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Question
Which complex among the following gives a white precipitate on treatment with an aqueous solution of barium chloride?
Options
[Pt(NH3)4Br2]Cl2
[Co(NH3)5SO4]NO2
[Co(NH3)5 NO2]SO4
[Pt(NH3)4 Cl2]Br2
MCQ
Solution
[Co(NH3)5 NO2]SO4
Explanation:
When treated with an aqueous solution of barium chloride, [Co(NH3)5 NO2]SO4 produces a white precipitate among the indicated coordination compounds. The following reaction can help to understand this.
\[\ce{[Co(NH3)5 NO2]SO4 + BaCl2(aq) -> [Co(NH3)5 NO2]Cl2 + \underset{\text{White ppt.}}{BaSO4(s)}}\]
The other given compounds do not give white ppt. due to absence of \[\ce{SO^{2-}_4}\] ions.
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