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NEET UG CHEMISTRY MCQ: CO-ORDINATION COMPOUNDS

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Analyzing +4 | -1
An inorganic compound ‘X’ on treatment with concentrated on H2SO4{\mathrm{H}_2}\mathrm{S}{\mathrm{O}_4} produces brown fumes and gives dark brown ring with FeSO4\mathrm{FeS}{\mathrm{O}_4} in presence of concentrated H2SO4.{\mathrm{H}_2}\mathrm{S}{\mathrm{O}_4}.
Also compound ‘x’ gives precipitate ‘Y’, when its solution in dilute HCl is treated with H2S{\mathrm{H}_2}\mathrm{S} gas.
The precipitate ‘Y’ on treatment with concentrated HNO3\mathrm{HN}{\mathrm{O}_3} followed by excess of NH4OH\mathrm{N}{\mathrm{H}_4}\mathrm{OH} further gives deep blue coloured solution, compound ‘X’ is
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Correct option: C
Cu(NO3)2Cu{\left( {N{O_3}} \right)_2}
Option C (Cu(NO3)2Cu{\left( {N{O_3}} \right)_2}) is correct because it produces brown fumes with concentrated H2SO4H_2SO_4, gives a dark brown ring test with FeSO4FeSO_4, and forms a deep blue solution with excess NH4OHNH_4OH after precipitating a sulfide.

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