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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

If the pH of a basic solution decreases from 13 to 10, what happens to its basicity?Why can sodium hydrogen carbonate be considered a useful antacid in excess acidity?An acidic solution is diluted with a large amount of water. Which conclusion is most scientific?Why may food taste bitter if baking powder does not contain an acidic component along with baking soda?What will be the approximate pH of the final solution in complete neutralisation of a strong acid and a strong base?A salt solution turns blue litmus red. From what type of acid and base could this salt be formed?If dilute acid is added to both sodium carbonate and sodium hydrogen carbonate, which test will give the same result?In an experiment with dry ammonia gas and moist red litmus paper, why can the litmus turn blue?Why does the blue colour return when water is added after heating blue copper sulphate crystals?What is the main chemical difference between washing soda and baking soda?What is the correct order of gases formed at the anode and cathode in the chlor-alkali process?Why can the effectiveness of bleaching powder decrease when it is kept exposed to air for a long time?When water is added to plaster of Paris, into which substance does it harden?In a solution phenolphthalein is colourless but methyl orange is yellow. What type of solution could it be?A farmer's soil has pH 8.5. He wants to reduce its basicity. Which method would be more suitable?Why can acid rain damage marble buildings?Why is a basic toothpaste useful for teeth?If a substance turns blue litmus red and forms salt and water with another substance, what is the nature of the second substance?A solution conducts electricity but does not contain solid sodium chloride. What is the best reason for conductivity of an acidic solution?Why do small pellets of sodium hydroxide become wet when left exposed?