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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

Four solutions have pH values 2, 6, 7 and 12. Which one is the most basic?Four solutions have pH values 1, 4, 8 and 13. Which one is the most acidic?When milk turns sour, in which direction does its pH change?Among tomato juice, soap solution, pure water and baking soda solution, which substance will be neutral?A bee sting contains an acidic substance. Which substance is suitable to reduce its pain?Which type of substance is useful to reduce the acidic effect of a nettle sting?In which condition may plant roots face difficulty in absorbing nutrients from soil?If field soil is highly acidic, what happens when lime is added to it?Why is toothpaste generally made mildly basic for tooth protection?How does a medicine like magnesium hydroxide help when excess acid is produced in the stomach?Aqueous sodium chloride solution is the starting material for which industrial process?Which base remains in the solution after the chlor-alkali process?What is one major use of chlorine obtained in the chlor-alkali process?One use of hydrogen obtained in the chlor-alkali process is in which of the following?Sodium hydroxide is used in which of the following industries?Which gas is passed over dry slaked lime in the preparation of bleaching powder?Why is bleaching powder used to remove colour from coloured substances?Which main gaseous product is formed when baking soda is heated?What is the main difference between baking soda and baking powder?Why can excess use of only baking soda give a bitter taste to cake?