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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 correct product set is obtained by electrolysis of brine in the chlor-alkali process?Where is chlorine obtained in the chlor-alkali process?Where is hydrogen gas obtained in the chlor-alkali process?Why is plaster of Paris kept away from moisture?Gypsum forms plaster of Paris on controlled heating. What is the main change?Why should acid be slowly added to water while diluting an acid?Why does the acidic effect decrease when an acidic solution is diluted with water?If the pH value of an acidic solution increases but remains below seven, what does it mean?The temperature rises when equal amounts of acid and base are mixed. What is the reason?Phenolphthalein is pink in a basic solution. What does becoming colourless on adding acid indicate?Why does methyl orange show different colours in acidic and basic media?A solution conducts electricity well, but the same substance in dry state does not. What is the most suitable reason?How is carbon dioxide produced in a soda-acid fire extinguisher?Why can bubbles form when acid falls on marble?Why does acid rain slowly damage marble monuments?Why is baking soda applied for relief from the acidic substance in an ant sting?What type of substance would help reduce irritation caused by a nettle leaf sting?A student says that only water is formed when an acid and a base are mixed. Why is this answer incomplete?When zinc metal reacts with dilute sulphuric acid, which test is most suitable to identify the evolved gas?If a solution turns red litmus blue and phenolphthalein pink, what is the nature of the solution?