Iron can be extracted through smelting. 

Choose 1 answer

True

False

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Why can carbon not be used to extract magnesium from its ore containing magnesium oxide?

Choose 1 answer

because magnesium is lower than carbon in the reactivity series

because magnesium oxide is a powerful explosive

because magnesium is higher than carbon in the reactivity series

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What reaction takes place in a blast furnace? 

Choose 1 answer

iron oxide + heat -> iron + oxygen

iron oxide + carbon -> iron + carbon dioxide

iron + oxygen -> iron + carbon dioxide

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Answer incorrect

Look at the slide below to work out the answer.