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Edexcel IGCSE Chemistry 1.8 Elements Compounds and Mixtures Questions

Practise classification questions by counting elements in formulae, explaining compounds and separating mixtures from pure substances.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • Count different elements in a formula such as Al2(SO4)3 or copper(II) hydroxide.
  • Explain compounds as different elements chemically bonded together in fixed ratios.
  • Distinguish mixtures from compounds using bonding, formulae or particle diagrams.

Edexcel IGCSE Chemistry 1.8 Elements Compounds and Mixtures Questions question 1

[Maximum number: 2]

This question is about gases.

Question (a)

(a)

The table gives information about five gases.

Table for Question (a) — Edexcel IGCSE Chemistry

Use information from the table to answer these questions.
Each gas may be used once, more than once or not at all.

[ 2 ]

Question (i)

(i)

Give the name of the gas that is a compound.

[ 1 ]

Question (ii)

(ii)

Give a reason why it is not possible to give information for air in the table.

[ 1 ]
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