Question

Which of the following property/properties do not describe a compound?

• A. It is a pure substance
• B. It is composed of two or more elements
• C. It is mixed in any proportion by mass
• D. It has unique properties as compared to its constituents

Answer 1

Answer: (C), (D)

The correct options are
C

It is mixed in any proportion by mass

D

It has unique properties as compared to its constituents

A compound is a substance formed when two or more elements are chemically bonded together and has the following properties:

1. It is a pure substance.
2. It is composed of two or more elements which are chemically combined in a fixed ratio by mass.
3. It has unique properties that are distinct from the properties of its elemental constituents. For example, water consists of hydrogen and oxygen. Hydrogen is combustible and oxygen is a supporter of combustion, but water is used as a fire extinguisher.