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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

A salt solution shows pH 7 and conducts electricity. It may be an example of which type of salt?In electrolysis of brine, which product is formed at the anode and what is one use of it?Why does applying a mild basic substance give relief when an ant sting contains an acidic substance?If turmeric turns reddish-brown and phenolphthalein turns pink in a solution, what is the nature of the solution?An acid and a base are mixed in equal volumes, but the pH does not become 7. Which reason is most possible?Magnesium gives brisk bubbles with an acid, but copper does not. What is the reason?Which substance can be used both for removing colour in the textile industry and for disinfecting water?If a basic solution is diluted with water, in which direction will its pH move?Which product obtained from common salt is useful in soap and paper industries?Carbon dioxide is passed into a solution. Milkiness appears first and then disappears. Which substance causes the initial milkiness?A student says every salt solution is neutral. Which example will disprove this statement?Why does pH increase when hydroxide ions are added to an acidic solution?What risk may occur when curd is stored in a copper vessel?If adding water to an acidic solution changes its pH from 2 to 3, what happens to acidity?Which pair is not correct?If blue litmus turns red in a solution and bubbles form when carbonate is added, which conclusion is correct?An aqueous solution of a substance shows pH 13. Why is it unsafe to touch it directly?A salt formed by an acid-base reaction gives an acidic solution. What does this indicate about the parent substances?Universal indicator gives blue colour in a solution. After adding acid, the colour becomes green. What does this mean?A student says carbon dioxide is only a gas, so it has no relation with acids and bases. What is the correct correction?