Question

A substance is heated in the absence of air and this results in the decomposition of the substance bearing a carbon –rich residue. This process is known as ___________.

• A. carbonization
• B. destructive distillation
• C. allotropes
• D. catenation

Answer 1

The correct option is B destructive distillation

When a substance is heated in the absence of air, it decomposes to give a carbon rich residue and this process is called destructive distillation.
Due to very high temperature and pressure on Earth, the carbon becames compact to form stony residue called coal. This process of converting wood into coal is called as carbonization.
Catenation is the unique property of carbon to form long chains.
Allotropes is defined as the existence of two or more different physical forms of the same chemical element.