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WorksheetsN4 Chemistry
Total questions: 10
Worksheet time: 6mins
Which element cannot be extracted from its ore by reduction with carbon?
iron
aluminium
copper
zinc
What is the name of the process that uses electricity to separate the elements in a compound?
reduction
electrolysis
extraction
mining
How would you best extract iron from haematite (iron ore)?
reduction by carbon
electrolysis
decomposition
oxidation
What are the three essential elements that plants require?
nitrogen phosphate potassium
nitrogen sulphur potassium
nitrogen potassium phosphorous
nitrogen potassium polonium
Which of the following would be a suitable fertiliser?
nitrogen dioxide
potassium nitrate
copper phosphate
nitrogen oxide
It is made of long chains of molecules.
Atoms
Elements
Polymers
Gelatin
A plastic that can be reheated and shaped is called
Thermoplastic
Thermosetting Plastic
