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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 is Plaster of Paris kept away from moisture?Why do blue copper sulphate crystals become white on heating?Why does white anhydrous copper sulphate turn blue again when water is added?What else is formed along with salt when hydrochloric acid reacts with sodium carbonate?Why does effervescence occur when acid is added to sodium hydrogen carbonate?A student added acid to a metal carbonate and passed the gas through lime water. What is the correct observation?What is the main harm when acidic waste is released directly into water bodies?How does acid rain damage marble buildings?Which statement about acids is the most correct?Which statement about bases is the most correct?Why can all alkalis be called bases, but all bases cannot be called alkalis?What is the colour of methyl orange in acidic solution and why is it useful?Which pair correctly matches an acid with its natural source?Which pair gives the correct salt and its use?Why are copper or brass vessels not considered suitable for storing sour substances in the kitchen?If blue litmus turns red in a solution and phenolphthalein remains colourless, what is the nature of the solution?How does the pH change when hydrochloric acid is gradually added to sodium hydroxide solution?Why does mixing equal volumes of an acid and a base not always produce a neutral solution?Which observation suggests that a base may be present in a solution?Why are bubbles formed when baking soda is added to lemon juice?