The Amazing World of Solutes, Solvents, and Solutions — Practice

Q1. When a solid is mixed with a liquid to form a solution, the solid component is called the

• A. solvent
• B. solute
• C. suspension
• D. mixture

Q2. In a solution of salt in water, the liquid component (water) is called the

• A. solute
• B. mixture
• C. solid
• D. solvent

Q3. A mixture in which the components are distributed evenly throughout is called a

• A. non-uniform mixture
• B. suspension
• C. uniform mixture
• D. colloid

Q4. When chalk powder is mixed with water, the resulting mixture is

• A. a non-uniform mixture
• B. a uniform mixture
• C. a true solution
• D. a saturated solution

Q5. A solution in which no more solute can be dissolved at a given temperature is called

• A. a dilute solution
• B. an unsaturated solution
• C. a concentrated solution
• D. a saturated solution

Q6. The maximum amount of solute that dissolves in a fixed quantity of solvent at a particular temperature is called its

• A. solubility
• B. concentration
• C. density
• D. saturation

Q7. For most solids dissolved in a liquid, the solubility

• A. decreases with increase in temperature
• B. first increases, then decreases sharply
• C. stays exactly the same at all temperatures
• D. increases with increase in temperature

Q8. How does the solubility of gases in water change as the temperature of the water rises?

• A. It generally decreases
• B. It generally increases
• C. It stays unchanged
• D. It first decreases, then increases

Q9. Which of the following is the correct formula for density?

• A. Density = Volume × Mass
• B. Density = Volume / Mass
• C. Density = Mass + Volume
• D. Density = Mass / Volume

Q10. What is the SI unit of density?

• A. g/cm³
• B. kg/m³
• C. g/mL
• D. kg·m³

Q11. In Activity 9.2 of Chapter 9, baking soda is added to water. The chemical name of baking soda mentioned in the textbook is

• A. sodium chloride
• B. sodium hydroxide
• C. sodium carbonate
• D. sodium hydrogen carbonate

Q12. Priya measures the volume of water in a measuring cylinder. The curved upper surface of the water she sees is called the

• A. meniscus
• B. tare
• C. graduation
• D. displacement

Q13. Water has its highest density at a temperature of

• A. 0 °C
• B. 4 °C
• C. 20 °C
• D. 100 °C

Q14. Even though oxygen dissolves in water only to a small extent, this dissolved oxygen is important because it

• A. makes water taste sweet
• B. sustains aquatic life such as fishes and plants
• C. increases the density of water
• D. turns water into a saturated solution

Q15. The 'Ever heard of…' box in Chapter 9 mentions Gulab jamun chashni. In this sugar syrup, even though sugar is in larger amount, the textbook treats

• A. sugar as the solvent and water as the solute
• B. water as the solvent and sugar as the solute
• C. both as solvents in equal measure
• D. both as solutes since neither dominates