Multiple choice

Diamond because of its hardness has numerous industrial use. The substance that is alternatively used in place of diamond is

  1. quartz

  2. graphite

  3. lead

  4. silicon carbide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Silicon carbide (carborundum) is extremely hard and is the primary industrial alternative to diamond for abrasive and cutting applications. Graphite is soft and used as a lubricant, lead is soft, and quartz is hard but not as effective as silicon carbide for industrial abrasives.

Keep practicing — related questions