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(C) Barium chloride $(BaCl_2)$ reacts with sulfate ions $(SO_4^{2-})$ to form a white precipitate of barium sulfate $(BaSO_4)$.For a complex to give t

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$[Co(NH_3)_5NO_2]SO_4$

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(C) Barium chloride $(BaCl_2)$ reacts with sulfate ions $(SO_4^{2-})$ to form a white precipitate of barium sulfate $(BaSO_4)$.For a complex to give this precipitate,the $SO_4^{2-}$ ion must be present as a counter-ion outside the coordination sphere.In the complex $[Co(NH_3)_5NO_2]SO_4$,the sulfate ion is present as a counter-ion.The reaction is: $SO_4^{2-} (aq) + Ba^{2+} (aq) ightarrow BaSO_4 (s) 	ext{ (White precipitate)}$.

Which complex among the following gives a white precipitate on treatment with an aqueous solution of barium chloride?

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