Some words (underlined) in the following sentences are jumbled up. Write them in their correct form.

(a) Seldie is a combustible substance.

(b) Slags is a non-combustible material.

(c) Chittsmack does not burn by itself.

(d) Some substances on combustion produce thea and mafel.

(e) The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its ficalroic value.

(a) Diesel is a combustible substance.

Because it has an ability to catch fire very easily.

(b) Glass is a non-combustible material.

Because it does not catch fire.

(c) Matchstick does not burn by itself.

Because, its temperature is less than the ignition temperature.

(d) Some substances on combustion produce heat and flame.

Substances react with Oxygen and give heat and light.

(e) The amount of heat energy produced on complete combustion of 1Kg of a fuel is called its Calorific value.

Calorific value determines the efficiency of a fuel.