Mixtures and Pure Substances — Prelims Questions

Which of the following statements correctly distinguishes between a compound and a mixture?

Which of the following is a heterogeneous mixture?

Which of the following properties is characteristic of a pure substance?

Which of the following separation techniques would be most effective for separating a mixture of iron filings and sulfur powder?

Which of the following statements about colloids is INCORRECT?

A student mixes $5\,\text{g}$ of common salt ($NaCl$) with $100\,\text{mL}$ of water. Which of the following statements is TRUE regarding the resulting mixture?