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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

If two acidic solutions have pH values 2 and 4 respectively, which one has a higher concentration of hydrogen ions?If a basic solution has pH 13, in which direction will it change when water is added?In a solution, blue litmus turns red, but red litmus shows no change. What is the nature of the solution?In a solution, red litmus turns blue, but blue litmus shows no change. What type of solution is it?Phenolphthalein turns pink and methyl orange turns yellow in a solution. What is the nature of this solution?The gas formed in an acid and metal carbonate reaction can make lime water clear again when passed in excess. What is the reason?A metal and an acid react to form a salt and hydrogen gas. If the metal is magnesium and the acid is sulphuric acid, which salt will be formed?Which substance will react with an acid to give carbon dioxide instead of hydrogen?Which substance is most suitable for treating acidic soil?Which substance can be added to basic soil so that acidic substances may gradually form?The condition that damages tooth enamel is related to which of the following?An antacid taken for excess stomach acid works on which principle?Why can sodium hydrogen carbonate be used in fire extinguishers?What is the main benefit of adding a mild edible acid with baking soda in baking powder?How does washing soda help in softening hard water?Due to which property is bleaching powder used in water purification?Which process is used to obtain sodium hydroxide from common salt?Which is the correct group of three main products obtained in the chlor-alkali process?If a salt solution has no effect on either blue or red litmus paper, what may be its approximate pH?An aqueous solution of ammonium chloride can turn blue litmus red. What is the reason?