $H^+$

(B) $Br^-$

(C) $H^\bullet$

(D) $Br^\bullet$

Topic 3: Reaction Mechanisms ($S_N1$ & $S_N2$)

14. In $S_N2$ mechanism, the formation of which of the following takes place? [BSEB, 2021 A]

(A) Carbocation

(B) Transition state

(C) Free radical

(D) Carbanion

15. Most reactive towards $S_N1$ reaction is: [BSEB, 2018 A]

(A) $CH_3CH_2Cl$

(B) $C_6H_5CH_2Cl$

(C) $C_6H_5Cl$

(D) $(CH_3)_3CCl$

16. Which of the following alkyl halides undergoes hydrolysis by $S_N1$ mechanism? [BSEB, 2024 A]

(A) $CH_3Cl$

(B) $CH_3CH_2X$

(C) $(CH_3)_2CHX$

(D) $(CH_3)_3CX$

17. Which alkyl halide follows only $S_N2$ mechanism? [BSEB, 2018 A]

(A) $CH_3-X$

(B) $(CH_3)_2CH-X$

(C) $(CH_3)_3C-X$

(D) $C_6H_5-CH_2X$

18. $S_N1$ reaction of alkyl halides provides: [BSEB, 2021 A]

(A) Diversion of structure

(B) Racemization

(C) Inversion of structure

(D) None

19. $C_2H_5Br + NaOH \xrightarrow{C_2H_5OH} C_2H_5OH + NaBr$ is which type of reaction? [BSEB, 2024 A]

(A) Electrophilic substitution

(B) Nucleophilic substitution

(C) Elimination

(D) Addition

Topic 4: Named Reactions

20. The reaction $2C_6H_5X + 2Na \xrightarrow{\text{Ether}} C_6H_5-C_6H_5 + 2NaX$ is called: [BSEB, 2021 A]

(A) Fittig reaction

(B) Wurtz reaction

(C) Wurtz-Fittig reaction

(D) Kolbe reaction

21. The reaction $R-X + 2Na + X-R \xrightarrow{\text{Dry Ether}} R-R + 2NaX$ is called: [BSEB, 2015 A]

(A) Fittig reaction

(B) Wurtz reaction

(C) Friedel-Crafts reaction

(D) Clemmensen reaction

22. Reaction between alkyl halide and sodium metal is called: [BSEB, 2021 A]

(A) Wurtz reaction

(B) Kolbe reaction

(C) Clemmensen reaction

(D) None of these

23. Chlorobenzene reacts with sodium in dry ether to give diphenyl, this is called: [BSEB, 2012 A]

(A) Wurtz reaction

(B) Fittig reaction

(C) Wurtz-Fittig reaction

(D) Kolbe reaction

Topic 5: Reagents & Tests

24. Lucas reagent is: [BSEB, 2024 A]

(A) Anhydrous $ZnCl_2$ and conc. $HCl$

(B) Anhydrous $CaCl_2$ and conc. $HCl$

(C) Anhydrous $AlCl_2$ and conc. $HCl$

(D) Anhydrous $PdCl_2$ and conc. $HCl$

25. Which of the following gives Iodoform test? [BSEB, 2022 A]

(A) $CH_3OH$

(B) $(CH_3)_2CHOH$

(C) $(CH_3)_3COH$

(D) $CH_3-CH_2-CH_2-OH$

26. Chlorobenzene heated with $H_2SO_4$ gives: [BSEB, 2020 A]

(A) $o$-Chlorobenzene sulfonic acid

(B) $p$-Chlorobenzene sulfonic acid

(C) Both (A) and (B)

(D) None of these

27. $CO_2$ reacts with Grignard reagent to give: [BSEB, 2021 A]

(A) Carboxylic acid

(B) Aldehyde

(C) Ketone

(D) None of these

Topic 6: Polyhalogen Compounds

28. Chloroform is stored in dark colored bottles because: [BSEB, 2017 A]

(A) It evaporates

(B) It oxidizes by air and light to form poisonous gas (phosgene)

