Ca --Air--> (P + Q) --H2O--> R + S↑ | |--CO2--> T (White ppt.) S↑ + CO2 --> U + H2O Which of the fol — AITS & Test Series Chemistry Question

Question

Ca --Air--> (P + Q) --H2O--> R + S↑ | |--CO2--> T (White ppt.) S↑ + CO2 --> U + H2O Which of the following is 'U'?