The compound X on heating gives a colourless gas. The residue is dissolved in water to obtain Y. Excess of CO2 is bubbled through aqueous solution of Y, Z is formed. Z on gentle heating gives back X. The compound X is-

(A) CaCO3                                           

(B) Na2CO3

(C) CaSO4.2H2O                                 

(D) K2CO3

Concept Videos :-

#4 | Na2CO3 (Sodium Carbonate), Gypsum & POP

Concept Questions :-

Some Important Compounds of Ca
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level: