Question

How does a substance produce flame?

Answer 1

Explanation:

The substances which vaporize during burning produces flame. As these substances heat up, like candles, the rising C-atoms produce light. Heat produces light, which is known as incandescence. This causes formation of visible flame.

Answer 2

Answer:

Only the substances which vaporize produce flame....and when we light them up...we can see flame as Heat produces heat

hope it helps you :)