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General Principles and processes of Isolation of Elements
medium
Which one of the following statements is incorrect
A
Calamine and siderite are carbonates
B
Argentite and cuprite are oxides
C
Zinc blende and pyrites are sulphides
D
Malachite and azurite are ores of copper
Solution
Cuprite $Cu _2 O$ and argentite $Ag _2 S$.
Calamine $ZnCO _3$ and siderite $FeCO _3$.
Zinc Blende $ZnS$ and pyrites $FeS _2$.
Malachite $CuCO _3 \cdot Cu ( OH )_2$ and azurite $Cu _3\left( CO _3\right)_2( OH )_2$.
Standard 12
Chemistry
