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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।

ScienceA substance forms salt and water with acid but is insoluble in water. What is it called?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10EasyScienceEqual volumes of acid and base are mixed, yet the solution remains basic. What is the most suitable reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceEqual volumes of acid and base are mixed, yet the solution remains acidic. What is the most suitable reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceWhy does an acidic solution not immediately become basic even after strong dilution with water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceWhen sodium hydroxide is slowly added to an acidic solution, what is the main ionic change?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceAn acidic solution changes from pH 3 to pH 6. Approximately how much did the acidity decrease?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10HardScienceA solution changes from pH 12 to pH 10. What is the correct conclusion?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceIn a solution, turmeric becomes reddish-brown and red litmus turns blue. Which ion will be in excess?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10EasyScienceMethyl orange is red and phenolphthalein is colourless in a solution. What should be added to neutralise it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10EasySciencePhenolphthalein turns pink and methyl orange appears yellow in a solution. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10EasyScienceWhy is it chemically unsafe to store curd or pickle in a copper vessel?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceWhat chemical reason explains the effect of acid rain on marble?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceWhy can adding organic matter improve highly basic soil?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceWhy does adding slaked lime to acidic soil increase pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceHow does basic toothpaste help protect teeth?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceWhy does enamel risk increase when tooth pH goes below 5.5?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceBaking powder reacts little in a dry container but produces gas in moist dough. What is the reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceOn heating baking soda, the gas formed turns lime water milky. What nature of solution does the remaining solid form?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceWhy is it necessary to keep the products separate in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10MediumScienceIn the chlor-alkali process, what is the correct pair of gas at cathode and gas at anode?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium