Formula of bleaching powder class 10

Asked by admin @ in CBSE BOARD X viewed by 325 People

(a) Write the chemical name and formula of bleaching powder. (b) Why does bleaching powder smell of chlorine when exposed to air? (c) Write chemical equation to represent the action of dilute hydrochloric acid on bleaching powder.

Answered by admin @


(a) The chemical name of bleaching powder is calcium oxychloride and its formula is  ‎Ca(ClO)2
(b) When exposed to air, bleaching powder reacts with carbon dioxide in air to produce calcium carbonate and chlorine. Thus, it smells of chlorine.
(c) When bleaching powder is treated with an excess of dilute hydrochloric acid, all the chlorine present in it is liberated. The following equation shows the reaction taking place.

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