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Which of the following salts does not form any precipitate with excess of $NaOH$?

$\begin{array}{1 1}(a)\;ZnCl_2&(b)\;FeCl_3\\(c)\;CrCl_3&(d)\;CuSO_4\end{array}$

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$Zncl_2+NaOH\rightarrow Zn(OH)_2\quad\underrightarrow{NaOH}\quad Na_2ZnO_2$
Hence (a) is the correct answer.
answered Jan 27, 2014 by sreemathi.v
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