Four groups are given linking a metal, its or | vedclass

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(D) Let us evaluate each group:$(1)$ Iron - Magnetite - $Fe_{3}O_{4}$: This is correct. Magnetite is an oxide ore of iron with the formula $Fe_{3}O_{4

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$(1)$ and $(3)$

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(D) Let us evaluate each group:$(1)$ Iron - Magnetite - $Fe_{3}O_{4}$: This is correct. Magnetite is an oxide ore of iron with the formula $Fe_{3}O_{4}$.$(2)$ Iron - Siderite - $FeS_{2}$: This is incorrect. Siderite is $FeCO_{3}$. $FeS_{2}$ is Iron Pyrites.$(3)$ Copper - Copper glance - $Cu_{2}S$: This is correct. Copper glance (Chalcocite) is a sulfide ore of copper with the formula $Cu_{2}S$.$(4)$ Copper - Dolomite - $Al_{2}O_{3}$: This is incorrect. Dolomite is $CaCO_{3} \cdot MgCO_{3}$. $Al_{2}O_{3}$ is Corundum (an ore of Aluminum).Therefore, only groups $(1)$ and $(3)$ are correct.

Four groups are given linking a metal, its ore, and the chemical formula of the main component of the ore. How many of these are correct?
$(1)$ Iron - Magnetite - $Fe_{3}O_{4}$
$(2)$ Iron - Siderite - $FeS_{2}$
$(3)$ Copper - Copper glance - $Cu_{2}S$
$(4)$ Copper - Dolomite - $Al_{2}O_{3}$

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Four groups are given linking a metal, its ore, and the chemical formula of the main component of the ore. How many of these are correct?$(1)$ Iron - Magnetite - $Fe_{3}O_{4}$$(2)$ Iron - Siderite - $FeS_{2}$$(3)$ Copper - Copper glance - $Cu_{2}S$$(4)$ Copper - Dolomite - $Al_{2}O_{3}$