Question

How is charcoal prepared?

• A. When wood is heated with cow dung and CO₂ then the residue is charcoal.
• B. When wood is boiled in water, after evaporation the residue is charcoal.
• C. When wood is burnt in a limited supply of oxygen & water until volatile materials are removed, the residue is charcoal.
• D. All of these.

Answer 1

The correct option is C

When wood is burnt in a limited supply of oxygen & water until volatile materials are removed, the residue is charcoal.

When wood is burnt in a limited supply of oxygen and water until volatile materials are removed, the residue left is charcoal.