Question

Graphite is soft and generally used as a lubricant. Give reason.

Answer 1

Graphite is used as a lubricant due to its slippery nature. Graphite has layers of carbon atoms, with weak forces, residing in between its layers because of which it is quite slippery



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Answer 2

Graphite is a Covalent bond.
Each atom is bonded with 5 other atoms making a hexagonal ring. Moreover the rings of carbon are placed over each other and are bonded with Van Der Waals force. Hence it is used as a dry lubricant in machines as it can also sustain a high temperature.