Question

Which of the following ions can be separated by a $NH_4OH$ in presence of $NH_4Cl$

• A. $Al^{3+}$ and $Fe^{3+}$
• B. $Cr^{3+}$ and $Al^{3+}$
• C. $Cu^{3+}$ and $Al^{3+}$
• D. None of these

Answer 1

Answer: (C)

$Cu^{3+}$ and $Al^{3+}$

Answer 2

$Cu^{3+}$ is of group II and $Al^{3+}$ is of group III of cation analysis.