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Subjects

Science

Acids, Bases, and Salts

अम्ल, क्षारक और लवण

In Class 10 Science, under the chapter Chemical Substances – Nature and Behaviour, students study acids, bases, and salts through their properties, reactions, and everyday examples. The topic explains how these substances behave with indicators and with one another, including neutralisation, and introduces the formation and practical importance of common salts.

Practice questions

Why does an aqueous solution of an acid conduct electricity?Which of the following substances forms a neutral solution when dissolved in water?What is the correct and safe method for mixing an acid with water?The dilution of an acid by adding it to water is generally what type of process?What is the usual pH of acid rain?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?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?A student places blue litmus paper in an acidic solution. What colour will the litmus paper become?Which salt is used to remove the permanent hardness of hard water?A student says that an antacid medicine used to reduce stomach acidity should be acidic. What is the correct correction to this statement?Which substance is heated to prepare plaster of Paris?What does plaster of Paris change into when water is added to it?For which purpose is bleaching powder generally used?Which aqueous solution is electrolysed in the chlor-alkali process?A student is diluting concentrated sulphuric acid. Which method reduces the risk of splashing caused by the heat produced?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?Tooth decay may begin when the pH falls below which value?Toothpaste is generally of which nature, helping it reduce acids present in the mouth?Which medicine provides relief from excess acidity in the stomach?Which of the following can be applied to reduce the irritation caused by a nettle sting?