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Question

The difference between combustible over non-combustible substances is:

A

it cannot ignite

B

it can ignite

C

need low activation energy

D

need high activation energy

Easy

Solution

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Correct option is
B

it can ignite

Combustible substances:- Substances which burn in air to produce heat and light are called combustible substances. Eg:- wood, coal, charcoal, kerosene, petrol, diesel, liquefied petroleum gas (LPG), compressed natural gas (CNG) etc.

Non-Combustible substances:- Substances like stone, glass, iron nails, etc. do not burn on being exposed to flame. 

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