Question

Acetone shows similarity with acetaldehyde in reaction with

• A. Schiff's reagent
• B. Fehling solution
• C. Grignard reagent
• D. Tollen's reagent

Answer 1

The correct option is C Grignard reagent

Acetone and acetaldehyde both contain $>C=O$ group.

(a) Schiff’s reagent : Acetaldehyde+ Schiff reagent $\to$ Magenta colour
Acetone + Schiff reagent $\to$ No magenta colour

(b) Fehling solution:
Acetaldehyde+ Fehling solution $\to$ Positive test (Red ppt form)
Acetone + Fehling solution $\to$ Negative test (No red ppt form)

(c) Grignard reagent:



Both show a similar mechanism with the Grignard reagent during nucleophilic substitution/addition reaction.

(d) Tollen’s reagent or silver mirror test:
Acetaldehyde + Tollen’s reagent $\to$ Positive test
Acetone + Tollen’s reagent $\to$ Negative test

Hence, the correct option is (c).