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Class 9 · Chemistry · 6 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
Answer key
1. B, 2. D, 3. B, 4. A, 5. D, 6. D
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.