Question

Which of the following compounds is/are partially soluble or insoluble in $N{H}_{4}OH$ solution?
(1) $Fe(OH{)}_3$ (2) $A{g}_{2}Cr{O}_4$ (3)$Al(OH{)}_3$ (4)$A{g}_{2}C{O}_3$ (5) $Ni(OH{)}_2$

• A. 1, 3 and 5
• B. 2, 3 and 4
• C. 1 and 3
• D. 2, 3 and 5

Answer 1

The correct option is C 1 and 3

$F{e}^{3+},A{l}^{3+},C{r}^{3+}$ form ppt with $N{H}_{4}OH$.
$Fe(OH{)}_3$ = Brown ppt
$Al(OH{)}_3$ = White ppt
$Cr(OH{)}_3$ = Green ppt