Question

give reason- why don't all Combustion produce light or flame​

Answer 1

Answer:

The chemical process in which a substance reacts with oxygen to give off heat is called combustion. ... The substances which vaporize during burning give flames. For example combustion of kerosene oil produces flame. On the other hand certain substances like coal do not vaporize and hence doesn't produce a flame.

Explanation:

Answer 2

Answer:

due to the chemical change

Explanation:

it does not produce a both