Which of the following ions can be separated by using `NH_(4)Cl` and `NH_(4)OH` ?

Options

A. `Fe^(3+) and Cr^(3+)`
B. `Cr^(3+) and Co^(2+)`
C. `Cr^(3+ and Al^(3+)`
D. `Al^(3+) and Ba^(2+)`

Answer

B, D