Sodium nitroprusside,when added to an alkaline solution of sulphide ions,produces a purple colour due to the formation of:

Which of the following anions cannot be tested by $dil. H_2SO_4$?

Which of the statement is incorrect for the given paragraph?
Simple salt $\xrightarrow{\text{Flame test}}$ Golden yellow flame
Simple salt $\xrightarrow[MnO_2]{Conc. H_2SO_4} (X)$ Yellowish green gas
Simple salt $\xrightarrow{AgNO_3} (Z)$ White ppt. (Insoluble in dil. $HNO_3$)
Simple salt $\xrightarrow[Conc. H_2SO_4]{K_2Cr_2O_7} (Y)$ Reddish brown vapour

Which anion of a sodium salt gives a white precipitate upon heating with a magnesium salt?

$A$ white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution,a white precipitate is formed which does not dissolve in dilute nitric acid. The anion could be

The Chromyl chloride test is performed for the confirmation of the presence of which of the following in a mixture?