In carbonyl compounds, the carbonyl grou...

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 statements regarding carbonyl compounds is not correct?

The addition reactions occurring across the `gtC = O` bond are of electrophilic type.

The addition reactions occurring across the `gtC=O` bond are of nucleophilic type.

Aldehydes undergo addition reactions more readily than ketones.

The addition reactions shown by `gtC = O` group are catalysed by acids.

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The correct Answer is:

The addition across `gtC = O` bond is nucleophilic in nature.

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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?

The carbon atom of the carbonyl group is `sp^(2)`-hybridised

The `C = O` bond length is longer than `C = C` bond length.

The dipole moments of aldehydes and ketones lie in the range `2*3` to `2*8 D`.

The portion of the molecule immediately surrounding the carbonyl group is planar.

Presence of carbon-oxygen double bond.

Resonance in carbonyl group.

Ability of oxygen to accommodate negative charge.

All are equally important.

`H_(2)C = O gt RCHO gt ArCHO gt R_(2)C =O gt Ar_(2)C =O`

`ArCHO gt Ar_(2)C =O gt RCHO gt R_(2)C = O gt H_(2)C =O`

`Ar_(2)C = O gt R_(2)C =O gt ArCHO gt RCHO gt H_(2)C =O`

`H_(2)C = O gt R_(2)C = O gt Ar_(2)C = O gt RCHO gt ArCHO`