1) What is the pH of acids? a) 7 or below b) Below 7 2) What pH number does a neutral substance have? a) 7 b) 10 3) What pH number would a red colour with pH paper indicate? a) 1 or 2 b) 5 or 6 4) What colour would be neutral with pH paper? a) Green b) Blue 5) What is the highest number on the pH scale a) 10 b) 14 6) What range of pH numbers are for alkalis? a) Above 7 b) 7 or more 7) Which pH is the most acidic? a) 3 b) 4 8) Which pH is the most alkaline? a) 10 b) 11 9) What happens to the pH of an acid when it is diluted? a) It decreases b) It increases 10) What happens to the pH of an alkali when it is diluted? a) It decreases b) It increases

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