Pure Substances (AQA GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
In chemistry, what is a pure substance?
In chemistry, what is a pure substance?
One with only one compound or element
What must chemically pure water contain?
What must chemically pure water contain?
Only H₂O molecules
At what temperature does a pure solid melt?
At what temperature does a pure solid melt?
Exactly at its melting point
What happens to the melting temperature of an impure solid?
What happens to the melting temperature of an impure solid?
It is lower than when pure
What is used to hold crystals during melting point analysis?
What is used to hold crystals during melting point analysis?
A capillary tube
At what temperature does a pure liquid boil?
At what temperature does a pure liquid boil?
Exactly at its boiling point
How does an impure liquid boil compared to a pure one?
How does an impure liquid boil compared to a pure one?
At a higher temperature
Which purity test is used for solids?
Which purity test is used for solids?
Melting point analysis
What is a formulation?
What is a formulation?
A purposeful mixture
What is special about the ingredients in a formulation?
What is special about the ingredients in a formulation?
They are carefully measured and mixed