Answer:
In the manufacture of sodium hydroxide,
hydrogen gas and chlorine gas (X) are formed as by-products. When chlorine gas
(X) reacts with lime water, it forms calcium oxychloride (bleaching powder) Y.
The reactions are 2NaCl(aq) + 2H2O(l) ®
2NaOH(aq) + Cl2(g) + H2(g) X ? Cl2 (Chlorine
gas) Ca(OH)2(s) + Cl2(g) ®
CaOCl2(s) +H2O(l)
Y
? Calcium oxychloride (bleaching powder)
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