Question

If true enter 1, else enter 0.
$NaOH$ can be used to separate ${Al\left(OH\right)}_3$ and ${Fe\left(OH\right)}_3$.

• A. 1

Answer 1

The correct option is A 1
The given statement is true.
${Al\left(OH\right)}_3$ and ${Fe\left(OH\right)}_3$. can be separated by using $NaOH$.
${Fe\left(OH\right)}_3$ is insoluble in aqueous NaOH solution. On the other hand ${Al\left(OH\right)}_3$ is soluble in $NaOH$. It forms ${NaAlO}_2$ or $Na\left[{Al\left(OH\right)}_4\right]$.
Aluminum hydroxde dissolves in excess of NaOH to form sodium meta aluminate.
$Al(OH{)}_3+NaOH\to \underset{sodiummetaaluminate}{Na\left[Al{O}_2\right]}+2H_{2}O$