Which of the following compounds will give a precipitate with $Pb(NO_3)_2$ but will not give a precipitate with $Ba(NO_3)_2$?

Which reagent is used to remove $SO_4^{2-}$ and $Cl^{-}$ ions from a solution?

When salt $BA$ is treated with concentrated $H_2SO_4$, a reddish-brown gas is liberated. The aqueous solution of $BA$ gives a pale yellow precipitate with $AgNO_3$ solution. Which of the following anions $(A^-)$ is present in the salt $BA$?

Chromyl chloride vapours are dissolved in $NaOH$ and acetic acid and lead acetate solution is added,then

Sodium salt solution $+ \, AgNO_3$ solution $\to$ Coloured precipitate: If the coloured precipitate is soluble in both dilute $HNO_3$ and excess concentrated $NH_3$ solution,then which of the following anions is present in the salt solution?

$A$ salt,which on heating with conc. $H_2SO_4$ gives violet vapours,is