(C) It reacts with glass

(D) None of these

29. Which of the following is used as a refrigerant? [BSEB, 2021 A]

(A) $CCl_4$

(B) $CF_4$

(C) $CF_2Cl_2$

(D) $CH_2Cl_2$

30. When chloral is heated with chlorobenzene in presence of conc. $H_2SO_4$, it forms: [BSEB, 2021 A]

(A) PVC

(B) DDT

(C) BHC

(D) Freon-12

31. Iodoform heated with silver powder gives: [BSEB, 2021 A]

(A) Acetylene ($C_2H_2$)

(B) Ethylene ($C_2H_4$)

(C) Methane ($CH_4$)

(D) Ethane ($C_2H_6$)

32. Antiseptic action of $CHI_3$ is due to: [BSEB, 2010 A]

(A) Iodoform itself

(B) Liberation of free iodine

(C) Partial iodine and partial $CHI_3$

(D) None of these

33. Reduction of chloroform with Zinc and water gives: [BSEB, 2023 A]

(A) Acetylene

(B) Ethylene

(C) Ethane

(D) Methane

34. Commercial name of carbon tetrachloride ($CCl_4$) is: [BSEB, 2017 A]

(A) Pyrene

(B) Pyrrole

(C) Phosgene

(D) None of these

Topic 7: Functional Groups (Alcohols, Phenols, Amines)

35. Phenol heated with Zinc dust gives: [BSEB, 2022 A]

(A) Nitrobenzene

(B) Aniline

(C) Benzene

(D) Zinc phenoxide

36. Main product of reaction between ethyl chloride and $AgCN$ is: [BSEB, 2022 A]

(A) Ethyl cyanide

(B) Ethyl isocyanide

(C) Ethyl amine

(D) Ethyl nitrate

37. Monohalogen derivative reacts with alcoholic $KOH$ to give: [BSEB, 2022 A]

(A) Alkane

(B) Alkene

(C) Alkyne

(D) Alicyclic hydrocarbon

38. Vitamin C is: [BSEB, 2021 A]

(A) Ascorbic acid

(B) Nicotinic acid

(C) Citric acid

(D) Tartaric acid

39. Glucose is a: [BSEB, 2021 A]

(A) Triose

(B) Tetrose

(C) Pentose

(D) Hexose

40. Methyl amine can be prepared by: [BSEB, 2011 A]

(A) Wurtz reaction

(B) Hoffmann bromamide reaction

(C) Friedel-Crafts reaction

(D) Kolbe reaction

41. Heating aqueous solution of Benzene diazonium chloride gives: [BSEB, 2023 A]

(A) Benzene

(B) Benzyl alcohol

(C) Phenol

(D) Chlorobenzene

42. $OH^-$ and $RO^-$ are examples of: [BSEB]

(A) Electrophiles

(B) Nucleophiles

(C) Ambident

(D) Both (A) and (B)

43. Length of Carbon-Carbon single bond is: [BSEB, 2016 A]

(A) $1.54 \text{ \AA}$

(B) $1.34 \text{ \AA}$

(C) $1.20 \text{ \AA}$

(D) None of these

Topic 8: Syllabus Based Practice MCQs (44-155)

