When sodium nitroprusside is added to an alkaline solution containing sulfide ions,a ........ is obtained.

Which of the following pairs cannot be distinguished by passing $H_2S$ gas?

$A$ metal salt gives a yellow precipitate with potassium chromate in acetic acid and a white precipitate with dilute sulfuric acid,but it does not give a precipitate with sodium chloride or sodium iodide. What will be the composition of the white precipitate formed when sodium carbonate is added to the solution of this metal salt?

Which of the following ions gives a white precipitate when $HCl$ is added to its aqueous solution?

$A$ colourless crystalline salt $X$ is soluble in dilute $HCl$. On adding $NaOH$ solution,it gives a white precipitate which is insoluble in excess of $NaOH$. $X$ is

Which of the following statements is incorrect?