What would you observe if you add with shaking excess of dilute \( \mathrm{NaOH} \) solution to ...

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What would you observe if you add with shaking excess of dilute \( \mathrm{NaOH} \) solution to an aqueous solution of \( \mathrm{AlCl}_{3} \) ?
(A) A permanent white ppt. is formed
(B) No change at first, but a white ppt. is formed on standing (b).
(C) A white ppt. is formed which later dissolves
(D) A green ppt. which turns red on standing in air
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