Question

Which of the following will give a yellow or orange ppt. with 2,4-DNP?

1. Propanal
2. Propanone
3. Propanoic acid

Options

• (i) and (ii)

• (ii) and (iii)

• (i) and (iii)

• (i), (ii) and (iii)

Answer 1

(i) and (ii)

Explanation:

Aldehydes and ketones react with 2,4 dinitrophenylhydrazine to give a yellow/orange ppt of 2,4 dintirophenylhydrazone.