Assertion :Calcium floats over water during the reaction with water. Reason: Calcium reacts with water less vigorously so that the heat evolved is not sufficient for the hydrogen formed, to catch fire. The bubbles of hydrogen gas formed stick to the surface of the water calcium

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Calcium reacts with water less vigorously so that the heat evolved is not sufficient for the hydrogen formed, to catch fire. Instead, calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the water calcium. Therefore, Calcium floats over water during the reaction with water.

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