On addition of aqueous NaOH to a salt solution, a white gelatinous precipitate is formed, which dissolves in excess of alkali. The salt solution containsA. Chromous ionsB. Aluminium ionsC. Barium ionsD. Iron ions.

On addition of aqueous NaOH to a salt solution, a white gelatinous pre

1.	On addition of aqueous NaOH to a salt solution, a white gelatinous precipitate is formed, which dissolves in excess of alkali. The salt solution containsA. Chromous ionsB. Aluminium ionsC. Barium ionsD. Iron ions.
Answer» `Al^(3+) +3OH^(-) to underset("White gelationous ppt.")(Al(OH)_(3))` `Al(OH)_(3) (s) +NaOH (aq) to NaAlO_(2) (aq)+2H_(2)O (l)`.

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On addition of aqueous NaOH to a salt solution, a white gelatinous precipitate is formed, which dissolves in excess of alkali. The salt solution containsA. Chromous ionsB. Aluminium ionsC. Barium ionsD. Iron ions.

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