When `CO_(2)` is bubbled throgh a solution of barium peroxide in water

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO_(2) is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A ?

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO_(2) is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A ?

Chemical a is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO_(2) is bubbled through a solution of a. it turns coludly. What is chemical formula of A

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO_2 is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?

The compound 'A' on heating gives a colourless gas and a residue. The residue dissolves in water to obtain (B). When excess of CO_(2) is bubbled through aqueous solution of B gentle heating gives back A. Compound 'C' is

The chemical formula of barium peroxide is

How is barium peroxide prepared?