Question

$NaOH$ can be used to separate ${Al\left(OH\right)}_3$ and ${Zn\left(OH\right)}_2$.

• A. yes
  
• B. no
  
• C. in High temperature only
• D. in high pressure only
  
• E. none of the above

Answer 1

The correct option is B no

The given statement is false.
$NaOH$ can not be used to separate ${Al\left(OH\right)}_3$ and ${Zn\left(OH\right)}_2$.
${Al\left(OH\right)}_3$ and ${Zn\left(OH\right)}_2$ are soluble in $NaOH$.
Aluminum hyddroxide reacts with NaOH to form soluble sodium zincate.
${Al\left(OH\right)}_3+NaOH⟶{NaAlO}_2+H_{2}O$ or $Na\left[{Al\left(OH\right)}_4\right]$
Zinc hydroxide reacts with sodium hydroxide to form sodium zincate.
${Zn\left(OH\right)}_2+NaOH⟶{Na}_2\left[{Zn\left(OH\right)}_4\right]$ or ${Na}_2{ZnO}_2+H_{2}O$