CBSE Class 12 Haloalkanes and Haloarenes with Answers Multiple Choice Questions with Answers. MCQ Questions Class 12 Haloalkanes and Haloarenes with Answers with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Haloalkanes and Haloarenes with Answers MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Haloalkanes and Haloarenes with Answers - Set - 3
Question 1:
The alkyl halide is converted into an alcohol by
(a) elimination
(b) dehydrohalogenation
(c) addition
(d) substitution
Correct Answer – (D)
Question 2:
Which of the following compounds is not chiral?
(a) CH3CHDCH2Cl
(b) CH3CH2CHDCl
(c) DCH2CH2CH2Cl
(d) CH3CHClCH2D
Correct Answer – (C)
Question 3:
An organic compound A(C4H9Cl) on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative then, A is
(a) t-butyl chloride
(b) s-butyl chloride
(c) iso-butyl chloride
(d) n-butyl chloride
Correct Answer – (A)
Question 4:
Reactivity order of halides for dehydrohalogenation is
(a) R – F > R – Cl > R – Br > R – I
(b) R – I > R – Br > R – Cl > R – F
(c) R – I > R – Cl > R – Br > R – F
(d) R – F > R – I > R – Br > R – Cl
Correct Answer – (B)
Question 5:
Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
(a) Ethyl chloride
(b) Isopropyl chloride
(c) Chlorobenzene
(d) Benzyl chloride
Correct Answer – (D)
MCQ Questions Class 12 Haloalkanes and Haloarenes With Answers
Question 6:
Replacement of Cl of chlorobenzene to give phenol requires drastic conditions. But chlorine of 2,4-dinitrochlorobenzene is readily replaced because
(a) NO2 donates e– at meta position
(b) NO2 withdraws e– from ortho/para positions
(c) NO2 makes ring electron rich at ortho and para
(d) NO2 withdraws e– from meta position
Correct Answer – (B)
Question 7:
A compound of molecular formula C7H16 shows optical isomerism, compound will be
(a) 2,3-dimethylpentane
(b) 2,2-dimethylbutane
(c) 2-methylhexane
(d) none of these
Correct Answer – (A)
Question 8:
Obtained by chlorination of n-butane will be
(a) meso form
(b) racemic mixture
(c) d-form
(d) l-form.
Correct Answer – (B)
Question 9:
Which of the following is least reactive in a nucleophilic substitution reaction?
(a) (CH3)3C – Cl
(b) CH2 = CHCl
(c) CH3CH2Cl
(d) CH2 = CHCH2Cl
Correct Answer – (B)
Question 10:
Which of the following is not chiral?
(a) 2-Hydroxypropanoic acid
(b) 2-Butanol
(c) 2,3-Dibromopentane
(d) 3-Bromopentane
Correct Answer – (D)
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