Question

which is a powderd form of a lubricant:
i) chalk
ii) salt
iii) sugar
iv) graphite​

Answer 1

Answer:graphite.................

Explanation:archaically referred to as plumbago, is a crystalline form of the element carbon with its atoms arranged in a hexagonal structure. It occurs naturally in this form and is the most stable form of carbon under standard conditions. Under high pressures and temperatures it converts to diamond.