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Which of the following metals is sometimes found native in nature?

Which metal is found in free state?

Match the following ores with their compositions:
$A$. Calamine$i$. $CuFeS_2$
$B$. Chalcopyrite$ii$. $ZnCO_3$
$C$. Bauxite$iii$. $Fe_2O_3$
$D$. Haematite$iv$. $Al_2O_3 \cdot 2H_2O$

Which one is malachite from the following?

Most abundant metal in earth's crust is

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