2954454
Descrição
Quiz por raquelpuyuelo, atualizado more than 1 year ago
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Criado por raquelpuyuelo
mais de 9 anos atrás
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Questão 1
Questão
The MAIN raw material to make plastics is....?
Responda
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carbon
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oil, petroleum
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cellulose
Questão 2
Questão
Which of the following is/are the reasons of using plastics?
Responda
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They are cheap
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They can be moulded into different shapes easily
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They are very heavy
Questão 3
Questão
Which of the following statements about plastics is correct?
Responda
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There are no cross-links between polymer chains in thermosetting plastics
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Thermoplastics are biodegradable
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Polyester is a thermoplastic that is usually used to make shirts
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Compression moulding is usually used to mould thermoplastics
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