JEE Main 2021ChemistryAldehydes and KetonesEasyMCQ

JEE Main 2021 — Aldehydes and Ketones Question with Solution

JEE Main 2021 (01 Sep Shift 2)

Question

Experimentally reducing a functional group cannot be done by which one of the following reagents ?

Choose an option

Show full solutionCorrect option: D
Correct answer
DNa/H2

Step-by-step explanation

Sodium reacts with Hydrogen to form sodium hydride.

2Na + H2 →2NaH

So Na/H2 cannot be used for reduction of functional groups.

All other reagents are used as reducing agent.

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Aldehydes and Ketones chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2021, covering the Aldehydes and Ketones chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.