Differentiate between combustible and non-combustible substances.

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Solution

Combustible substances
Non-combustible substances
1. Substance that burns in air and produces heat and light. 1. Substances which are not combustible in the presence of air and do not produce heat and light.
2. Necessary ingredients – Heat, fuel and air. 2. These substances will not burn on being exposed to flame.
3. Substance is capable of burning or catching fire easily 3. Substance that is not capable of burning.
4. Oxygen is necessary for combustion to take place 4. Oxygen is not necessary.
5. Combustible substances can only burn if there are necessary ingredients such as heat, fuel and air. 5. Even if a non-comestible substance is exposed to flame, it will not combust.
3. Examples – Diesel, petrol, kerosene. 3. Examples – Glass, stones.

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Similar questions

(a) What are combustible substances ? Name three combustible substances.

(b) What are non-combustible substances ? Name three non-combustible substances.

What are combustible and Non combustible Substances?

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Combustible substances	Non-combustible substances
1. Substance that burns in air and produces heat and light.	1. Substances which are not combustible in the presence of air and do not produce heat and light.
2. Necessary ingredients – Heat, fuel and air.	2. These substances will not burn on being exposed to flame.
3. Substance is capable of burning or catching fire easily	3. Substance that is not capable of burning.
4. Oxygen is necessary for combustion to take place	4. Oxygen is not necessary.
5. Combustible substances can only burn if there are necessary ingredients such as heat, fuel and air.	5. Even if a non-comestible substance is exposed to flame, it will not combust.
3. Examples – Diesel, petrol, kerosene.	3. Examples – Glass, stones.