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Catalytic Hydrogenation

Which of the ...

Question

Which of the following will have least hindered rotation about carbon-carbon bond?

A

Ethane

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B

Ethylene

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C

Acetylene

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D

Hexachloro ethane

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Solution

The correct option is D Ethane
Hexachloroethane has less rotation than ethane because of greater size of chlorine than hydrogen.

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