Question

Which is more electronegative: a sp hybridized carbon or a sp${}^{\text{2}}$ hybridized carbon and why?

Answer 1

$sp$ hybridized carbon is more electronegative than a $s{p}^2$ hybridized carbon because the more is the s-character.

The more the hybrid orbital is close to the nucleus and hence the more is the electro-negativity.

In $sp$ hybrid orbital, the hybrid orbital is more close to the nucleus than $s{p}^2$ hybrid orbital. This is due to the more s-character.

Thus, sp hybridized carbon is more electronegative.