Question

Naphthalene burn with a yellow flame​

Answer 1

Answer:

some unburnt carbon particles are also farmed during combustion of unsaturated compounds. In the flame, these unburnt hot carbon particles emit yellow light and therefore the flame appears yellow. Hence, naphthalene burns with a yellow flame. Elements belonging to the same group have the same valency.

Answer 2

Answer:

cause it is an unsaturated compound