
Concept explainers
Interpretation: The reason for easier extraction of some metal from the ores is to be explained.
Concept introduction: The process of obtaining metals from ores inside the earth's crust is termed as metal extraction. Metal extraction depends on reactivity of metal.
Highly reactive metals (aluminium) results formation of stable oxides and many other compounds and to extract such metals

Answer to Problem SIV2RE
Some metals are easier to extract because of their less reactivity.
Explanation of Solution
Some metal elements have less reactivity such as iron. They form less stable oxides and other compounds. To extract these metals, reduction reaction with carbon is performed and requires less energy in extraction.
Some less reactive metals are found in pure forms in ores. In such case, removal of impurities is only needed. No
Less reactive metals are easier to extract than highly reactive metals.
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