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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 does foam form when baking soda and vinegar are mixed?Which substance is used to disinfect water because it can provide chlorine?Which substance is used for bleaching clothes and wood pulp?A student says all salts are neutral. Which example disproves this statement?In a reaction, mixing an acid and a base increases the solution temperature. How should this be understood?Which observation gives the strongest evidence that ions are present in a solution?Methyl orange turns red in an acidic solution. If enough base is added to the same solution, in which direction will the color change?Why are acidic solutions able to conduct electric current?Which solution is most likely to have the highest concentration of hydrogen ions?Why may an acid show little effect on an indicator if water is absent?An acid reacts with a metal carbonate to give a gas. Why can the milkiness disappear when that gas is passed through lime water for a long time?A student passed the gas evolved from zinc and dilute acid into lime water. No milkiness appeared. What is the correct conclusion?Why does effervescence occur when sodium hydrogen carbonate is mixed with an acid?Which statement shows that all bases are not soluble in water?Which experiment proves that hydrogen chloride shows acidic properties after dissolving in water?Which salt solution is more likely to show acidic nature in water?Which salt solution is more likely to show basic nature in water?Why is sodium chloride solution considered neutral?How many molecules of water of crystallisation are present in washing soda?What is the amount of water per unit of calcium sulphate in plaster of Paris?