1.

Which of the following are cumulative dienes?

Answer»

`CH_3 - CH = C = CH-CH_2`
`CH_2 = CH - CH = CH_2`
`CH_2 = CH - CH_2CH = CH_2`
`CH_3CH_2CH= C=CH-CH_3`

Solution :In cumulative DIENES, there is at least one carbon atom JOINED to both the NEIGHBOURING carbon ATOMS by double BONDS, i.e., they contain the group


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