Mark the compound which turns black with $NH_4OH$.

Which of the following sulphates is insoluble in water?

The solution of $BiCl_{3}$ in dil. $HCl$ when diluted with water,forms a white precipitate which is:

Which of the following basic radicals will not be precipitated by $H_2S$ gas in the presence of $NH_3$?

Nessler's reagent is used to detect

Sodium Carbonate cannot be used in place of $(NH_4)_2CO_3$ for the identification of $Ca^{2+}$,$Ba^{2+}$,and $Sr^{2+}$ ions (in group $V$) during mixture analysis because