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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

Methyl orange is yellow and turmeric is reddish-brown in a solution. What is the correct conclusion about this solution?Equal volumes of acid and base are mixed, but the solution remains basic. What is the most likely reason?Which base is obtained during electrolysis of aqueous common salt solution?When the pH of an acidic solution changes from 2 to 5, what happens to hydrogen ion concentration?Why should bleaching powder be stored in a dry closed container?A solution that turns blue litmus red gives no gas with copper but gives gas with magnesium. What is the correct reason?A soil has pH 8.8. Which idea is correct to balance it for crops?An acidic gas does not turn dry blue litmus red but turns moist blue litmus red. What does this prove?Which pair is correct?An aqueous solution feels soapy and shows pH 12. Why can touching it directly be dangerous?Which test is correct to confirm the gas released in the reaction of an acid with an active metal?If hydrogen ions and hydroxide ions are nearly balanced in a solution, what colour will universal indicator show?The milkiness of lime water appears due to formation of which insoluble compound?Why is it wrong to identify an acid by taste in the laboratory?The pH of an acidic solution changes from 3 to 6. What happens to acidity?Why does pH increase when slaked lime is added to acidic soil?Which statement about the nature of salts is correct?If a solution shows pH 13, what precaution is correct while handling it?Why is acid rain harmful to aquatic organisms?One solution turns red litmus blue and another turns blue litmus red. What will be the main products when they are mixed?