Question

A gas X reacts with dry slaked lime water and forms compound Y which is used as bleaching agent

Answer 1

Ca(OH)²+Cl²=CaOCl²+H²O

(X) (Y)

Answer 2

Gas X - Chlorine (${Cl_{2}}$)

Compound Y = Bleaching powder (${CaOCl_{2}}$

Reaction

${Ca(OH)_{2} + Cl_{2} ----> CaOCl_{2} + H_{2}O}$