Question detail

What property of graphite allows it to be used as a lubricant?

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

Structure and bonding of carbon

Question

A. Its high melting point.
B. Its ability to conduct electricity.
C. The layers can slide over each other easily.
D. It is a giant covalent structure.

Answer

The correct option is The layers can slide over each other easily.. This answer is correct because it matches the approved learning objective to explain why graphite conducts electricity in the subtopic Graphite.

Explanation

The correct option is The layers can slide over each other easily.. The layers can slide over each other easily. is correct because it directly supports the approved learning objective to explain why graphite conducts electricity. This belongs to the subtopic Graphite within Structure and bonding of carbon, 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 Graphite.

Common mistake

Misunderstanding Conductivity in Graphite

Students often state that graphite conducts electricity because it has free electrons, without specifying that these electrons are delocalised.

Emphasize that in graphite, one electron from each carbon atom is delocalised, allowing it to conduct electricity.

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