Chapter-10 Haloalkanes and Haloarenes MCQs
Q 41.: What is DDT among the following ?
(A) A fertilizer
(B) Non-biodegradable pollutant
(C) Biodegradable pollutant
(D) Greenhouse gas
Option – B
Q 42.: When you heat chloroform with silver powder _____ is formed
(A) Methane
(B) Ethane
(C) Ethene
(D) Ethyne
Option – D
Q 43.: Iodo-alkane is obtained by the reaction of bromo-alkane or chloro-alkane with solution of NaI prepared in dry acetone. This reaction is known as ____
(A) Finkelstein reaction
(B) Swarts Reaction
(C) Gattermann reaction
(D) Balz-schiemann reaction
Option – A
Q 44.: Which branched chain isomer of the hydrocarbon with molecular mass 72 u gives only one isomer of mono substituted alkyl halide ?
(A) Neopentane
(B) Isohexane
(C) Neohexane
(D) Tertiary butyl chloride
Option – A
Q 45.: In dihalide if both halogen are combined with adjacent carbon atom then such halide are known as ___
(A) Aryl halide
(B) Geminal halide
(C) Vicinal halide
(D) All of these
Option – C
Q 46.: What are nucleophilic reagents according to Lewis theory ?
(A) Lewis Acid
(B) Lewis Base
(C) Positive ion
(D) Neutral Molecules
Option – B
Q 47.: Which of the following compound is obtained by Sandmeyer reaction ?
(A) Benzyl chloride
(B) Aniline
(C) Chlorobenzene
(D) Phenol
Option – C
Q 48.: If a molecule has ‘n’ number of different chiral centres, then, how many possible stereoisomers will it have ?
(A) 2n
(B) n2
(C) 2n+1
(D) 2n–1
Option – A
Q 49.: Which of the following is a free radical Halogenation reaction ?
(A) Benzene converted to bromobenzene
(B) Phenol converted to chlorobenzene
(C) Benzene diazonium chloride converted to chlorobenzene
(D) Propane converted to 1-chloropropane and 2-chloropropane
Option – D
Q 50.: A molecule having 3 different chiral carbon atoms, how many stereo-isomers it will have ?
(A) Three
(B) Six
(C) Eight
(D) Nine
Option – C
Q 51.: Which of the following is obtained by hydrolysis of ethyl-magnesium bromide ?
(A) CH3-CH3
(B) CH3-CH=CH2
(C) CH4
(D) CH2=CH2
Option – A
Q 52.: Which two reagents are required to produce D.D.T. ?
(A) Chloral and chlorobenzene
(B) Chloroform and chlorobenzene
(C) CCl4 and chlorobenzene
(D) Chloral chloroform
Option – A
Q 53.: How many chiral carbon atoms are there in 1-chloro-2, 5-dimethyl cyclohexane ?
(A) Zero
(B) One
(C) Two
(D) Three
Option – D
Q 54.: Which of the following compounds causes red rashes, if it comes in direct contact with skin ?
(A) CCl4
(B) CHCl3
(C) CH2Cl2
(D) CH3Cl
Option – C
Q 55.: What is the correct relation for SN2 reaction ?
(A) rate = k [R]2
(B) rate = k [Nu:]2
(C) rate = k [R] [Nu:]
(D) rate = k [R]2 [Nu:]2
Option – C