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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

Why can the quality of plaster of Paris be spoiled by overheating gypsum?Blue copper sulphate became white on heating and turned blue again on adding water. What was proved?Why does a salt solution conduct electricity even though it is neutral?Sugar solution does not conduct electricity but sodium chloride solution does. What is the reason?What is the correct order of gases formed at anode and cathode in the chlor-alkali process?Where is sodium hydroxide obtained in the chlor-alkali process?How will the gas formed on heating baking soda be confirmed?What kind of solution is formed in water by the solid left after heating baking soda?What is the main reason for adding an acidic substance to baking powder?If baking powder contains only baking soda and no acidic substance, why can the taste of the food be affected?Why is a mouth pH below 5.5 dangerous in tooth decay?What is the chemical benefit of basic toothpaste for teeth?Why is slaked lime useful in treating acidic soil?What is the correct reason for adding organic matter to highly basic soil?How does acid rain damage the surface of marble?The pH of a lake decreases due to acid rain. Why is this dangerous for aquatic organisms?What chemical risk can occur by storing curd in a copper vessel?If phenolphthalein is pink and methyl orange is yellow, what is the nature of the solution?If methyl orange is red and phenolphthalein is colourless, what should be added to neutralise the solution?Turmeric becomes reddish-brown and red litmus turns blue. Which ion will be in excess in the solution?