1) What is the pH number if the substance is neutral? a) 3 b) 6 c) 7 d) 8 2) What is the pH number if the substance is very acidic? a) 4 b) 1 c) 5 d) 14 e) 12 3) What substance is the most acidic? a) Water b) Tea c) Soap d) Salt water e) Lemonade 4) Which substance is the most alkaline? a) Soap b) Water c) Milk d) Lime juice e) Sodium chloride 5) What colour does pH paper show when it is dipped in Acid? a) Red b) Purple c) Blue d) Green 6) What colour does pH paper turn into when it is dipped in neutral substances? a) Blue b) Green c) Red d) Purple e) Pink 7) what colour does pH paper change into when it is dipped into strong alkaline substances? a) Red b) Green c) Blue d) Pink e) Purple 8) what colour does pH paper change into when it is dipped into strong alkaline substances? a) Sulfuric acid b) Phosphoric acid c) red d) purple e) pink 9) When an acid is neutralised a) The pH stays the same b) The pH decreases c) The temperature decreases d) The pH increases 10) Which of the following is an example of an acid? a) Oven cleaner b) Ammonia c) Vinegar d) Baking soda e) Salt water 11) The neutralisation of a strong acid and strong alkaline has a pH equal to? a) 9 b) 2 c) 5 d) 7 12) What is NOT a product of a neutralisation reaction? a) PH 7 b) Acid c) Salt d) Water 13) What is harmed by acid rain? a) Cars b) People c) Trees d) Plastic 14) Which of the statements is correct about increasing the rate of reaction a) Increasing the particle size b) Decreasing the temperature c) Decreasing the surface area d) Increasing the concentration 15) Which of these gases can make acid rain? a) Nicotine b) Nitrogen c) Oxygen d) Sulphur dioxide 16) What is the main cause of acid rain? a) Oil slicks at sea b) Burning fossil fuels c) Using Renewable energy d) Breathing out carbon dioxide 

Chemical Reactions

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