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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

If a substance solution feels soapy and turns red litmus blue, what type is it?A universal indicator shows orange colour in a solution. What could be the nature of the solution?A universal indicator shows violet colour in a solution. What does this indicate?When water is added to an acidic solution, the number of hydrogen ions per unit volume decreases. What will be the effect on pH?When water is added to a basic solution, the number of hydroxide ions per unit volume decreases. What will be the effect on pH?Which pair will react to form salt, water and carbon dioxide?Which pair will mainly form salt and water, but gas is not necessarily formed?Which pair reacts to form a salt and hydrogen gas?If a solution has pH less than 7 and releases gas with a metal carbonate, what could the solution be?If a solution turns red litmus blue and shows pH 10, what is the most correct conclusion?A solution turns blue litmus red and gives a colourless gas with zinc metal. Which ion will mainly be present in this solution?Why is it considered dangerous to add water to acid during dilution?If the pH of a solution increases from 3 to 6, what happens to its acidity?Why does dry hydrogen chloride gas not affect dry litmus paper?A student added dilute acid to sodium carbonate and passed the gas into lime water. Milkiness appeared first and then disappeared on passing excess gas. What is the correct reason?If a salt is formed from a strong acid and a weak base, how will its aqueous solution generally be?Which of the following pairs is correctly matched?Among hydrochloric acid and ethanoic acid of equal concentration, which acid shows higher electrical conductivity and why?What main products are formed when both metal carbonates and metal hydrogen carbonates react with acids?Which substance is scientifically suitable to reduce the pain caused by a bee sting?