44. General formula of Alkyne is: [BSEB, 2015 A]

(A) $C_nH_{2n+2}$

(B) $C_nH_{2n}$

(C) $C_nH_{2n-2}$

(D) $C_nH_{2n-1}$

45. General formula of Alkane is: [BSEB, 2012 A]

(A) $C_nH_{2n}$

(B) $C_nH_{2n-2}$

(C) $C_nH_{2n+2}$

(D) None of these

46. Nature of $C-X$ bond in haloalkanes is: [BSEB, 2021 A]

(A) Ionic

(B) Covalent polar

(C) Neutral

(D) None of these

47. Which has the highest dipole moment? [BSEB, 2023 A]

(A) $CH_3Cl$

(B) $CH_2Cl_2$

(C) $CHCl_3$

(D) $CCl_4$

48. Compared to chlorobenzene, $Cl$ of ethyl chloride is: [BSEB, 2021 A]

(A) More reactive

(B) Less reactive

(C) Equally reactive

(D) Inert

49. Ethyl bromide reacts with $KCN$ to give: [BSEB, 2022 A]

(A) Ethyl cyanide

(B) Ethyl isocyanide

(C) Ethyl amine

(D) Ethyl alcohol

50. Which of the following is a primary halide? [BSEB, 2023 A]

(A) Isopropyl chloride

(B) Secondary butyl iodide

(C) Neo-hexyl chloride

(D) Tertiary butyl bromide

51. Oxidation state of Nickel in $Ni(CO)_4$ is: [BSEB, 2021 A]

(A) 0

(B) 2

(C) 3

(D) 4

52. Correct formula of Bleaching powder is: [BSEB, 2019 A]

(A) $Ca(OCl)Cl$

(B) $CaOCl_2$

(C) $Ca(ClO)_2$

(D) None of these

53. Hybridization of carbon in diamond is: [BSEB, 2016 A]

(A) $sp^3$

(B) $sp^2$

(C) $sp$

(D) $dsp^2$

54. Hybridization of carbon in ethene is: [BSEB, 2015 A]

(A) $sp^3$

(B) $sp^2$

(C) $sp$

(D) $sp^3d^2$

55. Good conductor of heat and electricity is: [BSEB, 2014 A]

(A) Diamond

(B) Graphite

(C) Charcoal

(D) Anthracite coke

56. Maximum percentage of carbon is in: [BSEB, 2014 A]

(A) Wood charcoal

(B) Coconut charcoal

(C) Graphite

(D) None of these

57. Purity of organic solids is characterized by: [BSEB, 2016 A]

(A) Boiling point

(B) Melting point

(C) Specific gravity

(D) None of these

58. $OH^-$ is a: [BSEB, 2021 A]

(A) Electrophile

(B) Nucleophile

(C) Lewis acid

(D) None of these

59. Reaction of ethyl bromide with dry $Ag_2O$ gives: [BSEB, 2024 A]

(A) Diethyl ether

(B) Ethanol

(C) Ethane

(D) Ethene

60. Lucas test is used to distinguish: [BSEB, 2022 A]

(A) Amines

(B) Alcohols

(C) Aldehydes

(D) Ketones

61. Main product of $CHCl_3 + O_2 \xrightarrow{\text{Light}} \dots + HCl$: [BSEB, 2021 A]

(A) $CO_2$

(B) $Cl_2$

(C) $COCl_2$

(D) $C$

62. Reduction of ketone with $LiAlH_4/H_2O$ gives: [BSEB, 2021 A]

(A) Primary alcohol

(B) Secondary alcohol

(C) Tertiary alcohol

(D) Alkane

63. Aniline and acetaldehyde react to form: [BSEB, 2018 A]

(A) Carbyl amine

(B) Nitrobenzene

(C) Imine

(D) Schiff’s base

64. Which is not a condensation polymer? [BSEB, 2022 A]

(A) Glyptal

(B) Nylon-6,6

(C) PTFE (Teflon)

(D) Dacron

65. Reduction of chloroform with Zinc/water gives: [BSEB, 2024 A]

(A) Acetylene

(B) Ethylene

(C) Ethane

(D) Methane

66. Alkyl halides are used for the synthesis of: [BSEB, 2023 A]

(A) Alkanes

(B) Alkenes

(C) Alcohols

(D) All of these

67. Alkenes show which type of reaction? [BSEB, 2016 A]

(A) Addition

(B) Substitution

(C) Both (A) and (B)

(D) None of these

68. Reactive species in chlorination of benzene is: [BSEB]

(A) $Cl^+$

(B) $Cl^-$

(C) $Cl_2$

(D) $Cl_2^-$

69. Oxygen atom in ether is: [BSEB, 2017 A]

(A) Highly reactive

(B) Comparatively inert

(C) Active

(D) Displaced

70. Order of rate of acidic hydrolysis is: [BSEB, 2018 A]

(I) $CH_2=CH-Cl$ (II) $CH_2=CH-CH_2-Cl$ (III) $CH_3-CH=CH-Cl$

(A) $I < II < III$

(B) $III < II < I$

(C) $II < I < III$

(D) $I < III < II$

71. Metal used in Fittig reaction is: [BSEB, 2021 A]

(A) $Mg$

(B) $Na$

(C) $Zn$

(D) $Cu$

72. $C_2H_5Br$ reacts with aqueous $KOH$ to give: [BSEB, 2024 A]

