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The dehydrohalogenation of neopentyl bromide with alco. KOH mainly gives 

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The dehydrohalogenation of neopentyl bromide with alco. KOH mainly gives 

(a) 2-methyl 1-butene 

(b) 2-methyl 2-butene 

(c) 2,2-dimethyl-1-butene 

(d) 2-butene

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(b) 2-methyl 2-butene 

In this reaction, 1° carbonium ion is formed which rearranges to form 3° carbonium ion. Hence, 2-methyl-2-butene is formed as the main product.

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