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Irreversible change

Which of the ...

Question

Which of the following is an irreversible change?

A

Melting of ice cream

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B

Formation of curd

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C

Folding of paper

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D

Melting of ice

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Solution

The correct option is B Formation of curd
A change which can't be undone is called an irreversible change. Here, curd can't be converted into milk. Hence it is an example of irreversible change.

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Q. Fill in the blanks with the correct words.
1. Melting of ice-cream is an example of a/an .................... (reversible/irreversible) change.
2. Ripening of fruits is an example of a/an .................... (reversible/irreversible) change.
3. Cooking of foood is an example of a/an .................... (reversible/irreversible) change.
4. Breaking of glass is a .................... (physical/chemical) change.
5. .................... (Heating/Cooling) causes steam to change into water.

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Digestion of food is a Q irreversible change. ( )
2. Rusting of iron is a reversible change. ( )
3. Melting of wax is a reversible change. ( )
4. Curding of milk is an irreversible change. ( )
5. Melting of ice cream is a reversible change. ( )

Q. Which of these is an irreversible change?
(a) melting of ice
(b) melting of wax
(c) boiling of water
(d) burning of wax

What are irreversible changes? Which of the two - the melting of ice and growth of a plant - is an irreversible change?

melting of ice is reversible ,irreversible change

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