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  4. 2-bromopentane is heated with potassium hydroxide in ethanol. The major product obtained is

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Q. 2-bromopentane is heated with potassium hydroxide in ethanol. The major product obtained is

Haloalkanes and Haloarenes

Solution:

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When alkyl halide reacts with ale. KOH then it favours elimination reaction (Dehydrohalogenation). Since, trans pentene-2 is more symmetrical than cis isomers. Hence, it is main product.
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