JEE Chemistry 2026 Question with Solution

Given: A matching question between reagents in List-I and names of reactions involving carbonyl compounds in List-II.

Find: The correct correspondence between A, B, C, D and I, II, III, IV.

Step 1: Identify each reagent and reaction.

• $\mathrm{NH_2-NH_2,\ KOH}$ is used in Wolff–Kishner reduction.
• $\mathrm{Ag(NH_3)_2OH}$ is Tollen's reagent.
• $\mathrm{Aq.\ CuSO_4,\ sodium\ potassium\ tartrate,\ KOH}$ is used in Fehling's test.
• $\mathrm{Zn-Hg,\ HCl}$ is used in Clemmensen reduction.

Step 2: Match correctly.

$$\text{A–III, B–I, C–IV, D–II}$$

Therefore, the correct option is D.

Given: The reagents are listed and each must be matched with a named carbonyl reaction.

Find: Which option gives the correct matching.

The key identifications are:

1. $\mathrm{NH_2-NH_2,\ KOH}$ works in basic medium, so it corresponds to Wolff–Kishner reduction.
2. $\mathrm{Ag(NH_3)_2OH}$ is Tollen's reagent, used in Tollen's test.
3. $\mathrm{Aq.\ CuSO_4,\ sodium\ potassium\ tartrate,\ KOH}$ corresponds to Fehling's test.
4. $\mathrm{Zn-Hg,\ HCl}$ works in acidic medium, so it corresponds to Clemmensen reduction.

Thus the final matching is:

$$\text{A–III, B–I, C–IV, D–II}$$

Hence, the correct option is D.