Assertion :When hot water is poured in a beaker of thick glass, the beaker cracks Reason: Outer surface of the beaker expands suddenly

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 hot water is poured in a beaker of thick glass, the temperature of inner surface of glass increases suddenly. Thus the inner surface of the beaker suddenly expands, with the outer surface being at almost constant temperature.
Thus the glass beaker cracks.

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