Question detail

Which of the following statements is true about the properties of low density poly(ethene)?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Using materials

Question

A. It is more rigid and less flexible than high density poly(ethene)
B. It has a higher melting point than high density poly(ethene)
C. It is softer and more flexible than high density poly(ethene)
D. It is produced from ethene at high temperatures and low pressures

Answer

The correct option is It is softer and more flexible than high density poly(ethene). This answer is correct because it matches the approved learning objective to explain how low density and high density poly(ethene) can both be produced from ethene under different conditions. (Chemistry only) in the subtopic Ceramics, polymers and composites.

Explanation

The correct option is It is softer and more flexible than high density poly(ethene). It is softer and more flexible than high density poly(ethene) is correct because it directly supports the approved learning objective to explain how low density and high density poly(ethene) can both be produced from ethene under different conditions. (Chemistry only). This belongs to the subtopic Ceramics, polymers and composites within Using materials, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Ceramics, polymers and composites.

Common mistake

Confusing Poly(ethene) Types

Students often confuse the production processes of low density and high density poly(ethene), thinking they are produced under the same conditions.

Remember that low density poly(ethene) is produced at high temperatures and pressures, while high density poly(ethene) is produced at lower temperatures and pressures with a different catalyst.

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