Multiple choice

Which among the following substances is used as a lubricant?

  1. Quartz

  2. Silica

  3. Graphite

  4. Nickel
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Graphite is widely used as a dry lubricant because its layered structure allows the layers to slide over each other easily, reducing friction between surfaces.

Keep practicing — related questions