(A) $C_2H_5OH$

(B) $C_2H_4$

(C) $C_2H_2$

(D) $C_2H_6$

73. Heating chlorobenzene with $NaOH$ at $300^\circ C$ gives: [BSEB, 2023 A]

(A) Benzene

(B) Phenol

(C) Aniline

(D) Nitrobenzene

74. $S_N1$ reaction forms: [BSEB, 2018 A]

(A) Carbocation

(B) Carbanion

(C) Free radical

(D) Transition state

75. Boiling ethyl bromide with alcoholic caustic potash gives: [BSEB, 2026]

(A) Ethyl alcohol

(B) Ethylene

(C) Acetylene

(D) Ethane

76. When chloroform reacts with acetone, it forms: [BSEB, 2026]

(A) Chloral

(B) Mesitylene

(C) Chloretone

(D) Ethylene dichloride

77. Reduction of alkyl halide in Wurtz reaction is done by: [BSEB, 2026]

(A) Zn/HCl

(B) HI

(C) Zn/Cu couple

(D) Sodium (Na) in dry ether

78. $R-X + 2Na + X-R \xrightarrow{\text{Dry ether}} R-R + 2NaX$ is called: [BSEB, 2026]

(A) Wurtz reaction

(B) Fittig reaction

(C) Wurtz-Fittig reaction

(D) Kolbe reaction

79. Which of the following is optically active? [BSEB, 2021 A]

(A) 2-Chlorobutane

(B) 1-Chlorobutane

(C) 2-Chloropropane

(D) All of these

80. Alkyl halide reacts with $AgCN$ to give main product: [BSEB, 2022 A]

(A) Alkyl cyanide

(B) Alkyl isocyanide

(C) Alkyl amine

(D) Alkyl alcohol

81. Primary alkyl halides prefer which mechanism? [BSEB, 2024 A]

(A) $S_N1$

(B) $S_N2$

(C) Elimination

(D) Addition

82. Reaction of chlorobenzene with chloral in presence of conc. $H_2SO_4$ gives: [BSEB, 2021 A]

(A) BHC

(B) DDT

(C) Freon

(D) $COCl_2$

83. Alkyl magnesium halide ($RMgX$) is known as: [BSEB, 2017 A]

(A) Kolbe’s reagent

(B) Grignard reagent

(C) Lucas reagent

(D) Tollen’s reagent

84. Chlorination of methane in presence of sunlight finally gives: [BSEB, 2021 A]

(A) $CH_3Cl$

(B) $CH_2Cl_2$

(C) $CHCl_3$

(D) $CCl_4$

85. Lucas reagent is used for the identification of: [BSEB, 2013 A]

(A) Ether

(B) Alcohol

(C) Aldehyde

(D) Ketone

86. Chlorobenzene with Sodium in dry ether forms diphenyl. This is: [BSEB, 2012 A]

(A) Wurtz reaction

(B) Fittig reaction

(C) Wurtz-Fittig reaction

(D) Frankland reaction

87. Compound used as fire extinguisher is: [BSEB, 2019 A]

(A) $CCl_4$

(B) $CHCl_3$

(C) $CH_2Cl_2$

(D) $CH_3Cl$

88. Reaction of ethyl alcohol with $PCl_5$ gives: [BSEB, 2015 A]

(A) $C_2H_5Cl$

(B) $C_2H_6$

(C) $C_2H_4$

(D) $CH_3Cl$

89. Ethyl bromide reacts with silver cyanide ($AgCN$) to give: [BSEB, 2024 A]

(A) Ethyl cyanide

(B) Ethyl isocyanide

(C) Ethyl amine

(D) Ethyl alcohol

90. Which is used as an anesthetic? [BSEB, 2021 A]

(A) Chloroform

(B) Iodoform

(C) Acetylene

(D) Methane

91. Correct order of $C-X$ bond strength is: [BSEB, 2022 A]

(A) $CH_3F > CH_3Cl > CH_3Br > CH_3I$

(B) $CH_3I > CH_3Br > CH_3Cl > CH_3F$

(C) $CH_3Cl > CH_3F > CH_3Br > CH_3I$

(D) None of these

92. First product of primary alcohol oxidation is: [BSEB, 2018 A]

(A) Ketone

(B) Ester

(C) Aldehyde

(D) Carboxylic acid

93. Chloroform exposed to air and light forms: [BSEB, 2014 A]

(A) Phosgene

(B) Mustard gas

(C) Lewisite

(D) Tear gas

94. Which does not give Iodoform test? [BSEB, 2021 A]

(A) Methanol

(B) Ethanol

(C) Acetone

(D) Acetaldehyde

95. Conversion of alkyl halide to alkene is: [BSEB, 2023 A]

(A) Addition

(B) Elimination

(C) Substitution

(D) Rearrangement

96. Formula of Benzene is: [BSEB, 2021 A]

(A) $CH$

(B) $C_6H_5$

(C) $C_6H_6$

(D) $C_6H_{12}$

97. Nature of Phenol is: [BSEB, 2017 A]

(A) Acidic

(B) Basic

(C) Neutral

(D) None of these

98. Glycerol is a: [BSEB, 2020 A]

(A) Monohydric alcohol

(B) Dihydric alcohol

(C) Trihydric alcohol

(D) None of these

99. $CH_3I$ reacts with $Mg$ in dry ether to form: [BSEB, 2022 A]

