Question

(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.

Answer 1

(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.

Answer 2

ReQuired Answer:-

a) Question:-

The chemical name of the formula of bleaching powder?

a) Answer:-

The chemical name of the formula of bleaching powder is oxychloride.

Formula :-

$\hookrightarrow{ \underline{ \boxed{ \boxed{ \sf{Ca(ClO)_2 \:}}}}} \star$

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b) Question:-

Why does bleaching powder smell of chlorine when exposed to air?.

b) Answer:-

because, it forms a compound of bleaching powder. In that the Chlorine exposed to the as soon as it exposed in the open ,then the Substance become moist due the presence of moisture.The smell of chlorine gets activated and mixes with atmosphere.

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c) Question:-

Write chemical equation to represent the action of dilute hydrochloric acid on bleaching powder?

c) Answer:-

When bleaching powder is reacts with dilute hydrochloric acid to liberate the Chlorine gas, water, Calcium chloride.It forms:-

$\hookrightarrow{ \underline{ \boxed{ \boxed{ \sf{CaClO_2 + HCL \rightarrow CaCl_2 + Cl_2 + H_2O \:}}}}} \star$

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