KS3 Chemistry: Solutions and Separation Techniques

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Test your knowledge on solutions, solubility, and other separation techniques in chemistry!

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Luca

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KS3 Chemistry: Solutions and Separation Techniques


Froggy Jumps KS3 Chemistry: Solutions and Separation TechniquesVersion en ligne Test your knowledge on solutions, solubility, and other separation techniques in chemistry! par Luca 1 State what a solution is. a A reaction between acids and alkalis that produces salt and water. b A solution is a mixture that separates over time and doesn’t stay evenly mixed. c A solution is a mixture of a liquid with a soild or gas. 2 What is a solute? a The substance that does the dissolving in a solution. b The substance that dissolves in another substance. c The substance that is always liquid in a solution. 3 What is a solvent? a The substance that dissolves in another substance. b The substance that does the dissolving in a solution. c The substance that is always solid in a solution. 4 Identify the solute in a coffee solution. a Water b Coffee powder c Sugar 5 Describe the arrangement of particles in a solution. a Solute particles are in rows, and solvent particles are scattered. b The solvent particles surround and move around the solute particles, which are arranged randomly. c Both solute and solvent particles are arranged in an orderly pattern and do not move around. 6 Which solvent dissolves nail varnish (a liquid used to colour and protect nails)? a Water b Propanone (a colourless, flammable liquid used as a solvent in industries like paint). c Vinegar 7 What happens when you open a fizzy drink? a The gas dissolves more into the liquid. b The gas leaves the solution. c The liquid becomes solid. 8 How can rice and beans be used to model particles in a solution? a Rice represents solute particles, and beans represent solvent particles. b Rice represents solvent particles, and beans represent solute particles. c Rice and beans both represent solvent particles. 9 What is a saturated solution? a A solution that contains only a small amount of solute b A solution where no more solute can dissolve and some remains undissolved c A solution that evaporates quickly 10 What does the term “solubility” mean? a How fast a substance melts b The mass of solute that dissolves in 100 g of water c How well a substance conducts electricity 11 Which statement is correct about sugar and salt solubility at 20 °C? a Salt is more soluble than sugar b Sugar and salt dissolve equally c Sugar is more soluble than salt 12 How does temperature usually affect solubility? a Solubility decreases with temperature b Solubility stays the same c Solubility increases with temperature 13 Which of these substances is insoluble in water? a Sugar b Sand c Salt 14 Which salt is described as one of the most soluble at 20 °C? a Calcium carbonate b Potassium nitrate c Sodium chloride 15 Why is sugar more soluble than salt at room temperature? a Sugar has smaller particles that dissolve more easily b Sugar forms stronger bonds with water molecules than salt does c Salt turns into gas when mixed with water 16 Why does increasing the temperature increase solubility? a Higher temperatures give particles more energy to break apart and spread b Heat causes the solute to disappear c Cold water can hold more solute than hot water 17 What does filtration separate? a Two liquids b A liquid from a dissolved solid c A liquid from an insoluble solid 18 What do we call the liquid that passes through the filter paper? a Residue b Filtrate c Solvent 19 Martha filters a mixture of glitter and water. What is the residue? a The glitter b The water c The filter paper 20 Why does sand stay in the filter paper during filtration? a Sand dissolves in water b Sand particles are too small to pass through c Sand particles are too large to pass through 21 Which of the following is not a use of filtration? a Removing dirt from car oil b Separating coffee grounds from coffee c Mixing sugar into tea 22 Sandeep finds solid zinc sulfate left in the beaker after stirring. What should he do next to measure solubility? a Heat the solution until it evaporates b Use filtration to separate the solid and measure its mass c Add more water to the mixture 23 Why is filtration useful when separating a sand and salt mixture? a Both salt and sand dissolve in water b Salt forms large crystals that can be filtered c Sand is insoluble and stays as the residue after filtering 24 What is the purpose of the filter paper in the filtration process? a To dissolve the solid particles in the mixture b To allow both the liquid and solid to pass through c To separate the insoluble solid from the liquid 25 How can salt be separated from seawater? a By using a filter to separate the solid salt from the liquid b By using distillation to evaporate the water and collect the salt c By using evaporation to leave the salt behind as the water evaporates 26 Which of the following is NOT a use of evaporation? a Forming copper sulfate crystals b Separating the solvent from nail varnish remover c Making sea salt from seawater 27 Why do larger crystals of copper sulfate form when evaporation occurs slowly? a The water evaporates quickly, leaving behind small crystals b The slow evaporation allows for more time for the crystals to grow c The solvent cools down quickly, causing the crystals to form 28 What happens during distillation to separate the solvent from the solution? a The solvent evaporates, leaving the solute behind, then condenses to form pure solvent b The solution is filtered to separate the solvent from the solute c The solvent freezes, leaving the solute behind 29 Why does a large body of water take longer to evaporate compared to a smaller body of water? a The larger body of water has more surface area, which speeds up evaporation b The larger body of water holds more heat, which slows down evaporation c The larger body of water requires more energy to reach its boiling point, which delays evaporation 30 Which of the following substances can be separated using distillation? a Salt from seawater b Sugar from water c Sand from water 31 Why is distillation used to obtain drinking water from seawater in places like Saudi Arabia? a Distillation filters out bacteria and impurities, making the water safe to drink b Distillation dissolves salt into the water, making it drinkable c Distillation evaporates water, leaving salt behind and collects the pure water 32 Which method would you use to obtain pure water from a mixture of water and ink? a Evaporation b Distillation c Filtration 33 What is distillation? a A method to separate solids from liquids by filtration b A process used to separate a solvent from a solution using evaporation and condensation c A technique used to dissolve solid substances into liquids 34 What is evaporation? a The process of a liquid turning into a gas without boiling, typically when heat is applied b The process of a liquid turning into a solid when cooled c The process of separating a solid from a liquid by filtration

KS3 Chemistry: Solutions and Separation Techniques

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KS3 Chemistry: Solutions and Separation TechniquesVersion en ligne

par Luca

State what a solution is.

What is a solute?

What is a solvent?

Identify the solute in a coffee solution.

Describe the arrangement of particles in a solution.

Which solvent dissolves nail varnish (a liquid used to colour and protect nails)?

What happens when you open a fizzy drink?

How can rice and beans be used to model particles in a solution?

What is a saturated solution?

What does the term “solubility” mean?

Which statement is correct about sugar and salt solubility at 20 °C?

How does temperature usually affect solubility?

Which of these substances is insoluble in water?

Which salt is described as one of the most soluble at 20 °C?

Why is sugar more soluble than salt at room temperature?

Why does increasing the temperature increase solubility?

What does filtration separate?

What do we call the liquid that passes through the filter paper?

Martha filters a mixture of glitter and water. What is the residue?

Why does sand stay in the filter paper during filtration?

Which of the following is not a use of filtration?

Sandeep finds solid zinc sulfate left in the beaker after stirring. What should he do next to measure solubility?

Why is filtration useful when separating a sand and salt mixture?

What is the purpose of the filter paper in the filtration process?

How can salt be separated from seawater?

Which of the following is NOT a use of evaporation?

Why do larger crystals of copper sulfate form when evaporation occurs slowly?

What happens during distillation to separate the solvent from the solution?

Why does a large body of water take longer to evaporate compared to a smaller body of water?

Which of the following substances can be separated using distillation?

Why is distillation used to obtain drinking water from seawater in places like Saudi Arabia?

Which method would you use to obtain pure water from a mixture of water and ink?

What is distillation?

What is evaporation?