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

Step-by-step solution

Ca ( OH )₂ is used in the preparation of washing soda ( Na ₂ CO ₃ 10 H ₂ O . ) to recover ammonia ( NH ₃ ) . aligned & 2 NH ₄ Cl + Ca ( OH )₂ 2 NH ₃+ CaCl ₂+ H ₂ O & Ca ( OH )₂+ CO ₂ CaCO ₃ + H ₂ O aligned A milkiness Ca ( OH )₂ is used in white washing due to its disinfectant nature. Hence, the correct option is (3).