Aldehydes, Ketones and Carboxylic Acids · Question 38

Both acetaldehyde and acetone (individually) undergo which of the following reactions? Choose the correct answer from the options given below:

1. C and E Only
2. A, B and D Only
3. A, C and E Only
4. B, C and D Only

Answer

(3) A, C and E Only

Solution

Acetaldehyde CH3CHO and acetone CH3COCH3:

A. Both contain the CH3CO- group both give the iodoform test. ✓

B. Both have α-hydrogens neither undergoes the Cannizzaro reaction. ✗

C. Both have α-hydrogens both undergo aldol condensation. ✓

D. Acetone, a ketone, does not reduce Tollens' reagent. ✗

E. Both carbonyl groups are reduced to CH2 by Zn-Hg/conc. HCl (Clemmensen reduction). ✓

A, C and E.

Answer: (3)