(d) $2CaOCl_{2}\overset{\ \ \ \ \ CoCl_{2}\ \ \ \ }{\rightarrow}2CaCl_{2} + O_{2}$ In presence of $CoCl_{2}$ (which act as catalyst) bleaching powder gives out oxygen.
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.