Question

yold Cud!
6. Which of these is a reversible change?
a. Metal contracting
b. Baking a cake
c. Ripening of fruits
d. Blooming of flowers
7. Which of these is an irreversible change?
a. Melting of candle wax
b. Burning of candle wa
c. Melting of ice
d. Boiling of water
8. How do you change burnt paper back into its original form?
a. By cooling it
b. By heating it
c. By leaving it at room temperature
d. You cannot
CHANGES AROUND US B-25​

Answer 1

Answer:

6 a

7 b

8 d

Explanation:

8 - as we burn paper it turns into ash and we cannot change it back to its original form

Answer 2

Answer:

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6. Which of these is a reversible change?

a. Metal contracting

7. Which of these is an irreversible change?

b. Burning of candle wax

8. How do you change burnt paper back into its original form?

d. You cannot

When a paper is burnt, the molecules of paper undergo change forming new substances like smoke and water vapour. The change here is irreversible. So, a burnt piece of paper cannot be brought back to its original form.