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What happens when calcium is treated wit...

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.

A

(i) and (iv)

B

(ii) and (iii)

C

(i) and (ii)

D

(iii) and (iv)

Text Solution

Verified by Experts

The correct Answer is:
D
Calcium a reacts slowly with water. The reaction forms calcium hydroxide, `Ca(OH)_(2)` , and hydrogen gas `(H_(2))` The calcium metal sinks in water and after an hour or so bubbles of hydrogen are observed, stuck to the surface of the metal.
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