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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

The formula of washing soda shows sodium carbonate decahydrate. What does the word decahydrate indicate?Why does adding washing soda to hard water help in washing?Why does the blue colour return when water is added to white copper sulphate?Which statement about water of crystallisation is correct?Which substance is formed when gypsum is heated at about 373 K?Why is plaster of Paris stored away from moisture?On what can the pH of a salt depend?Why is an aqueous solution of sodium chloride nearly neutral?What is the usual nature of an aqueous solution of ammonium chloride?What is the usual nature of an aqueous solution of sodium carbonate?Why are non-metal oxides called acidic oxides?Metal oxides react with acids to form salt and water. What nature does this prove?In an acid-base reaction, if an indicator stops changing colour, what condition may it indicate?On what basis do olfactory indicators help identify acids and bases?Onion juice is an example of which type of indicator?If phenolphthalein remains colourless in a solution, which conclusion is the most careful one?What colour does methyl orange generally show in a basic solution?A solution turns blue litmus red and releases gas with a metal carbonate. What type of solution is it?When a small amount of acid is mixed with water, the amount of which ion increases in the solution?If a small amount of base is dissolved in water, in which direction will the pH of the solution move?