Which of the following salts do not have the water of crystallisation?\ i) Bleaching powder\ ii) P

Question

Which of the following salts do not have the water of crystallisation?\ i) Bleaching powder\ ii) Plaster of Paris\ iii) Washing soda\ iv) Baking soda\

Professor PC Thomas Classes · Answer

(d): Bleaching powder : $\mathrm{CaOCl}_{2}$ \ Plaster of Paris : $\mathrm{CaSO}_{4} \cdot 1 / 2 \mathrm{H}_{2} \mathrm{O}$\ Washing soda : $\mathrm{Na}_{2} \mathrm{CO}_{3} \cdot 10 \mathrm{H}_{2} \mathrm{O}$\ Baking soda : $\mathrm{NaHCO}_{3}$ \ Commonly made mistake - Washing soda is $\mathrm{Na}_{2} \mathrm{CO}_{3} \cdot 10 \mathrm{H}_{2} \mathrm{O}$ and baking soda is $\mathrm{NaHCO}_{3}$.