Purity, Formulations & Chromatography (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
In chemistry, what does 'pure' mean for a substance?
In chemistry, what does 'pure' mean for a substance?
Contains only one compound or element
What must chemically pure water contain?
What must chemically pure water contain?
Only molecules
Which method tests the purity of a solid?
Which method tests the purity of a solid?
Melting point analysis
What equipment holds the solid during melting point analysis?
What equipment holds the solid during melting point analysis?
Capillary tube
How does a pure substance melt?
How does a pure substance melt?
Exactly at its melting point
At what temperature does an impure solid melt compared to a pure one?
At what temperature does an impure solid melt compared to a pure one?
At a lower temperature
How does an impure solid melt?
How does an impure solid melt?
Over a range of temperatures
How does a pure liquid boil?
How does a pure liquid boil?
Exactly at its boiling point
At what temperature does an impure liquid boil compared to a pure one?
At what temperature does an impure liquid boil compared to a pure one?
At a higher temperature
What are formulations?
What are formulations?
Purposeful mixtures
Which is an example of a formulation?
Which is an example of a formulation?
Pain relief tablet
Which field especially needs purity testing?
Which field especially needs purity testing?
Medicine