Ceramics, polymers, composites (AQA GCSE Chemistry): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What process gives ceramics their unique properties of hardness and heat resistance?
What process gives ceramics their unique properties of hardness and heat resistance?
Heating at very high temperatures
Which three substances are heated together to make soda-lime glass?
Which three substances are heated together to make soda-lime glass?
Sand, sodium carbonate, limestone
Why is borosilicate glass better than ordinary glass for laboratory equipment?
Why is borosilicate glass better than ordinary glass for laboratory equipment?
It handles sudden temperature changes
Which of these is an example of a clay ceramic?
Which of these is an example of a clay ceramic?
Pottery
What are composites?
What are composites?
Materials combining two substances
In fibreglass, what provides the strength?
In fibreglass, what provides the strength?
The glass fibres
Why are carbon fibre composites used in racing cars and aircraft?
Why are carbon fibre composites used in racing cars and aircraft?
They are very strong and lightweight
What holds the cellulose fibres together in wood?
What holds the cellulose fibres together in wood?
A lignin matrix
Why do thermosoftening polymers soften when heated?
Why do thermosoftening polymers soften when heated?
Weak intermolecular forces weaken
What feature prevents thermosetting polymers from softening when heated?
What feature prevents thermosetting polymers from softening when heated?
Cross-links between chains
What is the useful temperature of HDPE compared to LDPE?
What is the useful temperature of HDPE compared to LDPE?
Higher (around 110°C)
Why is HDPE better than LDPE for hot drink cups?
Why is HDPE better than LDPE for hot drink cups?
It handles higher temperatures