Question

Iron hydroxide can be separated from aluminium hydroxide by the addition of:

• A. dilute $HCl$
• B. sodium chloride solution
• C. sodium hydroxide solution
• D. none of the above

Answer 1

The correct option is C sodium hydroxide solution

Iron hydroxide can be separated from aluminium hydroxide by the addition of sodium hydroxide solution because $Al(OH{)}_3$ forms a soluble complex, sodium meta aluminate with $NaOH$.