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Those substance which can burn are called combustible substance.all kind of substance are burn by friction . The substances which are very high ignition temperature like Stones and meteoroids . Why we says it non combustible Substance.

Answer» Those substance which can burn are called combustible substance.all kind of substance are burn by friction . The substances which are very high ignition temperature like
Stones and meteoroids . Why we says it non combustible
Substance.


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