Question

Which of the following is used as a lubricant?
A.Graphite
B.Silica
C.Iron Oxide
D.Diamond

Answer 1

Graphite use as a lubricant

Answer 2

Graphite is used as a lubricant.

• The slippery substance is used extensively as a lubricant.
• Graphite has a loosely bounded C-C bond so, it is slippery and used as a lubricant.
• Silica, iron oxide and Diamond are hard solids and do not have slippery nature so, this is not used as lubricants.
• Thus the correct answer is A.
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