Terminal alkene can be prepared by which of the following reagents?

butan - 2 - ol

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2- methylpropan - 1 - ol

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2 - methylpropan - 2 - ol

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none of the above

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Solution

The correct option is B 2- methylpropan - 1 - ol
Dehydration of alcohol takes place to form alkenes. Therefore 2-methylprop-1-ene can be prepared from ; 2-methylpropan-1-ol as:
$C H_{3} - C H (C H_{3}) - C H_{2} - O H Δ - - \to a c i d C H_{3} - (C H_{3}) C = C H_{2} + H_{2} O$

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