1) What did we make our own indicator out of? a) blackberries b) red cabbage c) peppers d) strawberries 2) Which of these is NOT an ingredient in fizzy drinks? a) alkali b) acid c) gas d) sweeteners 3) What is this Hazchem symbol? a) Toxic b) Flammable c) Harmful to the environment d) Corrosive 4) What does this mean? a) Radioactive b) Irritant c) Toxic d) Corrosive 5) The pH of stomach acid is... a) 1 b) 4 c) 7 d) 13 6) What do antacids do? a) Dissolve food b) Add more stomach acid c) Neutralise excess stomach acid 7) How do antacids do this neutralising? a) They contain alkalis b) They contain acids 8) Neutralising an acid with an alkali will bring the pH closer to... a) 1 b) 4 c) 7 d) 14

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