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In how many of the following the concept...

In how many of the following the concept of resonance can be observed
`CH_(2)=CH-Cl, CH_(3)-O-overset(+)(C)H-CH_(3)`
`CH_(3)-O-CH_(2)overset(+)(C)H, CH_(3)-NH-CH_(2)-CH-CH_(3)`
`CH_(3)-CH=CH-NH_(2), CH_(3)-CH_(2)=CH_NH-CH_(3)`

Text Solution

Verified by Experts

The correct Answer is:
4
`CH_2 = CH - underset(* *)overset(* *)(Cl :) CH_3 - underset(* *)overset(* *)(O) - overset(+)CH - CH_3 , CH_3 - CH = CH - overset(*)(N)overset(*)(H)-CH_3`
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