Assertion :Glass tumbler breaks in winter when hot water is poured in it. Reason: When hot water is poured, the outer surface of glass expands.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
When a winter, hot water is poured in the glass tumbler, its inner surface tends to expand while the outer surface in contact with cold atmosphere does not. This opposite interaction causes the tumbler to break.
Hence, option C is correct.

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