The brown ring test is used to detect the presence of which ion?

$A$ chloride salt solution acidified with dil. $HNO_3$ gives a curdy white precipitate,$[A]$,on addition of $AgNO_3$. $[A]$ on treatment with $NH_4OH$ gives a clear solution,$B$. Identify $[A]$ and $B$.

In the detection of $II$ group acid radical,the salt containing chloride is treated with concentrated sulphuric acid,the colourless gas is liberated. The name of the gas is

$A$ reagent consisting of $1$-naphthylamine and sulphanilic acid in acetic acid is used for the detection of:

The incorrect statement in respect of the chromyl chloride test is:

To a solution of a colourless sodium salt,a solution of lead nitrate was added to form a white precipitate which dissolves in warm water and reprecipitates on cooling. Which of the following acid radicals is present in the salt?