3. Change of bud into flower is a change which can not be reversed. Give four more such examples.

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Solution

Part 1: Irreversible change
The changes in which new substances are formed, cannot be converted into the original substance from which they are formed.
The change of a bud into a flower is an irreversible change.
Part 2: More examples of irreversible change
Rusting of iron
Formation of curd from milk.
Cooking of food
Ripening of fruits

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Similar questions

Q. Give four examples of reversible changes occurring around you.

Question 17

Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

1. Give one example of this kind of case

(a) Change which occurs on heating and can be reversed.

2. Give examples of changes which can be reversed easily.

Question 15

Give one example in each case.
Change which occurs on heating but can be reversed.
Change which occurs on heating but cannot be reversed.
Change which occurs on cooling but can be reversed.
Change which occurs on mixing two substances but can be reversed.
Change which occurs on mixing two substances but cannot be reversed.

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