Statement - I : Aldehyde are more reactive than ketone.
Statement - II : Nucleophilic addition reaction in carbonyl compound $\propto \frac{1}{\text{ Steric hindrance }}$and $\propto$positive charge at carbon of carbonyl group.

Aldehydes are generally more reactive than ketones innucleophilic addition reactions due to steric and electronic reasons. Sterically, the presence of two relatively large substituents in ketones hinders the approach of nucleophile to carbonyl carbon than in aldehydes having only one such substituent. Electronically, aldehydes are more reactive than ketones because two alkyl groups reduce the electrophilicity of the carbonyl carbon more effectively than in former.