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What happens when calcium is treated with water?
(i) It does not react with water.
(ii) It reacts violently with water.
(iii) It reacts less violently with water.
(iv)Bubbles of hydrogen gas formed stick to the surface of calcium.

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(i) and (iv)

(ii) and (iii)

(i) and (ii)

(iii) and (iv)

answer is D.

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Detailed Solution

When calcium reacts with water, it tends to displace hydrogen from the water. Along with this,

it produces bubbles of hydrogen gas as well as calcium hydroxide.

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