HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryMetallurgyAchiever Section
Among the following statements, the incorrect one is:
A.Calamine and siderite are carbonates
B.Argentite and cuprite are oxides✓ Correct
C.Zinc blende and pyrites are sulphides
D.Malachite and azurite are ores of copper
Explanation
The formula of calamine is 3 ZnCO , the formula of siderite is 3 FeCO , the formula of cuprite is 2 Cu O , the formula of argentite is 2 Ag S , the formula of zinc blend is ZnS, the formula of pyrites is 2 FeS , the formula of malachite is 3 2 CuCO .Cu(OH) , and the formula of azurite is 3 3 2 2 Cu (CO ) (OH) . So, the option (b) is incorrect.
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