1) What does this hazard symbol mean? a) Corrosive b) Irritant c) Flammable d) Toxic 2) What does this hazard symbol mean? a) corrosive b) hardmful/irritant c) toxic d) flammable 3) What hazard symbol would you give to a concentrated acid? a) flammable b) toxic c) corrosive d) harmful 4) What hazard symbol would you give to a dilute acid? a) Irritant b) Harmful c) Corrozive d) Toxic e) Flammable 5) What is the pH of a weak acid a) 1 b) 2 c) 3 d) 4 e) 5 f) 6 6) What is the pH of a strong acid? a) 1 b) 2 c) 7 d) 13 e) 14 7) What is the pH of pure water a) 1 b) 2 c) 4 d) 7 e) 9 f) 10 8) What is the pH of bleach a) 1 b) 3 c) 7 d) 8 e) 14 9) What indicator can tell us a chemicals pH a) cabbage water b) litmus paper c) universal indicator 10) What is made when an acid and alkali react? a) salt and hydrogen b) salt and water c) salt and carbon dioxide d) salt and pepper 11) When acid and alkalis react we call it .... a) ...combustion b) ...precipitation c) ....neutralisation 12) A chemical turns red using universal indicator is it.... a) acid b) alkali c) neutral 13) A chemical turns purple using universal indicatoris it.... a) acid b) alkali c) neutral 14) When acids and metals react what gas is produced? a) oxygen b) carbon dioxide c) hydrogen 15) Which of the following the most reactive metal? a) copper b) aluminium c) magnesium d) iron 16) Which is not a chemical change? a) Colour change b) Temperature change c) Changing state d) Forming a solid e) Giving of a gas 17) Which is not a physical change? a) Solid to liquid b) Freezing c) liquid to gas d) producing heat 18) In this demo what are the reactants? a) Magnesium and oxygen b) Magnesium oxide c) Magnesium only d) Oxygen only 19) What were the products? a) Magnesium Oxide b) Carbon dioxide 20) What is not needed for a fire? a) Fuel b) Oxygen c) Carbon dioxide d) Heat 21) What is a product of a combustion reaction? a) oxygen b) methane c) carbon dioxide d) water 22) What is a test for carbon dioxide gas? a) Turns lime water cloudy b) pop test c) turns lime water clear

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