Question

1. which statement is true about mixtures?

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

Explanation:

• Option A: Mixtures can be separated by physical means like filtration, distillation etc. So this option is wrong.
• Option B: Mixtures can be in solid (e.g., a mixture of sand and salt), liquid (e.g., salt - water solution) or gaseous (e.g., air) state. So this option is wrong.
• Option C: In a mixture, the original components retain their individual properties and no new chemical bonds are formed. For example, in a mixture of iron filings and sulfur powder, iron has magnetic property and sulfur does not, and there is no chemical reaction between them. This option is correct.
• Option D: Mixtures do not form new chemical bonds. Compounds form new chemical bonds. So this option is wrong.

Answer:

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