1) What type of substance is used to neutralise an acid? a) Alkali b) Water c) Salt d) Metal 2) Which colour does universal indicator turn in a strong acid? a) Green b) Red c) Purple d) Blue 3) What is the pH of a neutral substance like pure water? a) 3 b) 7 c) 10 d) 14 4) Which of these is an alkali commonly used in cleaning products? a) Hydrochloric acid b) Sulfuric acid c) Sodium hydroxide d) Carbon dioxide 5) Which of these everyday substances is acidic? a) Soap b) Toothpaste c) Baking soda d) Lemon juice 6) A bee sting is acidic. What would help to relieve the sting? a) Vinegar b) Lemon juice c) Soap d) Bicarbonate of soda 7) What happens when an acid reacts with an alkali? a) A salt and water are made b) A gas is released c) A metal is produced d) Nothing happens 8) What colour does universal indicator turn in a strong alkali like oven cleaner? a) Red b) Yellow c) Green d) Purple 9) Which pH value is most likely for stomach acid? a) 1 b) 5 c) 7 d) 11 10) Farmers sometimes use lime (an alkali) to treat acidic soil. Why do they do this? a) To make the soil more acidic b) To neutralise the acid in the soil c) To make the soil less fertile d) To cool the temperature

pH Scale & Neutralisation MCQ

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