Which of the following match is $INCORRECT$ :

The correct option$(s)$ to distinguish nitrate salts of $Mn^{2+}$ and $Cu^{2+}$ taken separately is (are):
$(A)$ $Mn^{2+}$ shows the characteristic green colour in the flame test
$(B)$ Only $Cu^{2+}$ shows the formation of precipitate by passing $H_2S$ in acidic medium
$(C)$ Only $Mn^{2+}$ shows the formation of precipitate by passing $H_2S$ in faintly basic medium
$(D)$ $Cu^{2+}/Cu$ has higher reduction potential than $Mn^{2+}/Mn$ (measured under similar conditions)

When $H_2S$ gas is passed through a solution,it reacts to form a white precipitate. Which ion is present in the solution?

Which one of the following statements is correct?

In which of the following is lead sulfate $(PbSO_4)$ soluble?

The ion that can be precipitated by $HCl$ as well as $H_2S$ is