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  4. The alkene formed as a major product in the above elimination reaction is :

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Q. The alkene formed as a major product in the above elimination reaction is :Chemistry Question Image

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Solution:

There are four p-hydrogens, in this quaternary ammonium salt.
On heating quaternary ammonium salt gives Hofmann elimination (abstraction of most acidic hydrogen which is $\beta^{1'}$)
Hence major product is $CH_{2}=CH_{2}$. (Least substituted alkene)

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