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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

Why can acid rain be harmful to aquatic organisms?In which direction does pH move when water is added to an acidic solution?In which direction does pH move when water is added to a basic solution?If a solution conducts electricity, what may be present in it?Why does aqueous sodium chloride conduct electricity even though it is neutral?Why should acids or bases not be identified by taste in a laboratory?If blue litmus turns red in a colourless solution, which ion is likely to be in excess in that solution?In a solution red litmus turns blue and turmeric becomes reddish-brown. What is the nature of the solution?A solution with pH 5 will be considered what type of solution?A solution with pH 9 will be considered what type of solution?What is the usual pH of a neutral solution?What colour does universal indicator show in a neutral solution?What nature is indicated by red colour in universal indicator?What nature is indicated by violet colour in universal indicator?How is the gas formed by reaction of an acid with an active metal identified?The gas released by reaction of an acid with carbonate turns lime water milky. Which gas is it?Milkiness of lime water occurs due to formation of which substance?Why can excess carbon dioxide remove the milkiness of lime water?What main substances are formed in the reaction between an acid and a base?Which ions combine to form water during neutralisation?