A compound X on electrolysis in aqueous solution produces a strong base. Y along with two gases A and B . B is used in manufacture of bleaching powder. Identify X,Y,Aand B . Write chemical equations

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Solution

we know that common salt, i.e., NaCl is used for the manufacture of sodium hydroxide, i.e., NaOH, and this process is called the chloro-alkali process.
The chemical equation of this process is-
$2 N a C l_{(a q)} + 2 H_{2} O_{(l)} ⟶ 2 N a O H + C l_{2 (g)} + H_{2 (g)}$

X=sodium chloride y=sodium hydroxide A=hydrogen gas B=Chlorine gas.

The active ingredient in bleaching powder is calcium hypochlorite, $C a {(O C l)}_{2}$ , and so gas "b" must be chlorine since chlorine is reacted with calcium hydroxide to make calcium hypochlorite and calcium chloride.

The most likely suspects are NaCl solution being electrolyzed to make a solution of NaOH hydrogen gas and chlorine gas.

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