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Elements, compounds and mixtures

Elements, compounds and mixtures

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Question 15

Techniques used in the separation of mixtures include:

A crystallisation

B filtration

C fractional distillation

D simple distillation

For each separation, select the most suitable technique, A, B, C or D, used to obtain the first named substance from the mixture. Each letter may be used once, more than once or not at all.

a.

Pure water from a sodium chloride solution

[1]
b.

Crude oil fractions (such as petrol and kerosene) from crude oil

[1]
c.

Sand from a mixture of sand and water

[1]
d.

Solid potassium nitrate crystals, KNO3(s)\text{KNO}_3(\text{s})KNO3​(s), from an aqueous solution of potassium nitrate, KNO3(aq)\text{KNO}_3(\text{aq})KNO3​(aq)

[1]
Markscheme

Elements, compounds and mixtures Questions

  1. IGCSE
  2. /Chemistry
  3. /Elements, compounds and mixtures

29 exam-style questions on Edexcel IGCSE Chemistry Elements, compounds and mixtures. Each one has a worked solution and a mark scheme showing where the marks go.

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