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Class 10 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceIf a salt solution turns red litmus blue, which could be a possible example?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceAn unknown gas turns lime water milky but does not give a pop sound near a burning splint. Which gas is it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhy does the solution become warm when acid is added to water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceBlue litmus turns red in a solution. Then sodium hydroxide is added drop by drop. What happens near the neutralisation point?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceAn aqueous solution feels soapy and turns red litmus blue. In which range is its pH most likely to be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceWhy do small pellets of sodium hydroxide become wet when left exposed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceA solution conducts electricity but does not contain solid sodium chloride. What is the best reason for conductivity of an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIf a substance turns blue litmus red and forms salt and water with another substance, what is the nature of the second substance?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceWhy is a basic toothpaste useful for teeth?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceWhy can acid rain damage marble buildings?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceA farmer's soil has pH 8.5. He wants to reduce its basicity. Which method would be more suitable?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIn a solution phenolphthalein is colourless but methyl orange is yellow. What type of solution could it be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhen water is added to plaster of Paris, into which substance does it harden?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceWhy can the effectiveness of bleaching powder decrease when it is kept exposed to air for a long time?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhat is the correct order of gases formed at the anode and cathode in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhat is the main chemical difference between washing soda and baking soda?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhy does the blue colour return when water is added after heating blue copper sulphate crystals?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIn an experiment with dry ammonia gas and moist red litmus paper, why can the litmus turn blue?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIf dilute acid is added to both sodium carbonate and sodium hydrogen carbonate, which test will give the same result?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceA salt solution turns blue litmus red. From what type of acid and base could this salt be formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Hard