(A) $CH_3MgI$

(B) $CH_4$

(C) $CH_3-CH_3$

(D) $CH_3OH$

100. Most reactive towards $S_N1$ is: [BSEB, 2019 A]

(A) Benzyl chloride

(B) Ethyl chloride

(C) Isopropyl chloride

(D) Tertiary butyl chloride

101. Dry distillation of calcium formate gives: [BSEB, 2021 A]

(A) $HCHO$

(B) $CH_3CHO$

(C) $CH_3COCH_3$

(D) $HCOOH$

102. Methyl magnesium iodide heated with water gives: [BSEB, 2018 A]

(A) Methane

(B) Ethane

(C) Methanol

(D) Ether

103. Hybridization of each carbon in benzene is: [BSEB, 2016 A]

(A) $sp$

(B) $sp^2$

(C) $sp^3$

(D) $sp^3d$

104. Formaldehyde heated with $NaOH$ gives: [BSEB, 2020 A]

(A) Acetone

(B) Methyl alcohol

(C) Ethyl formate

(D) Acetaldehyde

105. Which compound is soluble in water? [BSEB, 2021 A]

(A) $CHCl_3$

(B) $C_2H_6$

(C) $CH_3CH_2OH$

(D) $CCl_4$

106. Alkyl halide + sodium alkoxide $\rightarrow$ ether. This is: [BSEB, 2014 A]

(A) Williamson synthesis

(B) Kolbe’s reaction

(C) Fittig reaction

(D) None of these

107. Functional group of carboxylic acid is: [BSEB, 2021 A]

(A) $-CHO$

(B) $-CO-$

(C) $-COOH$

(D) $-OH$

108. Acid found in Vinegar is: [BSEB, 2017 A]

(A) $HCOOH$

(B) $CH_3COOH$

(C) $C_2H_5COOH$

(D) None of these

109. Ethyl acetate reacts with $CH_3MgBr$ to give: [BSEB, 2022 A]

(A) $2^\circ$ alcohol

(B) $3^\circ$ alcohol

(C) $1^\circ$ alcohol

(D) Aldehyde

110. Suitable solvent for $S_N2$ reaction is: [BSEB, 2024 A]

(A) Water

(B) Alcohol

(C) Polar aprotic solvent

(D) Benzene

111. Which compound is chiral? [BSEB, 2019 A]

(A) 1-Chlorobutane

(B) 2-Chlorobutane

(C) 1-Chloropropane

(D) 2-Chloropropane

112. Ethyl alcohol heated with conc. $H_2SO_4$ at $170^\circ C$ gives: [BSEB, 2021 A]

(A) $CH_3COOCH_3$

(B) $C_2H_6$

(C) $C_2H_4$

(D) $C_2H_2$

113. IUPAC name of vinyl chloride is: [BSEB, 2023 A]

(A) 1-Chloroethane

(B) Chloroethene

