Multiple choice

The inactive form of carbon is ____

  1. coal

  2. charoal

  3. diamond

  4. graphite

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Diamond is chemically the most inactive form of carbon due to its extremely strong sp³ tetrahedral bonds and lack of free electrons. It does not react with most acids, bases, or other chemicals under normal conditions. Coal and charcoal are amorphous and more reactive.