Identifying the Viscous Liquid from Destructive Distillation

Destructive distillation involves heating organic material in the absence of air. This process breaks down complex molecules into simpler substances.

Understanding the Distillation Product

The process yields various products, including gases, liquids, and solids. Among the liquid products, a thick, viscous, dark liquid is commonly formed.

• Tar: This is the term for the viscous, black or dark brown liquid obtained from the destructive distillation of organic materials like coal or wood. It's a complex mixture of hydrocarbons and other organic compounds.

Evaluating Other Options

Let's look at why the other options are not suitable:

• Paint: Paint is a mixture used for coating surfaces, typically consisting of pigment, binder, and solvent. It is not a direct product of destructive distillation.
• Slag: Slag is a vitreous (glass-like) residue that forms during smelting or refining of metals. It is primarily inorganic and unrelated to organic material distillation.

Therefore, the viscous liquid obtained is correctly identified as tar.