Which of the following formulas represents galena?
- A$CaSO_4 \cdot 2 H_2 O$
- B$PbS$
- C$ZnS$
- D$BaSO_4$
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Which occurs in nature in free state?
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View SolutionWhich one of the following ores does not contain iron?
What has been proven by the radiocarbon dating of charcoal from slag?
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View SolutionMatch the ores (Column $A$) with the metals (Column $B$):
Column $A$: Ores Column $B$: Metals $I$. Siderite $a$. Zinc $II$. Kaolinite $b$. Copper $III$. Malachite $c$. Iron $IV$. Calamine $d$. Aluminium
| Column $A$: Ores | Column $B$: Metals |
| $I$. Siderite | $a$. Zinc |
| $II$. Kaolinite | $b$. Copper |
| $III$. Malachite | $c$. Iron |
| $IV$. Calamine | $d$. Aluminium |
Which one of the following types of metals is expected to occur in the native state?
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