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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।

ScienceWhy is the pH of acid rain lower than that of normal rain?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf equal volumes of an acid and a base are mixed but the pH does not become 7, what could be a possible reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceA solution had pH 3 and after dilution it became pH 5. By how much did the hydrogen ion concentration decrease?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceFrom the pH point of view, why is cleaning the mouth after meals useful for teeth?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Medium ScienceIf the pH of a basic solution changes from 12 to 9, which statement about the effect of hydroxide ions is most correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceA solution is diluted slowly, but its pH does not move far from 7 because it was already neutral. Which solution could it be?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceIf the hydrogen ion concentration in a solution increases ten times, what happens to the pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceIf the pH of the mouth falls below 5, what situation develops for the teeth?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhat is the role of acid in damaging tooth enamel?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceA solution has pH 9. Acid is added and the pH becomes 7. What reaction has occurred?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy ScienceAcid rain lowers the pH of a lake. Why can this seriously affect aquatic organisms?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceIf equal amounts of water are repeatedly added to an acidic solution, what change is expected?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceIf the pH of a solution is brought from 11 close to 7, which ion is being effectively reduced?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceA little base is added to an acidic solution, so pH increases but complete neutralisation does not occur. Why?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Medium ScienceIf the amounts of hydrogen ions and hydroxide ions in a solution are nearly balanced, what will its pH be like?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Easy ScienceWhy does pH increase when hydroxide ions are added to an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Medium ScienceWhy would it be wrong to call a solution with pH 8 neutral?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Medium ScienceWhat is the main process behind the decrease in pH during tooth decay?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Medium ScienceAn aqueous salt solution shows pH 5. What is the most probable formation condition of this salt?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Medium ScienceA universal indicator gives deep red colour in one solution and violet colour in another solution. Which comparison is correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Medium