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# Which compound forms a colored aqueous solution?

$(a)\;CaCl_{22} \\(b)\;CrCl_3 \\ (c)\;NaOH \\ (d)\;KBr$
Can you answer this question?

Colored aqueous solutions are a characteristic of transition compounds.
The only transition compound in the above choices is $CrCl_3.$
$Cr$ is a transition element.
Hence b is the correct answer.
answered Mar 14, 2014 by