A chemical A is used for the preparation of washing soda to recover ammonia. When $C O_{2}$ is bubbled through an aqueous solution of A, the solution turns milky. It is used in white washing due to disinfectant nature. What is the chemical formula of A?

C a (H C O_{3})_{2}

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C a O

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C a (O H)_{2}

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C a C O_{3}

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Solution

The correct option is B $C a (O H)_{2}$
$C a (O H)_{2}$ is used in Solvay process i.e., preparation of washing soda $(N a_{2} C O_{3} .10 H_{2} O)$ to recover $N H_{3}$ . $2 N H_{4} C I + C a (O H)_{2}^{'} A^{'} \to 2 N H_{3} + C a C l_{2} + H_{2} O$
$C a (O H)_{2} + C O_{2} \to C a C O_{3} ↓ + H_{2} O$
A Milkiness $C a (O H)_{2}$ is used in white washing due to its disinfectant nature.

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A chemical A is used for the preparation of washing soda to recover ammonia. When $C O_{2}$ is bubbled through an aqueous solution of A, the solution turns milky. It is used in white washing due to disinfectant nature. What is the chemical formula of A?
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A chemical A is used for the preparation of washing soda to recover ammonia. When CO2 is bubbled through an aqueous solution of A, the solution turns milky. It is used in white washing due to disinfectant nature. What is the chemical formula of A?

The correct option is B Ca(OH)2 Ca(OH)2 is used in Solvay process i.e., preparation of washing soda (Na2CO3.10H2O) to recover NH3. 2NH4CI+Ca(OH)′2A′→2NH3+CaCl2+H2O Ca(OH)2+CO2→CaCO3↓+H2O A Milkiness Ca(OH)2 is used in white washing due to its disinfectant nature.

A chemical A is used for the preparation of washing soda to recover ammonia. When $C O_{2}$ is bubbled through an aqueous solution of A, the solution turns milky. It is used in white washing due to disinfectant nature. What is the chemical formula of A?