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
(i) (i) and (iv)
(ii) (ii) and (iii)
(iii) (i) and (ii)
(iv) (iii) and (iv)
Answer
- Calcium is a highly reactive metal so it reacts very violently with water.
- As it reacts, it displaces hydrogen from water.
- During the reaction, bubbles of hydrogen gas are produced.
The reaction is given below:
So, the correct answer is (d) (iii) and (iv)