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Q.

What happens when calcium reacts with water?

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a

Calcium evolves

b

Calcium starts to float

c

No reaction

d

Calcium settles down at the base of the vessel

answer is B.

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Detailed Solution

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The reaction of calcium with water is less violent. The heat evolved is not sufficient for the hydrogen to catch fire. Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal.

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