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Q.

During the reaction of calcium with water, pieces of metal start floating due to the formation of?

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a

Ca(OH)2

b

H2

c

CO2

d

CO

answer is C.

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Detailed Solution

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Calcium and magnesium are two metals that start floating after some time when immersed in water. The bubbles of the hydrogen gas formed in the reaction stick to the surface of the metal surface, and thus the metals float on water.

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