Question

Which of the following are not compounds?

• A. Potassium chloride
• B. Carbon monoxide
• C. Iron sulphide
• D. Sulphur powder

Answer 1

The correct option is D Sulphur powder

A compound is a substance formed when two or more chemical elements are chemically bonded together.

Potassium chloride is a chemical compound, metal halide salt composed of potassium and chlorine.

Carbon mono oxide, gas was identified as a compound containing carbon and oxygen.

Iron sulphide is a chemical compound composed of iron and sulphur.

Sulphur is an element found in black powder form.

Hence. option D is correct.