Question

a) How chloride of lime chemically differs from calcium chloride?
(b) What happens when chloride of lime reacts with sulphuric acid ? Write chemical equation involved.
(c) Mention two uses of chloride of lime.


CBSE Class X Science SA 2 (3 Marks)

Answer 1

(a) Chemically chloride of lime is known as calcium oxychloride.
 (b) 2CaOCl2(s) + H2SO4(aq) → CaSO4(aq) + CaCl2(aq) + 2HClO(aq) HClO → HCl + [O] Hypochlorous acid Nascent oxygen Coloured Substance + [O] → Colourless.
(c) (i) Bleaching powder is used for bleaching purposes in textile and paper industry and in laundry.
(ii) It is also used as a disinfectant for water.

Answer 2

(a) Chemically chloride of lime is known as calcium oxychloride.

(c) (i) Bleaching powder is used for bleaching purposes in textile and paper industry and in laundry.

(ii) It is also used as a disinfectant for water.