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A mixture of $Al(OH)_3$ and $Fe(OH)_3$ can be separated by

$\begin{array}{1 1}(a)\;HCL&(b)\;NH_4OH\\(c)\;NaOH&(d)\;HNO_3\end{array}$

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Excess of NaOH with aluminium hydroxide dissolves white ppt.Where as ppt of ferric hydroxide does not dissolve with NaOH.
Hence (c) is the correct answer.
answered Jan 27, 2014 by sreemathi.v
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