Question

$A{l}^{3+}$, $F{e}^{3+}$, and $C{r}^{3+}$, are grouped together for qualitative analysis because their :

• A. Carbonates are insoluble in $N{H}_3$
• B. Hydroxides are insoluble in $N{H}_3$
• C. Sulphides are soluble in acid
• D. None of these

Answer 1

The correct option is B Hydroxides are insoluble in $N{H}_3$

Option (B) is correct.

$A{l}^{3+}$, $F{e}^{3+}$, and $C{r}^{3+}$, are grouped together for qualitative analysis because their hydroxides are insoluble in $N{H}_3$

III group radicals are precipitated as hydroxides.