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Class 10 · Science · Easy
→Which of the following salts is formed from a strong acid and a strong base and has an aqueous solution that is approximately neutral (pH 7 )?
Class 10 · Science · Easy
→A student suggests applying lemon juice to relieve the burning caused by an ant sting. Which substance would be more appropriate instead?
Class 10 · Science · Easy
→Which acid is mainly present in vinegar?
Class 10 · Science · Easy
→Which of the following can be applied to reduce the irritation caused by a nettle sting?
Class 10 · Science · Easy
→Which medicine provides relief from excess acidity in the stomach?
Class 10 · Science · Easy
→Toothpaste is generally of which nature, helping it reduce acids present in the mouth?
Class 10 · Science · Easy
→Tooth decay may begin when the pH falls below which value?
Class 10 · Science · Easy
→Which of the following salts is formed by the neutralisation of a strong acid and a strong base and generally has a neutral aqueous solution?
Class 10 · Science · Easy
→A student is diluting concentrated sulphuric acid. Which method reduces the risk of splashing caused by the heat produced?
Class 10 · Science · Easy
→Which aqueous solution is electrolysed in the chlor-alkali process?
Class 10 · Science · Easy
→For which purpose is bleaching powder generally used?
Class 10 · Science · Easy
→What does plaster of Paris change into when water is added to it?
Class 10 · Science · Easy
→Which substance is heated to prepare plaster of Paris?
Class 10 · Science · Easy
→A student says that an antacid medicine used to reduce stomach acidity should be acidic. What is the correct correction to this statement?
Class 10 · Science · Easy
→Which salt is used to remove the permanent hardness of hard water?
Class 10 · Science · Easy
→A student places blue litmus paper in an acidic solution. What colour will the litmus paper become?
Class 10 · Science · Easy
→A student placed dry hydrogen chloride gas and dry blue litmus paper in a closed jar. The litmus showed no colour change. What is the correct reason for this observation?
Class 10 · Science · Easy
→Tooth decay may begin when the pH in the mouth falls below 5.5. Which type of toothpaste is most suitable for cleaning teeth in this situation?
Class 10 · Science · Easy
→What is the usual pH of acid rain?
Class 10 · Science · Easy
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