Question:
Identify the incorrect match
Identify the incorrect match
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Memorize ore formulas: Malachite is Cu$_2$(OH)$_2$CO$_3$, not sulfide. Siderite, calamine are carbonates. Fools gold is pyrite (FeS$_2$). Verify mineral compositions.
Updated On: Oct 27, 2025
- Siderite - FeCO$_3$
- Malachite - Cu$_2$S
- Calamine - ZnCO$_3$
- Fools gold - FeS$_2$
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The Correct Option is B
Solution and Explanation
1. (1) Siderite: FeCO$_3$, correct (iron carbonate ore).
2. (2) Malachite: Cu$_2$(OH)$_2$CO$_3$, not Cu$_2$S (chalcocite), incorrect.
3. (3) Calamine: ZnCO$_3$, correct (zinc carbonate ore).
4. (4) Fools gold: FeS$_2$ (pyrite), correct.
5. Thus, the incorrect match is (2) Malachite - Cu$_2$S.
2. (2) Malachite: Cu$_2$(OH)$_2$CO$_3$, not Cu$_2$S (chalcocite), incorrect.
3. (3) Calamine: ZnCO$_3$, correct (zinc carbonate ore).
4. (4) Fools gold: FeS$_2$ (pyrite), correct.
5. Thus, the incorrect match is (2) Malachite - Cu$_2$S.
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