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Subjects

Science

Acids, Bases, and Salts

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.

Expert · Level 1 · 6 questions

Practice questions

01Why does dry hydrogen chloride gas not change the colour of dry blue litmus paper?

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Answer and explanation

02A gas produced by adding dilute hydrochloric acid to sodium carbonate solution is passed through limewater. Why does limewater first turn milky and then become clear when excess gas is passed?

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03Dry hydrogen chloride gas has no effect on dry blue indicator paper. What is the most correct reason?

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04Why will the same gas change colour on moist blue indicator paper?

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05An unknown solution turns blue indicator paper red and gives a gas with magnesium. What is the nature of the solution?

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06A salt solution shows pH 9. It is more likely formed from what?

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