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Solutions
Class 9 · Chemistry · 10 questions
Name: ____________________ Date: ____________
In a solution of salt in water, water is the:
- A Solute
- B Solvent
- C Catalyst
- D Precipitate
A solution that cannot dissolve any more solute at a given temperature is called:
- A Dilute
- B Unsaturated
- C Colloidal
- D Saturated
The solubility of most solids in water generally:
- A Is not affected by temperature
- B Increases with temperature
- C Decreases with temperature
- D Becomes zero when heated
Milk is an example of a:
- A Colloid
- B Pure substance
- C True solution
- D Element
Which of these is a suspension?
- A Air
- B Sugar in water
- C Salt water
- D Muddy water
10 g of salt is dissolved in 90 g of water. What is the percentage by mass of the solution?
- A 9 percent
- B 11 percent
- C 90 percent
- D 10 percent
A solution contains 5 g of sugar in 100 g of solution. Its mass percentage is:
- A 0.5 percent
- B 20 percent
- C 5 percent
- D 50 percent
An aqueous solution is one in which the solvent is:
- A Water
- B Oil
- C Alcohol
- D Air
The particles of a true solution:
- A Cannot be seen and do not settle
- B Settle on standing
- C Scatter light strongly
- D Can be filtered out
Which of these is a solid dissolved in a liquid?
- A Air
- B Soda water
- C Sugar in water
- D Brass
Answer key
1. B, 2. D, 3. B, 4. A, 5. D, 6. D, 7. C, 8. A, 9. A, 10. C
The substance present in larger amount that dissolves the other is the solvent.
A saturated solution holds the maximum amount of solute possible.
For most solids, solubility rises as the water gets warmer.
Milk has tiny droplets spread through a liquid, which makes it a colloid.
The particles in muddy water are large enough to settle on standing.
Mass of solution = 100 g, so percentage = 10 / 100 x 100 = 10 percent.
5 / 100 x 100 = 5 percent.
Aqueous means in water.
True solutions are clear and stable.
Sugar is a solid dissolved in water.