Question

Which substance is formed by the carbonization of dead vegetation?

• A. coal
• B. coke
• C. coal gas
• D. coal tar

Answer 1

The correct option is A

coal

The explanation for the correct option :

Option A Coal:

• The carbonization of dead vegetation produces coal.
• Due to high pressure and warmth. The dead plants that were buried beneath the earth 300 -350 million years ago were transformed into it.

The explanation for the incorrect options:

Option B Coke

• Coal is heated at high temperatures and for a very long time to generate coke.
• The term "thermal distillation" or "pyrolysis" refers to this heating.

Option C Coal gas :

• When coal is processed, coal gas, a mixture of methane, hydrogen, and some carbon dioxide, is created.
• It is also a man-made substance like coke.

Option D Coal tar :

• In combination with coke, coal is destructively distilled in coking ovens to produce coal tar, a liquid mixture of hydrocarbon (viscous) molecules.
• It is also formed from coal like coke and coal tar.
• Thus, Option A Coal is the correct option.