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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

Which gas is produced when sodium hydrogen carbonate NaHCO₃ is heated?Which of the following substances produces hydroxide ions \(OH^-\) when dissolved in water?Which of the following salts forms a neutral aqueous solution?Which substance should a farmer add to acidic soil to reduce its acidity?A student tests an aqueous solution with a universal indicator and observes a green colour. The student says that the solution is acidic. What is the correct correction to this statement?Which gas is formed at the cathode in the chlor alkali process?A student chooses a substance to relieve acidity by neutralising excess hydrochloric acid in the stomach. Which of the following is suitable?Acid rain is generally considered to have pH below which value?Which of the following salts is known to form a neutral solution in water?How can organic matter help improve basic soil?What happens to the colour of moist blue litmus paper when it is exposed to hydrogen chloride gas?What colour does methyl orange become in a basic solution?Which method is safest for diluting concentrated sulphuric acid in a laboratory?What colour does phenolphthalein become in a basic solution?Blue litmus turns red in acid. What does this identify?Red litmus turns blue in a base. What does this identify?What colour can turmeric paper show when soap solution is added to it?Onion extract is considered what type of indicator?Vanilla extract is what type of indicator?As the pH value becomes lower, what happens to the acidity of a solution?