Question

How can you distinguish between propanal and propanone?

Answer 1

Propanal	Propanone
It forms silver mirror on reaction with Tollen's reagent.	It is not oxidised by Tollen's reagent.
It does not react with iodoform.	It gives positive iodoform test.
On reacting with Schiff's reagent, it gives pink colour.	It does not react with Schiff's reagent.