Edexcel IGCSE Chemistry elements, compounds and mixtures
Practise mixtures questions by classifying formulae or diagrams, choosing separation methods and using chromatogram distances or spots.
- Syllabus
- First assessment 2019
- Course
- Chemistry 4CH1
Exam points
- Classify elements, compounds and mixtures from formulae, names or particle diagrams.
- Choose filtration, crystallisation, distillation or chromatography for a named mixture.
- Interpret chromatogram spots and calculate Rf from dye and solvent-front distances.
Covered syllabus points
(b) Elements, compounds and mixtures question 1
This question is about gases.
Question (a)
(a)
The table gives information about five gases.
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 ]
(b) Elements, compounds and mixtures question 2
A student has two solids, X and Y .
One of these solids is a pure substance and the other is a mixture.
Describe how the student could identify which solid is pure and which is a mixture by measuring a physical property of each solid.
(b) Elements, compounds and mixtures question 3
This question is about apparatus used in the laboratory.
The diagram shows apparatus used to obtain pure water from sodium chloride solution by simple distillation.
Explain why it is necessary for water to flow continuously in and out of the apparatus.
All question bank results loaded