KCET2026ChemistryAldehydes and Ketones
Match the reagents in List-I with products obtained from their carbonyl compounds in List-II. List-I List-II (a) NH ₂ OH (i) Cyanohydrin (b) R- NH ₂ (ii) Oxime (c) R- OH (iii) Schiff base (d) H-C N (iv) Acetal
Options
- Aa-ii, b-iii, c-iv, d-i
- Ba-i, b-ii, c-iii, d-iv
- Ca-iii, b-ii, c-i, d-iv
- Da-i, b-iii, c-ii, d-iv
Correct answer
A. a-ii, b-iii, c-iv, d-i
Step-by-step solution
Reaction of carbonyl compounds with various reagents yields specific products: (a) Reaction with hydroxylamine ( NH ₂ OH ) forms an oxime. C=O + NH ₂ OH C=N-OH + H ₂ O (b) Reaction with a primary amine ( R- NH ₂ ) forms a substituted imine, also known as a Schiff base. C=O + R- NH ₂ C=N -R + H ₂ O (c) Reaction with an alcohol ( R- OH ) in the presence of dry HCl gas forms a hemiacetal, which further reacts with another molecule of alcohol to form an acetal. RCHO + 2R' OH RCH(OR') ₂ + H ₂ O (d) Reaction with hydroge