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Question

Elimination reaction of 2-bromopentane to form pent-2-ene is:
(A) β- elimination reaction
(B) Follows zaitsev's rule
(C) Dehydrohalogenation reaction
(D) Dehydration reaction

A
(A), (B), (C)
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B
(A), (C), (D)
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C
(B), (C), (D)
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D
(A), (B), (D)
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Solution

The correct option is A (A), (B), (C)
5CH34CH23CH2C|BrH1CH3β elimination−−−−−−−HBr5CH34CH23CH=2CH1CH3

(A) βhydrogen is removed so it is a β elimination reaction.
(B) Major product is most substituted alkene which is formed by Zaitsev's rule.
(C) In this elimination rection hydrogen halide (HBr) is getting removed, hence it is a dehydrohalogenation reaction.


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