question_answer

  In one of the industrial processes used for manufacture of sodium hydroxide, a gas X is formed as a byproduct. The gas X react with dry slaked lime to give a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y.

Answer:

                  When it rains, the gases like etc of the atmosphere dissolve into it and its pH < 7. Thus, when pH of rain water falls below 5?6, it is called acid rain.               (1+1)