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 Form 2 Chemistry questions and answers on structure and bonding

In terms of structure and bonding, explain why graphite is used as a lubricant in machines.

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Answer Text:
Graphite has a giant atomic structure which consist of hexagonal layers that are held by weak van der Waal’s forces. The layers therefore can easily slide over each other making graphite slippery. This enables graphite to act as a lubricant to reduce friction between moving parts of machine.