(C) 1-Chloropropane

(D) None of these

114. Yellow precipitate of Iodoform is obtained with: [BSEB, 2020 A]

(A) Methane

(B) Acetone + $I_2/NaOH$

(C) Benzene

(D) Chlorobenzene

115. Fastest reaction in Lucas test is given by: [BSEB, 2021 A]

(A) Primary alcohol

(B) Secondary alcohol

(C) Tertiary alcohol

(D) Methanol

116. General formula for Aldehydes and Ketones is: [BSEB, 2016 A]

(A) $C_nH_{2n}O$

(B) $C_nH_{2n+2}O$

(C) $C_nH_{2n-2}O$

(D) None of these

117. Cannizzaro reaction is shown by: [BSEB, 2021 A]

(A) $HCHO$

(B) $CH_3CHO$

(C) $CH_3COCH_3$

(D) $HCOOH$

118. Main product of Mustard oil reaction is: [BSEB, 2018 A]

(A) Alkyl isothiocyanate

(B) Alkyl cyanide

(C) Alkyl isocyanide

(D) None of these

119. Which is the strongest acid? [BSEB, 2022 A]

(A) $CH_3COOH$

(B) $ClCH_2COOH$

(C) $Cl_2CHCOOH$

(D) $Cl_3CCOOH$

120. Number of $\pi$ bonds in aniline is: [BSEB, 2021 A]

(A) 1

(B) 2

(C) 3

(D) 4

121. IUPAC name of $C_2H_5NH_2$ is: [BSEB, 2015 A]

(A) Ethanamine

(B) Methanamine

(C) Propanamine

(D) Ethyl amine

122. Amide is converted to amine by: [BSEB, 2024 A]

(A) Wurtz reaction

(B) Hoffmann Bromamide reaction

(C) Kolbe’s reaction

(D) None of these

123. Reduction of $CH_3CN$ gives: [BSEB, 2020 A]

(A) $CH_3NH_2$

(B) $C_2H_5NH_2$

(C) $CH_4$

(D) $NH_3$

124. Which is an artificial sweetening agent? [BSEB, 2021 A]

(A) Saccharin

(B) Aspartame

(C) Sodium cyclamate

(D) All of these

125. Nylon-6,6 is a: [BSEB, 2017 A]

(A) Polyamide

(B) Polyester

(C) Polystyrene

(D) Polythene

126. Natural rubber is a polymer of: [BSEB, 2021 A]

(A) Butadiene

(B) Ethene

(C) Styrene

(D) Isoprene

127. Ethyl alcohol heated with which reagent gives ethyl bromide? [BSEB, 2026]

(A) $Br_2$

(B) $KBr$ + conc. $H_2SO_4$

(C) $NH_4Br$

(D) None of these

128. $Cl$ atom of chlorobenzene is: [BSEB, 2022 A]

