- Question Answer
- Why does the matchstick start burning on rubbing it on the side of the matchbox?
. Why does the matchstick start burning on rubbing it on the side of the matchbox?
The rubbing surface contains powdered glass and a little red phosphorus. The head of the matchstick contains antimony trisulphide and potassium chlorate. When the matchstick is struck against the rubbing surface then some red phosphorus gets converted into white phosphorus which readily reacts with potassium chlorate of the head of the matchstick to produce sufficient heat to ignite antimony trisulphide. Thus the matchstick starts burning.