Which cations give a precipitate on adding NH4OH in presence of excess NH4Cl?

JEE Main levelOne or more correct optionsDifficulty 2 of 3qc191

Which cations give a precipitate on adding $NH X_{4} OH$ in presence of excess $NH X_{4} Cl$ ?

The group III hydroxides of

Fe X^{3 +}

Al X^{3 +}

and

Cr X^{3 +}

precipitate at low

[OH X^{-}]

Zn X^{2 +}

is a group IV ion; with

NH X_{4} Cl

NH X_{4} OH

it stays as

[Zn (NH X_{3}) X_{4}] X^{2 +}