1) Which of these is the test for Hydrogen a) Relights a glowing splint b) Burns with a squeaky pop c) Turns limewater cloudy d) Unreactive to these tests 2) Which of these is the test for Oxygen a) Relights a glowing splint b) Burns with a squeaky pop c) Turns limewater cloudy d) Unreactive to these tests 3) Which of these is the test for Carbon Dioxide a) Relights a glowing splint b) Burns with a squeaky pop c) Turns limewater cloudy d) Unreactive to these tests 4) Which of these is the test for Nitrogen a) Relights a glowing splint b) Burns with a squeaky pop c) Turns limewater cloudy d) Unreactive to these tests 5) What gas makes up appoximately 78% of the air a) Hydrogen b) Nitrogen c) Oxygen d) Carbon Dioxide 6) If you add water to a solution it will become more... a) Concentrated b) Dilute c) Acidic d) Alkaline 7) Which of these is not a sign that a chemical reaction has taken place a) Gas given off b) Change in colour c) Solid formed d) Temperature change e) State Change f) Combustion 8) Which of these is a chemical change a) Frying an egg b) Melting plastic c) Chopping wood d) water freezing 9) Which of these is a physical change a) Toasting bread b) Milk turning sour c) Petrol burning d) Water evaporating 10) What effect does decreasing the particle size have on the reaction speed? a) Increases reaction speed b) Decreases reaction speed c) No effect on reaction speed 11) What effect does decreasing the concentration have on the reaction speed? a) Increases reaction speed b) Decreases reaction speed c) No effect on reaction speed 12) What effect does increasing the temperature have on the reaction speed? a) Increases reaction speed b) Decreases reaction speed c) No effect on reaction speed 13) What effect does using a catalyst have on the reaction speed? a) Increases reaction speed b) Decreases reaction speed c) No effect on reaction speed 14) What is an enzyme? a) Chemical used to show colour in a reaction b) A biological catalyst c) Indicates the reaction speed d) A chemical used only in school 15) Which of these is an example of an enzyme a) Amylase b) Manganese dioxide c) Iron filings d) Hydrogen Peroxide

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