Question

1. which statement is true about mixtures?

a mixtures are always liquids.
b original components of mixtures retain(keep) their individual properties, and no new chemical bonds are formed
c mixtures form new chemical bonds (new substances)
d mixtures cannot be separated by physical means.

Explanation:

• Option A: Mixtures can be in solid, liquid, or gas states. For example, air (a mixture of gases), sand - water mixture (solid - liquid), and alloys (solid - solid mixtures). So, this option is wrong.
• Option B: In a mixture, the original components do not undergo a chemical reaction. So, they retain their individual properties and no new chemical bonds are formed. For example, in a mixture of salt and water, salt (NaCl) and water (\(H_2O\)) retain their properties. This option is correct.
• Option C: As mentioned above, mixtures do not form new chemical bonds. Chemical reactions (not mixtures) form new chemical bonds. So, this option is wrong.
• Option D: Mixtures can be separated by physical means. For example, filtration (separating sand from water), distillation (separating components of a liquid mixture based on boiling points). So, this option is wrong.

Answer:

B. Original components of mixtures retain(keep) their individual properties, and no new chemical bonds are formed