1) What is a mixture? a) A substance made of one element b) Two or more substances mingled together but not chemically combined. c) A substance that cannot be separated d) A pure substance 2) Which of the following is a mixture? a) Oxygen b) Water c) Air d) Gold 3) Which method is used to separate sand from water? a) Evaporation b) Chromatography c) Filtration d) Magnetism 4) What piece of equipment is needed for filtration? a) Thermometer b) Filter funnel c) Bunsen burner d) Test tube 5) What is the name of the liquid that passes through the filter paper? a) Residue b) Solvent c) Filtrate d) Solution 6) What remains on the filter paper after filtration? a) Filtrate b) Solvent c) Residue d) Solution 7) Which method is used to separate salt from salt water a) Filtration b) Chromatography c) Evaporation d) Magnetism 8) Which property is used in evaporation to separate mixtures? a) Colour b) Magnetism c) Solubility d) Boiling point 9) What solvent is usually used in paper chromatography? a) Oil b) Water c) Acid d) Alcohol 10) Why must the ink spot be above the solvent level in chromatography? a) To stop it dissolving too quickly b) To make it darker c) To make it move faster d) To prevent it washing off the paper 11) Which method is used to separate two liquids with different boiling points? a) Distillation b) Evaporation c) Filtration d) Chromatography 12) Which piece of equipment is used to heat a solution? a) Balance b) Hot Plate c) Microscope d) Filter Paper 13) What does the term soluble mean? a) Can be filtered b) Can be evaporated c) Can dissolve in water d) Can be separated by a magnet 14) Which mixture cannot be separated by filtration? a) Sand and water b) Chalk and water c) Mud and water d) Salt and water 15) Why is evaporation not suitable if you want to collect the water? a) The water is destroyed b) The water escapes as a gas c) The salt melts d) The solution cools 16) What safety equipment should be worn when heating substances? a) Gloves only b) Safety goggles c) Apron only d) None 17) What happens if filter paper has a hole in it? a) Filtration works faster b) The filtrate becomes purer c) The residue passes through d) Nothing changes 18) Which statement about chromatography is correct? a) It separates solids from liquids b) It uses magnetism c) It separates substances based on colour and movement d) It requires heating 19) Which method could be used to separate seawater to obtain drinking water? a) Filtration b) Evaporation only c) Chromatography d) Distillation

Separating Mixtures

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