Question

Decreasing order of C-C bond length is
(I)`C_2H_6`
(II)`C_2H_2`
(III)`C_6H_6`
(IV)`C_2H_6`
A. IV gt III gt I gt II
B. I gt II gtIV gt III
C. II gt I gt IV gt III
D. IV gt I gt III gt II

Answer 1

Correct Answer - A
Bond length `prop 1/"Bond order"`
Bond order =`"Bonding -antibonding electron"/2`
Bond order is highest for `C_2H_6` so it has minimum bond strength