1
Question
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) 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.
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Solution
(a) The correct form is:
Diesel is a combustible substance.
The substance that undergoes combustion is called as a combustible substance. It can also be called as a fuel.
(b) The correct form is:
Glass is a non-combustible material.
Glass will not burn when exposed to fire. Hence, it is a non-combustible material.
(c) The correct form is:
Matchstick does not burn by itself.
Ignition temperature of matchstick is generally higher than the room temperature, hence it will not burn by itself at room temperature. Its ignition temperature is achieved by striking the head of the matchstick against the sides of the matchbox.
(d) The correct form is:
Some substances on combustion produce heat and flame.
The process in which a substance reacts with oxygen to give off heat is called combustion.
(e) The corrected form is:
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its calorific value.
The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg).
Diesel is a combustible substance.
The substance that undergoes combustion is called as a combustible substance. It can also be called as a fuel.
(b) The correct form is:
Glass is a non-combustible material.
Glass will not burn when exposed to fire. Hence, it is a non-combustible material.
(c) The correct form is:
Matchstick does not burn by itself.
Ignition temperature of matchstick is generally higher than the room temperature, hence it will not burn by itself at room temperature. Its ignition temperature is achieved by striking the head of the matchstick against the sides of the matchbox.
(d) The correct form is:
Some substances on combustion produce heat and flame.
The process in which a substance reacts with oxygen to give off heat is called combustion.
(e) The corrected form is:
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its calorific value.
The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg).
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