Question

Secondary nitroalkanes can be converted into ketones by using Y. Identify Y from following

• A. Aqueous HCl
• B. Aqueous NaOH
• C. KMnO\(_4\)
• D. CO

Hint:

Nef reaction converts nitroalkanes into aldehydes/ketones using acidic hydrolysis.

Answer 1

The Correct Option is A

Step 1: Recall reaction of secondary nitroalkanes.
Secondary nitroalkanes (\(R_2CHNO_2\)) upon hydrolysis in acidic medium form ketones.
This is known as Nef reaction.
Step 2: Nef reaction condition.
The nitroalkane is first converted into nitronate salt in base, then acid hydrolysis gives carbonyl compound.
But the final conversion to ketone needs aqueous acid (HCl).
Step 3: Conclusion.
Thus reagent Y is aqueous HCl.
Final Answer:
\[ \boxed{\text{(A) Aqueous HCl}} \]