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Types of chemical reactions

Types of chemical reactions

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Question 10

In the industrial extraction of iron from its ore, carbon monoxide gas reacts with iron(III) oxide according to the following equation:

Fe2O3(s)+3CO(g)→2Fe(l)+3CO2(g) \text{Fe}_2\text{O}_3(\text{s}) + 3\text{CO}(\text{g}) \rightarrow 2\text{Fe}(\text{l}) + 3\text{CO}_2(\text{g}) Fe2​O3​(s)+3CO(g)→2Fe(l)+3CO2​(g)

Which statement correctly identifies the reducing agent in this reaction and explains its role in terms of electron transfer and oxidation states?

A

Fe2O3\text{Fe}_2\text{O}_3Fe2​O3​ is the reducing agent because iron gains electrons, and its oxidation state decreases from +3+3+3 to 000.

B

CO\text{CO}CO is the reducing agent because carbon gains electrons, and its oxidation state increases from +2+2+2 to +4+4+4.

C

CO\text{CO}CO is the reducing agent because carbon loses electrons, and its oxidation state increases from +2+2+2 to +4+4+4.

D

Fe2O3\text{Fe}_2\text{O}_3Fe2​O3​ is the reducing agent because it is reduced, and in doing so, it oxidises CO\text{CO}CO.

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Types of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Types of chemical reactions

55 exam-style questions on OCR GCSE Chemistry Types of chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.

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