300+ TOP MCQs on Haloalkanes and Haloarenes and Answers

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Haloalkanes and Haloarenes Multiple Choice Questions

MCQs on Haloalkanes and Haloarenes :

1. Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
(A) Benzyl Chloride
(B) Ethyl chloride
(C) Chlorobenzene
(D) Isopropyl chloride

Answer

Answer: (a)

2. The increasing order of nucleophilicity would be?
(A) Cl < Br < I
(B) I < Cl < Br
(C) Br < Cl– < F
(D) I < Br < Cl

Answer

Answer: (a)

3. Which of the following is most reactive towards SN1 reaction?
(A) C6H5C(CH3)C6H5Br
(B) C8H5CH2Br
(C) C6H5CH(C6H5)Br
(D) C6H5CH(CH3)Br

Answer

Answer: (a)

4. CH3CH2CH2Br + NaCN → CH3CH2CH2CN + NaBr, will be fastest in
(A) ethanol
(B) methanol
(C) N, N-dimethylformamide
(D) Water

Answer

Answer: (c)

5. A Grignard reagent may be made by reacting magnesium with
(A) Methyl amine
(B) Diethyl ether
(C) Ethyl iodide
(D) Ethyl alcohol

Answer

Answer: (c)

6. C-Cl bond of chlorobenzene in comparison to C-Cl bond in methyl chloride is
(A) Longer and weaker
(B) Shorter and weaker
(C) Shorter and stronger
(D) Longer and stronger

Answer

Answer: (c)

7. A solution of (+) 2-chloro-2-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of
(A) carbanion
(B) carbene
(C) free radical
(D) carbocation

Answer

Answer: (d)

8. The decreasing order of boiling points of alkyl halides is
(A) RF > RCl > RBr > RI
(B) RBr > RCl > RCl > RF
(C) RI > RBr > RCl > RF
(D) RCl > RF > RI > RBr

Answer

Answer: (c)

9. Phosgene is commonly known as
(A) thionyl chloride
(B) carbonyl chloride
(C) carbon dioxide and phosphine
(D) phosphoryl chloride

Answer

Answer: (b)

10. The reaction of tert butyl bromide with sodium methoxide produces mainly
(A) isobutane
(B) isobutylene
(C) tert-butyl methyl ether
(D) sodium tert butoxide

Answer

Answer: (b)

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