Question

Which is combustible and which is not combustible- charcoal,chalk stone iron rod,copper coin,straw ,cardboard, glass

Answer 1

straw cardboard charcoal are combustible and rest of them are not combustible

Answer 2

Hi
here is your answer
a) Combustible — charcoal, straw, card board

(b) Non-combustible — chalk, stone, iron rod, copper coin, glass.