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.

What happens when calcium is treated with water ? (i) It does not reac

1.	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.
Answer» (i) and (iv) (ii) and (III) (i) and (ii) (iii) and (iv) Solution :Calcium reacts comparatively less VIOLENTLY with water and floats on the surface DUE to HYDROGEN gas sticking to the surface of the metal.