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प्रश्न
Which of the following change cannot be reversed?
विकल्प
Hardening of cement
Freezing of ice cream
Opening a door
Melting of chocolate
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उत्तर
Hardening of cement
Explanation:
Hardening of cement is cannot be reversed because once hardened it cannot come back to its original shape.
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संबंधित प्रश्न
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