Pure substances and formulations (AQA GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does a pure substance contain?
What does a pure substance contain?
Only one element or one compound
Which of these is an example of a pure substance?
Which of these is an example of a pure substance?
Water
What is a key characteristic of a pure substance's melting point?
What is a key characteristic of a pure substance's melting point?
It is sharp and at one exact temperature
What happens to temperature whilst a pure substance is melting?
What happens to temperature whilst a pure substance is melting?
It stays constant
A substance melts at 132-136°C but data books say 136°C. What does this indicate?
A substance melts at 132-136°C but data books say 136°C. What does this indicate?
The substance contains impurities
How do impure substances melt compared to pure ones?
How do impure substances melt compared to pure ones?
Over a range of temperatures
What does a wider melting range indicate?
What does a wider melting range indicate?
More impurities are present
What is a formulation?
What is a formulation?
A mixture designed for a specific job
What is true about components in a formulation?
What is true about components in a formulation?
Each serves a specific function
In paint, what is the purpose of pigments?
In paint, what is the purpose of pigments?
For colour
What happens if one component is removed from a formulation?
What happens if one component is removed from a formulation?
It won't work properly
Which method separates liquids with different boiling points?
Which method separates liquids with different boiling points?
Distillation