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.

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Solution

Changes during burning of a candle:

Physical change=melting of wax.

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

Changes during making of chapati:

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.

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Chemical Change

Standard VII Chemistry

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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.​

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.