Metals like K, Na react __ with cold water whereas Ca reacts_ with cold water.

Violently, less violently

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Mildly, violently

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Violently, violently

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Mildly, does not react

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Solution

The correct option is A Violently, less violently
Metals like Na, K react violently with cold water to evolve hydrogen gas that catches fire. Ca on other hand, reacts less violently with cold water giving out hydrogen gas which does not catch fire.

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