Lesson T3.1.2
T3.1.2 Mixtures and dissolving Quiz: KS3 Chemistry, Unit 3
20 questions
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Lesson T3.1.2, Mixtures and dissolving: 20 multiple choice questions for the KS3 Chemistry (National Curriculum), Unit 3: Pure and impure substances, written with Revision Ninja.
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The 20 questions
-
What is formed when a solute dissolves completely in a solvent?
- A precipitate
- An element
- A suspension
- A solution
-
Which is the solvent in salt water?
- Water
- Sodium chloride crystals
- Salt
- Chlorine gas
-
Which substance is the solute when sugar is dissolved in tea?
- Milk
- Sugar
- Tea
- Water
-
Where do solute particles go when a solid dissolves in liquid?
- Spread among solvent
- Evaporate away
- React chemically
- Sink to bottom
-
Why does sugar dissolve faster in warmer water than cold water?
- Larger sugar crystals
- Thicker water
- Less frequent collisions
- More particle energy
-
Which substance is NOT an example of a chemical mixture?
- Air
- Sea water
- Rock salt
- Distilled water
-
Which of these can be dissolved in water to make a solution?
- Chalk
- Iron filings
- Sand
- Salt
-
What is formed when sand is added to water and does not dissolve?
- A compound
- An alloy
- A suspension
- A solution
-
What is formed when coffee granules dissolve completely in hot water?
- A solution
- An emulsion
- An element
- A suspension
-
Why do dissolving solids appear to vanish in a liquid?
- Solid turns to gas
- Particles break down
- Liquid absorbs atoms
- Particles too small
-
Which mixture contains particles that eventually settle out at the bottom?
- Salt solution
- Sugar solution
- Muddy water
- Vinegar
-
What process leaves salt crystals behind when a salt solution is left open?
- Freezing
- Evaporation
- Melting
- Condensation
-
Which word describes a substance that dissolves in a solvent?
- A catalyst
- A residue
- A solute
- A solvent
-
Why is a mixture of sugar and water classified as a solution?
- Sugar forms a precipitate
- Water is saturated
- Evenly spread sugar
- Sugar reacts chemically
-
Which action increases how quickly a solid dissolves in a liquid?
- Freezing
- Cooling
- Stirring
- Covering
-
What term describes a solution that cannot dissolve any more solute at that temperature?
- Pure
- Dilute
- Saturated
- Concentrated
-
What happens to the total mass of salt and water when salt dissolves?
- Increases
- Disappears
- Stays the same
- Decreases
-
Which method is used to separate an insoluble solid from a liquid?
- Evaporating
- Filtering
- Melting
- Condensing
-
A student dissolves 10 g of salt in 100 cm³ of water. What is the water here?
- The product
- The solvent
- The solute
- The residue
-
What is the greatest mass of solute that can dissolve in a fixed volume of solvent at a set temperature?
- Density
- Boiling point
- Solubility
- Melting point
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