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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 hydroxide ions are slowly added to an acidic solution, why will its pH increase?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceTo protect tooth enamel from dissolving, it is better to keep mouth pH above which limit?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceAmong two acids of equal concentration, one has lower pH and higher conductivity. What type of acid is it likely to be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Medium ScienceA salt solution shows pH 9 and turns red litmus blue. From which type of acid and base could it be formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 14Hard ScienceIf a solution has pH 11 and phenolphthalein is pink, what will decrease first when acid is added?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceWhy can acid rain water be more corrosive than normal water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceIf acid is slowly added to a basic solution, what change is expected near neutralisation?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceIf the pH around teeth falls below 5.5, which process can start?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA small amount of base is added to an acidic solution and pH changes from 3 to 5. How much did the acidity change approximately?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceWhy does pH increase when hydroxide ions are added to an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA solution has pH 13. After adding water, its pH becomes 11. What is the correct conclusion?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceIf equal volumes of acid and base are mixed but the solution remains acidic, which reason may be correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Medium ScienceA salt solution shows pH 6 and turns blue litmus slightly red. From what may this salt be formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 13Hard ScienceWhy does an acidic solution not immediately become basic when a large amount of water is added?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceWhy is acid rain harmful for aquatic organisms in lakes?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceIf an aqueous solution has pH close to 14, what careful conclusion should be taken while handling it?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Easy ScienceWhich statement about salts is correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceA solution has pH 7 and the universal indicator gives a light green colour. What nature does this indicate?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Easy ScienceIf an acidic solution is diluted with water and its pH changes from 2 to 4, what happens to its hydrogen-ion concentration?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Medium ScienceEqual volumes of an acid and a base are mixed, but pH does not become 7. Which reason is most scientific?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 12Hard