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Which of the following reactions is not ...

Which of the following reactions is not exothermic ?

A

`CH_3 - Cl + CH_3 – CH_2 rarr CH_4 + CH_3 – CH_2-Cl`

B

`CH_3 - Cl + (CH_3)_3 C-H rarr CH_4 + (CH_3)_3 – C-Cl`

C

`CH_3 - Cl + CH_2= CH-CH_3 rarr CH_4 + CH_2=CH-CH_2-Cl`

D

`CH_3 - Cl + CH_2=CH_2 rarr CH_4+CH_2=CHCl`

Text Solution

Verified by Experts

The correct Answer is:
D
`underset(" strong bond")underset(" "uarr)(H_2C=CH-H)rarrunderset("unstable vinyl radical")(H_2C=overset(.)(CH)`
therefore it is endothermic.
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