Corundum is an ore of
- ACopper
- BBoron
- CAluminium
- DSodium
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The metal which mainly occurs as oxide ore in nature is
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Match the following items in List-$I$ with their corresponding formulas in List-$II$.
$A$. Feldspar $I$. $[Ag_3SbS_3]$ $B$. Asbestos $II$. $Al_2O_3 \cdot H_2O$ $C$. Pyrargyrite $III$. $MgSO_4 \cdot H_2O$ $D$. Diaspore $IV$. $KAlSi_3O_8$ $V$. $CaMg_3(SiO_3)_4$
| $A$. Feldspar | $I$. $[Ag_3SbS_3]$ |
| $B$. Asbestos | $II$. $Al_2O_3 \cdot H_2O$ |
| $C$. Pyrargyrite | $III$. $MgSO_4 \cdot H_2O$ |
| $D$. Diaspore | $IV$. $KAlSi_3O_8$ |
| $V$. $CaMg_3(SiO_3)_4$ |
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