Question

Which of the following best matches the characteristics of mixtures?

• A. Initial components can be recovered only by a chemical change
• B. Properties are different from the inital components
• C. Fixed composition
• D. Variable composition and its initial components can be recovered by a physical change

Answer 1

The correct option is D

Variable composition and its initial components can be recovered by a physical change

The constituents in a mixture can be present in any ratio. A mixture of sand and salt can be in a ratio of 1:2 or 1:3 by weight.
The properties of mixture depends on its constituents. For example: The properties of air depends on the properties of nitrogen, oxygen, carbon dioxide and other gases.