In carbonyl compounds, the carbonyl group is polar as well as in `sp^(2)` hybridisation state. As a result, these compounds are highly reactive in nature and take part in the addition reactions. The mechanism of these reactions is nucleophilic in nature and is catalyseed in the weakly acidic medium. The extent of nycleophilic addition is influenced by two factors. These are steric effect of the groups attached to the carbonyl carbon atom. Both tend to decrease the reactivity of these compounds in the nuclephilic addition reactions.
Which of the following statement is not true for carbonyl `(gtC=O)` group?

Options

A. The carbon atom of the carbonyl group is `sp^(2)`-hybridised
B. The `C = O` bond length is longer than `C = C` bond length.
C. The dipole moments of aldehydes and ketones lie in the range `2*3` to `2*8 D`.
D. The portion of the molecule immediately surrounding the carbonyl group is planar.

Answer

B

Explanation

`gtC = O` bond length `(123 "pm")` is shorter than `gtC = Clt` bond lengsth (134 pm).