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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 substance can generally be applied to reduce irritation caused by an ant bite?Which salt solution generally shows basic nature in water?Which salt solution can generally show acidic nature in water?Why is an aqueous solution of sodium chloride generally neutral?Carbonates and hydrogen carbonates both react with acids to give which common gas?Why does magnesium ribbon produce bubbles while reacting with dilute acid?Why does copper generally not produce hydrogen gas with dilute hydrochloric acid?An unknown solution turns blue litmus red and gives a gas with metal carbonate that turns lime water milky. What is the nature of the solution?A solution has pH 2 and is diluted to become one hundred times less acidic. What will be the approximate new pH?A solution gives orange colour with universal indicator and becomes yellow after adding more water. What is the correct conclusion?Why is the conductivity of hydrochloric acid greater than ethanoic acid at the same concentration?A salt solution turns blue litmus slightly red. From which type of acid and base may this salt be formed?A salt solution turns red litmus blue. It is more likely formed from which combination?A white solid gives a gas with acid that turns lime water milky. The solid may belong to which group?Carbon dioxide first makes lime water milky and then removes the milkiness in excess. What is the second soluble substance?Magnesium and calcium carbonate are added separately to an acidic solution. What is the correct order of gases formed?While diluting acid, why is it correct to add acid slowly to water instead of water to acid?An acidic gas has no effect on dry blue litmus but turns moist blue litmus red. What is the correct reason?Ammonia gas turns moist red litmus blue but has no effect on dry red litmus. What does this prove?Why can sodium hydroxide become impure when kept in open air?