Question

When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.​

Answer 1

Changes during burning of a candle:​

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• Physical change=melting of wax.​

• Chemical change=wick of the candle gets burned during the process and it can not be reversed back.​

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Changes during making of chapati:​

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• Physical change- While rolling the chapati only the shape of the dough changes.​

• Chemical change- After the chapati is baked it cannot be reversed as the dough gets cooked.​