Question

(a) Identify the compound of calcium which is yellowish white powder and is used for disinfecting drinking water. Write its chemical name and formula. How is it manufactured? Write the chemical equation for the reaction involved. Also list two other uses of the compound. 

(b) Write the balanced chemical equation qf chlor-alkali process.

Answer 1

(a) The compound is bleaching powder (CaOCl₂). Its chemical name is calcium oxychloride. It is manufactured by reaction of solid slaked lime with dry chlorine gas.

Ca(OH)₂ +Cl₂ → CaOCl₂ +H₂O

(i) It is used as disinfectant.

(ii) It is used for preparation of Chloroform.