Question 5
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

When a candle burns, both physical and chemical changes take place.
The melting wax is physical change as there is no formation of a new product.
The burning of wax is chemical change as, during the process of burning, new substances like smoke and soot are produced.
Cooking of food is both physical and chemical because raw vegetables get cooked which is a chemical change and the water changes into steam which is a physical change

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Question 5 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.

Question 5
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.