(A) Highly reactive

(B) Less reactive than ethyl chloride

(C) Equally reactive

(D) None of these

129. Optical activity is shown by: [BSEB, 2021 A]

(A) 2-Chlorobutane

(B) 1-Chlorobutane

(C) 2-Chloropropane

(D) Methane

130. Aldol condensation involves: [BSEB, 2018 A]

(A) $HCHO$

(B) $CH_3CHO$

(C) $C_6H_5CHO$

(D) $Cl_3CCHO$

131. Benzene sulfonic acid fused with $NaOH$ gives: [BSEB, 2020 A]

(A) Benzene

(B) Phenol

(C) Aniline

(D) Chlorobenzene

132. Product of $2C_2H_5Cl + 2Na$ in dry ether is: [BSEB, 2026]

(A) $C_2H_6$

(B) $C_3H_8$

(C) $C_4H_{10}$

(D) $C_2H_4$

133. Formaldehyde + Grignard reagent gives: [BSEB, 2021 A]

(A) $1^\circ$ alcohol

(B) $2^\circ$ alcohol

(C) $3^\circ$ alcohol

(D) Ketone

134. Ethyl iodide heated with alcoholic $KOH$ gives: [BSEB, 2024 A]

(A) Ethanol

(B) Ethene

(C) Ethyne

(D) Ethane

135. Biomolecule which is a source of energy for the body: [BSEB, 2021 A]

(A) Vitamin

(B) Protein

(C) Carbohydrate

(D) Fat

136. Metal present in Vitamin $B_{12}$ is: [BSEB, 2019 A]

(A) $Fe$

(B) $Zn$

(C) $Mg$

(D) $Co$

137. Number of chiral carbons in glucose: [BSEB, 2021 A]

(A) 2

(B) 3

(C) 4

(D) 5

138. Complete hydrolysis of starch gives: [BSEB, 2020 A]

(A) Glucose

(B) Fructose

(C) Sucrose

(D) Lactose

139. Main product of $C_2H_5Br \xrightarrow{\text{AgNO}_2} \dots$: [BSEB, 2022 A]

(A) Nitroethane

(B) Ethyl nitrite

(C) Ethyl amine

(D) Ethyl alcohol

140. In $S_N2$ reaction, attack occurs from: [BSEB, 2024 A]

(A) Front

(B) Backside

(C) Any direction

(D) None

141. IUPAC name of $CHCl_3$ is: [BSEB, 2021 A]

(A) Chloroform

(B) Trichloromethane

(C) Dichloromethane

(D) Tetrachloromethane

142. $1\%$ ethyl alcohol is added to chloroform to: [BSEB, 2017 A]

(A) Prevent reduction

(B) Eliminate toxic effect of phosgene

(C) Increase activity

(D) None

143. Functional group of Aldehyde is: [BSEB, 2021 A]

(A) $-CHO$

(B) $-OH$

(C) $-COOH$

(D) $>C=O$

144. Primary amine is identified by: [BSEB, 2018 A]

(A) $HCl$

(B) $CHCl_3 + KOH$

(C) $NaOH$

(D) None

145. Ascorbic acid is a: [BSEB, 2021 A]

(A) Vitamin

(B) Enzyme

(C) Protein

(D) Amino acid

146. Purine base found in RNA is: [BSEB, 2020 A]

(A) Guanine

(B) Uracil

(C) Thymine

(D) None

147. Polythene is a polymer of: [BSEB, 2021 A]

(A) Ethene

(B) Propene

(C) Vinyl chloride

(D) Styrene

148. Monomer of Teflon is: [BSEB, 2019 A]

(A) $F_2C=CF_2$

(B) $CH_2=CH-Cl$

(C) $CH_2=CH-CN$

(D) $CH_2=CH_2$

149. In Buna-S, ‘S’ stands for: [BSEB, 2021 A]

(A) Sodium

(B) Sulfur

(C) Styrene

(D) Sucrose

150. Bakelite is a polymer of: [BSEB, 2017 A]

(A) Phenol and Formaldehyde

(B) Ethylene

(C) Vinyl chloride

(D) Adipic acid

151. Chloramphenicol is used in: [BSEB, 2021 A]

(A) Malaria

(B) Typhoid

(C) Cholera

(D) None

152. Paracetamol is a: [BSEB, 2020 A]

(A) Analgesic

(B) Antibiotic

(C) Antihistamine

(D) None

153. Dettol is used as: [BSEB, 2021 A]

(A) Disinfectant

(B) Antiseptic

(C) Antimalarial

(D) None

154. Most reactive halogen is: [BSEB, 2016 A]

(A) $F_2$

(B) $Cl_2$

(C) $Br_2$

(D) $I_2$

155. $PCl_5$ is an: [BSEB, 2021 A]

(A) Oxidizing agent

(B) Reducing agent

(C) Both

(D) None