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3.3 Types of chemical reactions

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Question 14

Magnesium is ignited in oxygen. The equation for the reaction is:

2Mg+O2→2MgO \mathrm{2Mg + O_2 \rightarrow 2MgO} 2Mg+O2​→2MgO

Statement 1: Oxygen is reduced.

Statement 2: Magnesium acts as the reducing agent.

Statement 3: Each magnesium atom gains two electrons.

Which statements are correct?

[1]
A

2 only

B

2 and 3 only

C

1 and 2 only

D

1 only

Markscheme

3.3 Types of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.3 Types of chemical reactions

112 exam-style questions on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one has a worked solution and a mark scheme showing where the marks go.

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