In one of the industrial processes for manufacture of sodium hydroxide a gas x is formed as by product .The gas x reacts with lime water to give a compound y which used as a bleaching agent in chemical industry. Identify x and y giving the chemical equation of the reactions involved

Explanation

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.) + 2H_(2)O(l) + 2NaOH(aq.) + Cl_(2)(g) + H_(2)(g)`
`X rarr Cl_(2)` (chlorine gas)
`Ca(OH)_(2)(s) + Cl_(2)(g) rarr CaOCl_(2)(s) + H_(2)O`
Y- Calcium oxychloride (bleaching powder)