Question

The reagent that gives an orange precipitate with acetaldehyde is:

• A. $$N{H}_{2}OH$$
• B. $$NaHS{O}_3$$
• C. $$I_2$$
• D. $$2,4-DNP$$

Answer 1

The correct option is D $$2,4-DNP$$

2,4-dinitrophenylhydrazine (2,4-DNP) gives orange precipitate with acetaldehyde. This is used for identification of ​aldehydes and ketones​.
Hence, option (d) is correct.