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Solutions
6 Class 9 Chemistry questions with answers and explanations.
Printable worksheet with answer key
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In a solution of salt in water, water is the:
- 1 Solute
- 2 Solvent
- 3 Catalyst
- 4 Precipitate
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Correct answer: Solvent
The substance present in larger amount that dissolves the other is the solvent.
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A solution that cannot dissolve any more solute at a given temperature is called:
- 1 Dilute
- 2 Unsaturated
- 3 Colloidal
- 4 Saturated
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Correct answer: Saturated
A saturated solution holds the maximum amount of solute possible.
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The solubility of most solids in water generally:
- 1 Is not affected by temperature
- 2 Increases with temperature
- 3 Decreases with temperature
- 4 Becomes zero when heated
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Correct answer: Increases with temperature
For most solids, solubility rises as the water gets warmer.
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Milk is an example of a:
- 1 Colloid
- 2 Pure substance
- 3 True solution
- 4 Element
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Correct answer: Colloid
Milk has tiny droplets spread through a liquid, which makes it a colloid.
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Which of these is a suspension?
- 1 Air
- 2 Sugar in water
- 3 Salt water
- 4 Muddy water
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Correct answer: Muddy water
The particles in muddy water are large enough to settle on standing.
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10 g of salt is dissolved in 90 g of water. What is the percentage by mass of the solution?
- 1 9 percent
- 2 11 percent
- 3 90 percent
- 4 10 percent
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Correct answer: 10 percent
Mass of solution = 100 g, so percentage = 10 / 100 x 100 = 10 percent.