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 C O_{3}

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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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Solution

The correct option is D $C a (O H)_{2}$
Chemical A used in the preparation of washing soda Na2CO3 to recover ammonia is $C a (O H)_{2}$ . It is a reaction involved in the Solvay
$N H_{4} C l + C a (O H)_{2} \to 2 N H_{3} + C a C l_{2} + H_{2} O$
$C a (O H)_{2} + C O_{2} \to C a C O_{3} + H_{2} O$

$C a C O 3$ gives milkiness,

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Similar questions

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?
(a) $C a (H C O_{3})_{2}$ (b) CaO (c) $C a (O H)_{2}$ (d) $C a C O_{3}$