Question

Match the reagents in List - I with products obtained from their carbonyl compounds in List - II.

Codes:

• A. a – ii, b – iii, c – iv, d – i
• B. a – i, b – ii, c – iii, d – iv
• C. a – iii, b – ii, c – i, d – iv
• D. a – i, b – iii, c – ii, d – iv

Hint:

Create a mental map or a quick reference sheet for the reactions of carbonyl compounds with nitrogen nucleophiles (ammonia derivatives), alcohols, and HCN. Recognizing the reagent-product pair is a key skill for organic chemistry questions.

Answer 1

The Correct Option is A

The question involves matching reagents in List-I with the products obtained from their carbonyl compounds in List-II. Let's examine each reagent and the types of reactions they typically undergo:

1. Reagent: NH₂OH (Hydroxylamine)
   • This reagent typically reacts with aldehydes or ketones to form oximes.
2. Reagent: R-NH₂ (Primary amine)
   • Primary amines react with carbonyl compounds to form Schiff bases.
3. Reagent: R-OH (Alcohol)
   • Alcohols react with aldehydes or ketones to form hemiacetals, which can further react to form acetals.
4. Reagent: H-C≡N (Hydrogen cyanide)
   • Hydrogen cyanide reacts with carbonyl compounds to form cyanohydrins. 

Based on the above reactions, we can match the reagents with their products:

List - I	List - II
(a) NH2OH	(ii) Oxime
(b) R-NH2	(iii) Schiff base
(c) R-OH	(iv) Acetal
(d) H-C≡N	(i) Cyanohydrin

Therefore, the correct answer is: a – ii, b – iii, c – iv, d – i.