Hybridisation of the underlined atom is affected when:

C - - H_{3} C O O H

is decarboxylated

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C H_{3} C - - H_{2} O H

is dehydrated

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C H_{3} C - - H_{3}

is chlorinated

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{C - -}_{6} H_{6}

is nitrated

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Solution

The correct option is B $C H_{3} C - - H_{2} O H$ is dehydrated
Hybridisation of underlined atom of ethanol ( $C H_{3} C - - H_{2} O H$ ) is affected by dehydration.
When ethanol undergo dehydration to form Ethylene $(C H_{2} = C H_{2})$ . So hybridisation changes from $S P^{3}$ to $S P^{2}$ .
$C H_{3} C - - H_{2} O H d e h y r a t i o n - ----- \to C H_{2} = C - - H_{2}$
Ethanol Ethylene
So answer is B.

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Similar questions

What are hybridisation states of each carbon atom in the following compounds?

$C H_{2} = C = O$

$C H_{3} C H = C H_{2}$

$(C H_{3})_{2} C O$

$C H_{2} = C H C N$ ,

$C_{6} H_{6}$

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