Question
The correct order of increasing bond length of $$C - H,\,C - O,\,C - C$$ and $$C = C$$ is
A.
$$C - C < C = C < C - O < C - H$$
B.
$$C - O < C - H < C - C < C = C$$
C.
$$C - H < C - O < C - C < C = C$$
D.
$$C - H < C = C < C - O < C - C$$
Answer :
$$C - H < C = C < C - O < C - C$$
Solution :
$$\eqalign{
& C - H:0.109\,nm \cr
& C = C:\,0.134\,nm \cr
& C - O:\,0.143\,nm \cr
& C - C:\,0.154\,nm \cr
& \therefore \,\,{\text{Bond length order is}} \cr
& C - H < C = C < C - O < C - C \cr} $$