Question

Choose the correct statment for graphite :

• A. Graphite is used as a dry lubricant
• B. Each C atom in hexagonal ring make four sigma bonds with neighboring C atoms
• C. Electrons are immobile and localized over the whole sheet.
• D. All of the above.

Answer 1

The correct option is A Graphite is used as a dry lubricant

Graphite :
Graphite is used as a dry lubricant in machines running at high temperatures, where oil cannot be used as a lubricant.
Graphite cleaves easily between the layers; hence it is very soft and slippery.

Electrons are mobile and delocalized over the whole sheet therefore graphite conducts electricity along the sheet.

Each C atom in hexagonal ring make three sigma bonds with three neighboring C atoms and the fourth electron forms a $\pi$ bond.