Arrange the following carbonyl compounds in increasing order of their reactivity nucleophlic addtion reactino.

Options

A. Butanone `lt` propanae `lt` propanal `lt` ethanal
B. Butanone `lt` propanal `lt` propanone `lt` ethanal
C. Butanone `lt` ethanal `lt` propanone `lt` propanal
D. Butanone `lt` ethanal `lt` propanal `lt` propanone

Answer

A

Explanation

In ethernal `to` proplan `to` propanone `to` butanone, then electron density on the carbon atom of the carbonly group increases due to the increases of +I effect of the alkyl group. Thus, the attack by the nucleophile becomes slower and solwer. The reactivity increases in the reverse order.
butanone `lt` propane `lt` propanal `lt` ethanla.