What do you mean by ignition temperature? Why a matchstick dose not catch fire on its own at room temperature?
Updated 1/12/2026
Food is a fuel for the body. Justify this statement.
Updated 1/12/2026
On putting glass over a lighted candle, the candle flame flickers and produce smoke, why so?
Updated 1/12/2026
Describe coal and its various products along with their uses.
Updated 1/12/2026
Why should we use some resources like coal and petroleum in limit?
Updated 1/12/2026
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