1. Graphite
  2. Sodium
  3. Lithium
  4. Zinc
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1 Answers

Option 1 : Graphite

  • Graphite is widely used as a solid lubricant.
  • Graphite is crystalline, low density, and soft allotrope of carbon.
  • Graphite is composed of loosely bound sheets of carbon atoms, giving it lubricating texture which makes it an effective lubricating agent.
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