Question

Matter with definite and constant composition and distinct chemical properties is known as:

• A. element
• B. mixture
• C. pure substance
• D. impure substance

Answer 1

The correct option is C

pure substance

The matter with definite and constant composition and distinct chemical properties is known as a pure substance.
This basically means that the composition and properties of this matter are fixed and constant throughout the space it is spread.
A pure substance can be further classified as elements and compounds. Mixtures are impure substances, which does not have definite and constant composition.