Question

The correct order of $C-O$ bond length in the following compounds is?

• A. a > b = c > d
• B. b > a = c > d
• C. b > a > c > d
• D. c > a > d > b

Answer 1

Answer: (B)

b > a = c > d

$\left(a\right)$ and $\left(c\right)$ are equal bond length.

High resonance$\leftarrow \left(b\right)>a=c>\left(d\right)\to$ No resonance