Question

Assertion: Aldehydes and ketones, both react with Tollens’ reagent to form silver mirror.
Reason: Both, aldehydes and ketones contain a carbonyl group.

Answer 1

Analysing the assertion

Only the aldehydes respond to Tollens’ reagent which oxidizes aldehydes to salt of carboxylic acids and simultaneously aldehydes reduce the $A{g}^{+}$ions of this reagent to metallic silver and a shiny silver mirror is formed.





Ketones do not give reactions with Tollens’ reagent. So, the assertion statement is wrong.

Analysing the reason

Both aldehydes and ketones contain a carbonyl group.



So, the reason is correct statement. Conclusion: Assertion is an incorrect statement but reason is correct.
So, option (D) is the correct answer.