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Anomalous expansion of water

A glass stopp...

Question

A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why?

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Solution

A substance expands on heating. The neck of the bottle expands when hot water is poured over it. As a result, a small gap is created between the stopper and glass, enabling the easy removal of the stopper.

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Anomalous expansion of water

Standard VIII Chemistry

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