Question

why would the wood not be set on fire by the matchstick

Answer 1

When the matchstick is rubbed against the side of the match box, some of the red phosphorus is converted into white phosphorus; this immediately reacts with potassium chlorate in the matchstick head to produce enough heat to ignite antimony trisulphide and starts the combustion of matchstick. The wood however needs more heat than the frictional heat to set on fire and does not catch on fire.

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Answer 2

Hey Rohanviru...!!!

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Pls find the answer below:

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♦ A substance burns only when it reaches its ignition temperature, as paper has a lower ignition temp. than that of log of wood, hence can be burned by a matchstick, but a log of wood needs more energy to reach the ignition temp, hence cannot be burned by a matchstick.

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Hope it helps..!!! ☺☺☺