Question

which of the following change can't be reversed : hardening of cement
2. freezing of ice cream
3. opening a door
4. melting of ice candy.
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Answer 1

Answer:

i think(3)is right

Explanation:

ok helps u dear

Answer 2

Melting of ice candy because if it will be melted then we can't change into its previous form. Hence, it is an irreversible change

Explanation:

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