1
Question
A matchstick burns on rubbing it on the side of the matchbox.
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Solution
When a match strikes on striking surface, the heat of the friction causes a reaction between the potassium chlorate in the match head and the red phosphorus in the striking surface. The Potassium chlorate present in the bulb provides oxygen for the reaction and the head lights up.
Potassium chlorate is an oxidising agent and provides necessary oxygen for combustion of phosphorus.
In modern matches, the bulb contains red phosphorus which will only ignite on being rubbed with potassium chlorate present on the rough strip of the matchbox.
The friction due to rubbing of the tip of the matchstick against the side of matchbox increase the temperature of the tip of matchstick due to which matchstick ignited
When a match strikes on striking surface, the heat of the friction causes a reaction between the potassium chlorate in the match head and the red phosphorus in the striking surface. The Potassium chlorate present in the bulb provides oxygen for the reaction and the head lights up.
Potassium chlorate is an oxidising agent and provides necessary oxygen for combustion of phosphorus.
In modern matches, the bulb contains red phosphorus which will only ignite on being rubbed with potassium chlorate present on the rough strip of the matchbox.
The friction due to rubbing of the tip of the matchstick against the side of matchbox increase the temperature of the tip of matchstick due to which matchstick ignited
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