Chromyl chloride test is used for the detection of:

The $Chromyl$ $Chloride$ test is performed to detect which of the following ions?

Sodium sulphite on heating with dilute $HCl$ liberates a gas which

During the detection of an acidic radical present in a salt,a student obtains a pale yellow precipitate that is soluble with difficulty in $NH_4OH$ solution when the sodium carbonate extract is first acidified with dil. $HNO_3$ and then $AgNO_3$ solution is added. This indicates the presence of:

Among the following observations,the correct one that differentiates between $SO_{3}^{2-}$ and $SO_{4}^{2-}$ is:

When chlorine water is added to an aqueous solution of potassium halide in the presence of chloroform,a violet colour is obtained. On adding more chlorine water,the violet colour disappears,and a colourless solution is obtained. This test confirms the presence of which of the following in the aqueous solution?