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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 observation provides experimental evidence that an acidic solution contains ions?Which pair correctly lists products obtained from common salt in the chlor-alkali process?Why is limewater useful for identifying carbon dioxide in the laboratory?If an unknown salt solution has pH 9, what is its most probable formation condition?What happens to hydrogen-ion concentration when water is added to an acidic solution?Why can the purity of sodium hydroxide decrease when it is left exposed to air?The formation of only salt and water in an acid-base reaction best represents which idea?Which substance is used to disinfect drinking water and can release chlorine?Which treatment is most logical to get relief from the acid present in an ant sting?A colourless solution conducts electricity, but the dry substance does not affect litmus. What condition is necessary for acidic behaviour?Which option contains a group of acidic substances?Which option contains a group of basic substances?An acid reacts with a metal to produce a gas that gives a pop sound near a burning splint. Which gas is it?Why is sodium carbonate used to soften hard water?If pH is less than 7 but not very close to zero, what is the most balanced conclusion about the solution?A dilute acid is added to a white solid, producing a gas that turns lime water milky. What could the white solid be?Why can acid rain water be harmful for aquatic organisms?A student says all salts are neutral. Which answer correctly evaluates this statement?An unknown solution turns red litmus blue and forms a white precipitate when carbon dioxide is passed through it. Which substance is most likely present in the solution?A student takes equal amounts of two acids. The first ionises completely and the second ionises partially. Which is more likely to have a lower pH?