On passing $HCl$ gas in a saturated solution of $NaCl$,the solubility of $NaCl$

When ammonium chloride is added to ammonia solution,the $pH$ of the resulting solution will be

$25 \ mL$ of silver nitrate solution $(1 \ M)$ is added dropwise to $25 \ mL$ of potassium iodide $(1.05 \ M)$ solution. The ion$(s)$ present in very small quantity in the solution is/are $........$.

If $S_1, S_2, S_3$ and $S_4$ are the solubilities of $AgCl$ in water,in $0.01 \ M \ CaCl_2$,in $0.01 \ M \ NaCl$ and in $0.05 \ M \ AgNO_3$ respectively at a certain temperature,the correct order of solubilities is

In the Solvay ammonia process,what causes the precipitation of sodium bicarbonate?

When $0.01 \ M \ HCl$ is added to an aqueous solution of acetic acid,then...