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Question

Question 2

Which of the following changes cannot be reversed?
(a) Hardening of cement 
(b) Freezing of ice cream
(c) Opening a door 
(d) Melting of chocolate


Solution

Hardening of cement is an irreversible change because it can't be brought back to the powder form. Hence, this change cannot be reversed. So, option (a) is the correct answer.


Chemistry
NCERT Exemplar
Standard VI

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