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Question

Identify the following as reversible or irreversible changes, with reasons:
i) mixing iron filings and sand
ii) shattering of glass
iii) melting of ice

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Solution

i) Mixing iron filings and sand is a reversible change, as iron filings are separated from sand using a magnet.

ii) Shattering of glass is an irreversible change as the small shattered glass pieces cannot be made back into the glass.

iii) Melting of ice is a reversible change since water can be frozen back into ice.

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