Question

why some materials burn and why some do not?give reasons.​

Answer 1

every material burn you can tell which can't
only water it also boil
some have high boiling point

Answer 2

because ...

that is , its a reaction of substance with oxygen that gives out heat nd is fast enough to become self sustaining . for example sugar burns according to the given equation.

c6H12o6+6o2=6co2+6H2o

hope its help u .