Question

The $C-H$ bond distance is the longest in :

• A. $C_2{H}_2$
• B. $C_2{H}_4$
• C. $C_2{H}_6$
• D. $C_2{H}_{2}B{r}_2$

Answer 1

The correct option is C $C_2{H}_6$

$C_2{H}_6$ is a saturated hydrocarbon and its carbon is $s{p}^3$ hybridised. Hence it is least electronegative among alkanes, alkenes and alkynes. Hence, the $C-H$ bond length will be maximum in $C_2{H}_6$.