Differentiate between combustible and non-combustible substances. Write two examples of each .

 Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the substances that burn easily or catch fire easily are called combustible substances. Paper, petrol, clothes, LPG are all combustible substances. Without these substances, a fire cannot be started.

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

Substances that burn in air and tend to produce heat and light are known as combustible substances. For combustion, it is necessary to have fuel, heat and air. 

Non-combustible substance: the substances that will not ignite or burn and will not catch fire easily. Example: iron nails, stones, glass etc


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Updated on: 10-Oct-2022


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