Why is graphite used as a lubricant?

Graphite consists of layers of bonded carbon atoms. Each layer is made up of hexagonally bonded carbon atoms.The forces of attraction between these layers are weak van der Waals forces.Due to this, these layers can slide over each other and thus graphite can be use as lubricant.

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 it is non reactive

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because of its chemical structure .in wich,the carbon atoms are arranged in such manner that they can slide easily over each oth 

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it is soft and slippery

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to reduce the friiction among the moving parts of the machine

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 graphite is used as a lubricant, due to its soft and slippery nature, so that friction is reduced among the moving parts of the vehicle

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it is soft and slippery

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