Question

Which of the following is treated with chlorine to obtain bleaching powder?
(a) CaSO4
(b) Ca(OH)2
(c) Mg(OH)2
(d) KOH

Answer 1

Answer:

(B) ca(oh)2.................

Answer 2

Answer is Option (b)

Explanation:

When calcium hydroxide ($Ca(OH)_2$)(slaked lime) reacts with chlorine, it gives calcium oxy-chloride (bleaching powder - $CaOCl_2$)  and water ($H_2O$)is formed.

$Ca(OH)_2 + Cl --> CaOCl_2 + H_2O$

Calcium Hydroxide + Chlorine      Bleaching Powder  + Water

• Uses of Bleaching Powder -

a.) Bleaching Dirty Clothes

b.) In Cotton & Linen Industry

c.) As Oxidizer in Many Industries

d.) In order to get potable water, it is used as disinfectant