Year 9 Chemistry Jan 2025

What is a mixture?

• A substance made of only one element
• A substance with two or more elements mixed together
• A compound of fixed proportions
• A solid dissolved in a liquid

Which separation method is used for insoluble solids from liquids?

• Evaporation
• Filtration
• Chromatography
• Condensation

What is the liquid that passes through filter paper called?

• Residue
• Filtrate
• Distillate
• Solvent

Which of these is NOT a method to separate mixtures?

• Magnetism
• Filtration
• Oxidation
• Chromatography

What is the residue in filtration?

• The solid that passes through the filter
• The liquid that is filtered
• The solid that remains in the filter paper
• The gas produced during the process

What happens to a substance that dissolves completely in water?

• It forms a residue
• It becomes insoluble
• It forms a solution
• It forms a suspension

Which term is used for the substance that dissolves in a solvent?

• Solvent
• Solute
• Solution
• Filtrate

What does evaporation separate?

• Insoluble solids from liquids
• Soluble solids from liquids
• Liquids from gases
• Two immiscible liquids

What is the chemical name for rust?

• Iron oxide
• Hydrated iron (III) oxide
• Iron hydroxide
• Sodium oxide

Which of these is an exothermic reaction?

• Boiling water
• Burning magnesium ribbon
• Melting ice
• Dissolving ammonium chloride in water