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Q.

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?

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a

Ca(HCO3)2

b

CaO

c

Ca(OH)2

d

CaCO3

answer is C.

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Detailed Solution

CaOH2+2NH4Cl→ 2NH3+CaCl2+2H2O

CaOH2+CO2→ CaCO3Milky↓+H2O

 

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