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Question
What happens when calcium is treated with water?
- It does not react with water
- It reacts violently with water
- It reacts less violently with water
- Bubbles of hydrogen gas formed stick to the surface of calcium
Options
(i) and (iv)
(ii) and (iii)
(i) and (ii)
(iii) and (iv)
Solution
(iii) and (iv)
Explanation -
Calcium reacts slowly with water. If a piece of calcium is dropped into a non-reactive container containing water after some times bubbles of hydrogen gas are seen stuck to the surface of the metal.
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