Question

Who am I: I am powdery and grey in colour I am left behind after combustion​

Answer 1

Answer:

Ash

Explanation:

hope this will help you

Answer 2

Answer:

wood ash

Explanation:

Ash is the solid, somewhat powdery substance that is left over after any fuel undergoes combustion. Broadly speaking, coal ash and wood ash are the two most talked about types of ash, although ash is created during any process of incomplete combustion.