Aluminium is extracted by electrolysis. Iron is extracted by reduction with carbon. Which row of the table explains both facts? A aluminium is more reactive than carbon carbon is more reactive than iron B aluminium is more reactive than carbon iron is more reactive than carbon C aluminium is more reactive than iron carbon is more reactive than iron D aluminium is more reactive than iron iron is more reactive than carbon

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Aluminium is extracted by electrolysis - OCR Gateway - GCSE Chemistry: Combined Science - Question 7 - 2019 - Paper 10

Question 7

Aluminium is extracted by electrolysis. Iron is extracted by reduction with carbon. Which row of the table explains both facts? A aluminium is more reactive than ... show full transcript

Worked Solution & Example Answer:Aluminium is extracted by electrolysis - OCR Gateway - GCSE Chemistry: Combined Science - Question 7 - 2019 - Paper 10

Step 1

aluminium is more reactive than carbon carbon is more reactive than iron

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Answer

This row indicates that aluminium is more reactive than carbon, which is consistent with the fact that aluminium is extracted by electrolysis. Since carbon cannot displace aluminium from its ore, this reactivity is necessary. However, it also states that carbon is more reactive than iron, which is not true based on reactivity series.

Step 2

aluminium is more reactive than carbon iron is more reactive than carbon

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Answer

This row is not accurate because while aluminium is indeed more reactive than carbon, it falsely states that iron is more reactive than carbon, which contradicts the typical reactivity series.

Step 3

aluminium is more reactive than iron carbon is more reactive than iron

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101 rated

Answer

This combination is also incorrect. Aluminium is more reactive than iron, but it incorrectly implies that carbon is more reactive than iron, which is not supported by their respective positions in the reactivity series.

Step 4

aluminium is more reactive than iron iron is more reactive than carbon

98%

120 rated

Answer

This row correctly states that aluminium is more reactive than iron, affirming the electrolysis method for extraction. Additionally, it correctly indicates that iron is more reactive than carbon, which aligns with the method of extracting iron via reduction with carbon.

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