JAMB and WAEC Chemistry questions: Separation of mixtures and purification

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

All topics Acids, bases and salts · 58 Air · 37 Atomic structure and bonding · 59 Chemical combination · 58 Chemical equilibrium · 37 Chemistry and industry · 35 Electrolysis · 41 Energy changes · 38 Environmental pollution · 32 Kinetic theory of matter and gas laws · 45 Metals and their compounds · 47 Non-metals and their compounds · 45 Organic compounds · 72 Oxidation and reduction · 41 Rates of chemical reaction · 38 Separation of mixtures and purification · 42 Solubility · 36 Water · 39

Question 21· Separation of mixtures and purification· JAMB
A mixture of ammonium chloride and sodium chloride is best separated by
Explanation and discussion
Question 22· 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 23· Separation of mixtures and purification· WAEC
Iodine can be separated from a mixture with sand by
Explanation and discussion
Question 24· Separation of mixtures and purification· JAMB
Centrifugation is used to separate
Explanation and discussion
Question 25· Separation of mixtures and purification· JAMB
Two immiscible liquids such as oil and water are separated with a
Explanation and discussion
Question 26· 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 27· Separation of mixtures and purification· JAMB
The coloured components of ink are best separated by
Explanation and discussion
Question 28· Separation of mixtures and purification· JAMB
Which method is most suitable for separating a mixture of sand and salt?
Explanation and discussion
Question 29· Separation of mixtures and purification· JAMB
Chromatography separates components of a mixture on the basis of their:
Explanation and discussion
Question 30· Separation of mixtures and purification· WAEC
A mixture of iodine crystals and sand can best be separated by
Explanation and discussion
Question 31· Separation of mixtures and purification· JAMB
In fractional distillation, the liquid that distils over first is the one with the
Explanation and discussion
Question 32· Separation of mixtures and purification· WAEC
A pure substance has
Explanation and discussion
Question 33· Separation of mixtures and purification· WAEC
Which method recovers solid salt from brine collected at a salt lake?
Explanation and discussion
Question 34· Separation of mixtures and purification· WAEC
Iodine can be separated from sand by
Explanation and discussion
Question 35· Separation of mixtures and purification· JAMB
A mixture of iron filings and sulphur powder is best separated by
Explanation and discussion
Question 36· Separation of mixtures and purification· WAEC
Kerosene and water poured into one container form two layers. Which apparatus separates them most simply?
Explanation and discussion
Question 37· Separation of mixtures and purification· JAMB
Which of the following is a physical change?
Explanation and discussion
Question 38· Separation of mixtures and purification· WAEC
Which method is best for separating a mixture of ethanol and water?
Explanation and discussion
Question 39· Separation of mixtures and purification· WAEC
In paper chromatography, the component that travels furthest is the one that is
Explanation and discussion
Question 40· Separation of mixtures and purification· JAMB
The components of liquid air are separated by fractional distillation because they have different
Explanation and discussion

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JAMB and WAEC Chemistry questions: Separation of mixtures and purification

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

Iodine can be separated from a mixture with sand by

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:

A mixture of iodine crystals and sand can best be separated by

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

A pure substance has

Which method recovers solid salt from brine collected at a salt lake?

Iodine can be separated from sand by

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

Kerosene and water poured into one container form two layers. Which apparatus separates them most simply?

Which of the following is a physical change?

Which method is best for separating a mixture of ethanol and water?

In paper chromatography, the component that travels furthest is the one that is

The components of liquid air are separated by fractional distillation because they have different