Question:
Which one of the following sets is not correctly matched?
Which one of the following sets is not correctly matched?
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Silicates are compounds containing silicon-oxygen tetrahedra. Magnetite and malachite do not belong to this category.
Updated On: Mar 19, 2025
- Cuprite, haematite – oxide ores
- Calamine, siderite – carbonate ores
- Magnetite, malachite – silicate ores
- Sphalerite, fool’s gold – sulphide ores
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The Correct Option is C
Solution and Explanation
Step 1: Understanding ore classification.
- Cuprite (Cu$_2$O) and haematite (Fe$_2$O$_3$) are oxides.
- Calamine (ZnCO$_3$) and siderite (FeCO$_3$) are carbonates.
- Magnetite (Fe$_3$O$_4$) is an oxide, not a silicate. Malachite (Cu$_2$(OH)$_2$CO$_3$) is a carbonate.
- Sphalerite (ZnS) and fool’s gold (FeS$_2$) are sulphides.
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