Multiple choice

Which of the following is used as a lubricant?

  1. Graphite

  2. Silica

  3. Diamond

  4. Iron oxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Graphite has a layered structure where weak van der Waals forces exist between layers. This allows layers to slide over each other easily, making graphite an excellent solid lubricant.

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