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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

Which property of bleaching powder makes it useful for whitening clothes?Magnesium produces a gas when added to an acidic solution. If sodium carbonate is added to the same solution, which other gas will be released?An aqueous acid solution conducts electricity, but the pure acid conducts poorly. What does this observation support?Which option is most appropriate for the safe storage of acids and bases?If plant growth is poor in acidic soil, which substance can be carefully used to improve its pH?A student says that pH zero means there is no acid. What is the correct evaluation?How does the gas formed when sodium hydrogen carbonate reacts with an acid help food rise?If the amounts of hydrogen ions and hydroxide ions in a solution are nearly balanced, what will its pH be like?Which substance dissolves in water to form a basic solution and also releases carbon dioxide with an acid?Why is the gas formed by adding a metal to an acid not obtained with every metal?A substance dissolves in water, turns red litmus blue, and feels soapy. Which ion will mainly be present?If a salt is obtained from seawater and used to make chlorine and sodium hydroxide, which common salt is it?A little base is added to an acidic solution, so pH increases but complete neutralisation does not occur. Why?In an experiment, dry litmus is unaffected, but the same gas changes moist litmus colour. What is the best conclusion?Which statement correctly differentiates the uses of baking soda and washing soda?If a student says acids are always dangerous and bases are always safe, what is the correct response?Of two colourless solutions, the first gives a gas with magnesium and the second turns red litmus blue. What is the correct identification?A solution gives green colour with universal indicator. When a small amount of acid is added, the colour becomes yellow. What does this show?If the pH of a solution is brought from 11 close to 7, which ion is being effectively reduced?What is the main reason for the different effect of dry hydrogen chloride and moist hydrogen chloride on litmus?