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3.3 Types of chemical reactions

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Question 2
F

In which reaction is water acting as an oxidising agent?

[1]
A

Mg+H2O→MgO+H2\mathrm{Mg + H_{2}O \rightarrow MgO + H_{2}}Mg+H2​O→MgO+H2​

B

CuO+H2→Cu+H2O\mathrm{CuO + H_{2} \rightarrow Cu + H_{2}O}CuO+H2​→Cu+H2​O

C

CaO+H2O→Ca(OH)2\mathrm{CaO + H_{2}O \rightarrow Ca(OH)_{2}}CaO+H2​O→Ca(OH)2​

D

2H2+O2→2H2O\mathrm{2H_{2} + O_{2} \rightarrow 2H_{2}O}2H2​+O2​→2H2​O

Markscheme

3.3 Types of chemical reactions Questions

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

53 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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