Chemistry GCSE
Pure Substance
What Pure Substance means in Chemistry GCSE, as defined for OCR, Pearson Edexcel.
Definitions of Pure Substance
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
A substance consisting of only one type of element or one type of compound, which melts and boils at specific, sharp temperatures.
A substance consisting of only one type of element or one type of compound.
Topics that use Pure Substance
- Topic C2: Elements, compounds and mixtures (OCR GCSE)
- States of matter and mixtures (Pearson Edexcel GCSE)
Related terms
Using Pure Substance in the exam
Definition questions usually carry one or two marks, and examiners look for the precise wording. Write the definition from memory, check it against the version above, and then use the term in a longer answer on the same topic so it sticks.
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