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Among the given molecule, what is the nu...

Among the given molecule, what is the number of molecules which show resonance?
`CH_(2)=CH-CH_(2)-CHO`
`CH_(2)=CH-CH=O`
`CH_(3)COCH_(3)`
`CH_(2)=CH-CH_(2)-CH=CH_(2)`

A

`CH_(2)=CH-CH_(2)-CHO`

B

`CH_(2)=CH-CH=O`

C

`CH_(3)COCH_(3)`

D

`CH_(2)=CH-CH_(2)-CH=CH_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`CH_(2)=CH-CH=overset(+)underset(cdotcdot)O:harroverset(+)CH_(2)-CH=CH-overset(cdotcdot)underset(cdotcdot)O:^(-)`
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