Question

station 3
mixtures
which of the following is true about mixtures?
a. mixtures are pure and cannot be broken down.
b. substances in mixtures keep their unique properties.
c. mixtures are two or more substances that have chemically combined.
d. the substances in a mixture cannot be separated.
q1

Explanation:

• Option A: Mixtures are not pure. Pure substances are either elements or compounds. Mixtures can be separated into their components, so this option is incorrect.
• Option B: In a mixture, each substance retains its own unique properties. For example, in a mixture of salt and sand, salt is still soluble in water and sand is still insoluble. This option is correct.
• Option C: Mixtures are physical combinations of substances. Compounds are substances where two or more elements are chemically combined. So this option is incorrect.
• Option D: Mixtures can be separated by physical methods such as filtration, evaporation, distillation etc. So this option is incorrect.

Answer:

B. Substances in mixtures keep their unique properties.