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प्रश्न
Give one example of change which occurs on mixing two substances, but cannot be reversed.
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उत्तर
Mixing of cement and water is an irreversible change.
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संबंधित प्रश्न
Long Answer Type Question:
Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.
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Analogy:
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Reversible change: ______.
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