Question

Carbon is used as abrasive as well as a __________.

• A. drying agent
• B. lubricant
• C. explosive
• D. none of these

Answer 1

Answer: (B)

lubricant

A drying agent is a chemical that is used to remove water from a substance. But carbon is not used as a drying agent or as an explosive.

Due to different allotropic forms of carbon, it is used as an abrasive as well as lubricant. Graphite is the allotrophic form of carbon that is used as a lubricant. Diamond is another allotropic form of carbon that is very hard and, hence it makes an excellent abrasive. So option B is correct.