# Explain why graphite can be used as a lubricant.

> Cambridge International IGCSE Chemistry (0620) — 2.6 Giant covalent structures · Explain · 4 marks

> Graphite is a form of carbon with a giant covalent structure. It is used in industry as a dry lubricant in situations where liquid oils are unsuitable.

## Mark scheme (4 marks)

1. Graphite is arranged in layers
2. The layers can slide over each other
3. The forces between layers are weak
4. This allows surfaces to move past each other with little friction / reducing friction between surfaces

## Key terms

- [lubricant](https://www.gradenine.co.uk/glossary/lubricant)

## Related

- [Revision notes for Cambridge International IGCSE Chemistry (0620)](https://www.gradenine.co.uk/learn)
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