WBCS.LIVE practice question

Which allotrope of Carbon is used as a dry lubricant in heavy machinery due to its layered structure?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Diamond
  2. Fullerene
  3. Graphite
  4. Graphene

Correct answer and explanation

Correct answer: Graphite

Explanation: āœ… Correct Answer: C) Graphite šŸ“š Explanation: Graphite consists of carbon atoms arranged in hexagonal layers that are held together by weak Van der Waals forces. These layers can easily slide over each other, making the material feel slippery and reducing friction between moving metal parts. Unlike oil, graphite remains effective at high temperatures and does not evaporate in a vacuum.