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Among the following the wrong one is

$ (a)\;\text{Calamine and siderite are carbonates are oxides } \\(b)\;\text{Argentite and cuprite .} \\(c)\;\text{Zinc blende and iron pyrites are sulphides} \\ (d)\;\text{Malachite and azurite are ores of copper} $
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Cuprite is $Cu_2O$ and Argentite is $Ag_2S$.
Hence b is the correct answer.
answered Mar 20, 2014 by meena.p

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