Question

Which reagent is capable of giving test both of Aldehyde and ketones

• A. Tollen reagent
• B. Fehling solution
• C. 2, 4 dinitrophenylhydrazine
• D. Shift reagent

Answer 1

Answer: (C)

2, 4 dinitrophenylhydrazine

Answer 2

Both aldehydes and ketone reacts with $2,\, 4\, DNP$ to form yellow, orange or red $ppt$. of $2,\,4$-dinitrophenylhydrazones.

with Fehling solution, Shiff??s reagent and Tollen reagent only aldehyde reacts. These are distinguishing test for aldehyde and ketones.