A chloride salt solution acidified with dil. HNO_3 gives a curdy white precipitate, [ A ], on addition of AgNO_3. [A] on treatment with NH_4 OH gives…

A chloride salt solution acidified with dil. $\displaystyle \mathrm{HNO}_3$ gives a curdy white precipitate, $\displaystyle [\mathrm{A}]$, on addition of $\displaystyle \mathrm{AgNO}_3$. [A] on treatment with $\displaystyle \mathrm{NH}_4 \mathrm{OH}$ gives a clear solution, B . $\displaystyle A$ and $\displaystyle B$ are respectively