Why does `Na_2CO_3` solution turn into a suspension, when saturated with `CO_2` gas ?

How do you test the CO_2 gas ?

Bleaching powder liberates "………" when treated with CO_(2) gas

When Na_2CO_3 aqueous solution is being titrated with hydrochloric acid {:("Column-I " , "Column-II") ,((A) " At the start of titration", (P) " Buffer solution of " HCO_3^(-) and CO_3^(-2)),((B) "Before the first equivalent point " , (Q) "Buffer solution "H_2CO_3and HCO_3^(-) ), ((C) "At the first equivalent point",( R ) "Amphiprotic anion "pH =(1//2) (p^(ka_1) +p^(Ka_2))), ((D) "Between first and second equivalent points" , (S) "Hydrolysis of "CO_3^(-2)) :}

Acetic acid liberates CO_2 gas with

Write any four uses of CO_2 gas.

Acidified K_2Cr_2O_7 solution turns green when Na_2SO_3 is added to it. This is due to the formation of

To 50 ml. of 0.1 N Na_(2)CO_(3) solution 150 ml. of H_(2)O is added. Then calculate the normality of resultant solution.