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3.3 Types of chemical reactions

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Question 3
F

Chromium can be made by heating chromium(III) oxide with aluminium powder.

2Al+Cr2O3→Al2O3+2Cr \mathrm{2Al + Cr_{2}O_{3} \rightarrow Al_{2}O_{3} + 2Cr} 2Al+Cr2​O3​→Al2​O3​+2Cr

Statement 1: Aluminium is the reducing agent.

Statement 2: Chromium(III) oxide is oxidised.

Statement 3: Chromium(III) oxide is the oxidising agent.

Which statements are correct?

[1]
A

1 only

B

2 only

C

1 and 3 only

D

2 and 3 only

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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