JAMB Chemistry questions: Separation of mixtures and purification

24 questions with answers and explanations. Tap an option to check yourself.

All topics Acids, bases and salts · 32 Air · 21 Atomic structure and bonding · 33 Chemical combination · 31 Chemical equilibrium · 21 Chemistry and industry · 18 Electrolysis · 22 Energy changes · 22 Environmental pollution · 17 Kinetic theory of matter and gas laws · 27 Metals and their compounds · 24 Non-metals and their compounds · 23 Organic compounds · 43 Oxidation and reduction · 22 Rates of chemical reaction · 22 Separation of mixtures and purification · 24 Solubility · 20 Water · 21

Question 1· Separation of mixtures and purification· JAMB
Ethanol (boiling point 78 °C) can be separated from water by
Explanation and discussion
Question 2· Separation of mixtures and purification· JAMB
The purest sample of common salt is obtained from sea water by
Explanation and discussion
Question 3· Separation of mixtures and purification· JAMB
A pure solid can be identified by its
Explanation and discussion
Question 4· Separation of mixtures and purification· JAMB
A mixture of iodine crystals and sand is best separated by
Explanation and discussion
Question 5· Separation of mixtures and purification· JAMB
Which method is best for obtaining pure water from sea water?
Explanation and discussion
Question 6· Separation of mixtures and purification· JAMB
Blue copper(II) tetraoxosulphate(VI) crystals are obtained by crystallisation rather than by evaporating to dryness because
Explanation and discussion
Question 7· Separation of mixtures and purification· JAMB
Steam distillation is used to separate substances that are
Explanation and discussion
Question 8· Separation of mixtures and purification· JAMB
A pure liquid can be identified by its
Explanation and discussion
Question 9· Separation of mixtures and purification· JAMB
The apparatus shown is used to separate
Explanation and discussion
Question 10· Separation of mixtures and purification· JAMB
The purity of a solid sample can be tested by finding its
Explanation and discussion
Question 11· Separation of mixtures and purification· JAMB
A mixture of ammonium chloride and sodium chloride is best separated by
Explanation and discussion
Question 12· Separation of mixtures and purification· JAMB
Two spots that travel the same distance on a chromatogram under the same conditions are probably
Explanation and discussion
Question 13· Separation of mixtures and purification· JAMB
Centrifugation is used to separate
Explanation and discussion
Question 14· Separation of mixtures and purification· JAMB
Two immiscible liquids such as oil and water are separated with a
Explanation and discussion
Question 15· Separation of mixtures and purification· JAMB
The chromatogram shows a mixture X and three pure dyes P, Q and R. Mixture X contains
Explanation and discussion
Question 16· Separation of mixtures and purification· JAMB
The coloured components of ink are best separated by
Explanation and discussion
Question 17· Separation of mixtures and purification· JAMB
Which method is most suitable for separating a mixture of sand and salt?
Explanation and discussion
Question 18· Separation of mixtures and purification· JAMB
Chromatography separates components of a mixture on the basis of their:
Explanation and discussion
Question 19· Separation of mixtures and purification· JAMB
In fractional distillation, the liquid that distils over first is the one with the
Explanation and discussion
Question 20· Separation of mixtures and purification· JAMB
A mixture of iron filings and sulphur powder is best separated by
Explanation and discussion

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JAMB Chemistry questions: Separation of mixtures and purification

Ethanol (boiling point 78 °C) can be separated from water by

The purest sample of common salt is obtained from sea water by

A pure solid can be identified by its

A mixture of iodine crystals and sand is best separated by

Which method is best for obtaining pure water from sea water?

Blue copper(II) tetraoxosulphate(VI) crystals are obtained by crystallisation rather than by evaporating to dryness because

Steam distillation is used to separate substances that are

A pure liquid can be identified by its

The apparatus shown is used to separate

The purity of a solid sample can be tested by finding its

A mixture of ammonium chloride and sodium chloride is best separated by

Two spots that travel the same distance on a chromatogram under the same conditions are probably

Centrifugation is used to separate

Two immiscible liquids such as oil and water are separated with a

The chromatogram shows a mixture X and three pure dyes P, Q and R. Mixture X contains

The coloured components of ink are best separated by

Which method is most suitable for separating a mixture of sand and salt?

Chromatography separates components of a mixture on the basis of their:

In fractional distillation, the liquid that distils over first is the one with the

A mixture of iron filings and sulphur powder is best separated by