Chemical $\left(A\right)$ is used for water softening to remove temporary hardness. $\left(A\right)$ reacts with $N{a}_{2}C{O}_3$ to generate caustic soda. When $C{O}_2$ is bubbled through $\left(A\right)$, it turns cloudy.

What is the chemical formula of $\left(A\right)$?

Q.

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When $C{O}_2$ is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A

Q. A chemical $\left(A\right)$ is used for water softening to remove temporary hardness. $\left(A\right)$ reacts with sodium carbonate to generate caustic soda. When $C{O}_2$ is bubbled through the solution of $\left(A\right)$, it turns cloudy. What is the chemical formula of $\left(A\right)$?

Q. A chemical $\left(A\right)$ is used for water softening to remove temporary hardness. $\left(A\right)$ reacts with sodium carbonate to generate caustic soda. When $C{O}_2$ is bubbled through the solution of $\left(A\right)$, it turns cloudy. What is the chemical formula of $\left(A\right)$?

Q.

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

Q. Chemical A is used for softening of water to remove temporary hardness. A reacts with sodium carbonate to produce caustic soda, when $C{O}_2$ is bubbled through 'A', it turns cloudy. Chemically 'A' is: