1.

The index of hydrogen deficiency (IHD) of benzene isA. 4B. 6C. 2D. 3

Answer» Correct Answer - 4
Molecular formula of benzene is `C_(6)H_(6)`
`IHD=sum(n(v-2))/(2)+1=(6(4-2)+6(1-2))/(2)+1`
`=3+1=4`
IHD for banzene is 4 due, to three `pi` bonds and one cyclic structure.


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