Question

Why it is so difficult to burn a combustible substance than other

Answer 1

Thank you for asking the question!

Combustible substances are difficult to burn because they are highly reactive. they can easily catch fire and in severe cases they can even cause explosion. Moreover, very strict precautionary measures are required to tackle and burn combustible substances and; The conditions in which they are to be burnt must be kept in mind. Like the person must be aware of the ignition temperature or the temperature of the environment. 

I hope it helps.

Answer 2

combustible substance are difficult to burn because they are highly reactive and they easily catch fire and so it is difficult to burn them

they are the substances which can easily burst into flame and even lead to explosion

hope this helps you...