Which of the following statements are not correct?

Options

A. All `C-O` bonds in `CO_(3)^(2-)` are equal but not in `H_(2)CO_(3)`
B. All `C-O` bonds in `HCO_(2)^(-)` are equal but not in `HCO_(2)H`
C. `C-O` bond length in `HCO_(2)^(-)` is longer than `C-O` bond length in `CO_(3)^(2-)`
D. `C-O` bond length in `HCO_(2)^(-) and C-O` bond length in `CO_(3)^(2-)` are equal

Answer

C, D

Explanation

`B.O=(2+1+1)/(3)=(4)/(3)=1.33`
`C-O` bond length in `HCOO^(-)` is less than `C-O` bond length in `CO_(3)^(2-)`