In which of the following species, all the three types of hybrid carbons are present?

Options

A. `CH_2=C=CH_2`
B. `CH_3-CH=CH-CH_2^+`
C. `CH_3-C=C-CH_2^+`
D. `CH_3-CH=CH_2^-`

Answer

C

Explanation

If there is four `sigma` bonds hybridisation is `sp^3`. If three `sigma` bonds hybridisation is `sp^2` and if two `sigma` bonds hybridisation is sp.
`(a) underset(sp^2) CH_2=underset(sp) C=underset(sp^2) CH_2`
(b) `underset(sp^3) CH_3-underset(sp^2) CH=underset(sp^2) CH-underset(sp^2) CH_2^+`
`(c ) underset(sp^3) CH_3-underset(sp) C-=underset(sp) C-underset(sp^2) CH_2^+`
(d) `underset(sp^3) CH_3-underset(sp^2) CH=underset(sp^2) CH-underset(sp^3) CH_2^-`
`(e)underset(sp^2) CH=underset(sp^2) CH-underset(sp^2) CH=underset(sp^2) CH_2`
Hence, in `CH_3-C-=C-CH_2^+` all the three types of hybrid carbons are present.