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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 does not dissolve in water but reacts with acid to form salt and water. What can it be called?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceA gas turns moist blue litmus red. What does this indicate about the gas?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIn a solution both red and blue litmus do not change colour. What is the most appropriate conclusion?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich substance is considered useful for reducing permanent hardness of water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich is the most suitable sequence to confirm the presence of carbonate ions in a sample?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIf baking soda is heated, what will be the main substance in the solid residue?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich statement about the nature of salts is incorrect?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhen acid is added to a solution, its pH goes below 7. Which ion has become relatively more abundant?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIf a small amount of acid falls on the skin, what should be the first safe step in the laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich pair is a correct daily-life example of neutralisation?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceIf a substance gives hydroxide ions in water, what effect will its solution show on an indicator?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhy is care needed while mixing a strong base with water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhen acid and base are added dropwise separately to a solution, its pH changes each time. What does this show?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhen sodium carbonate crystals are heated, their hydrated nature decreases. This is related to which idea?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich substance is used for bleaching in the textile industry?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceA solution has pH 7 but contains a dissolved salt. Which salt is most likely?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhat is the colour of methyl orange in an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceAn acid reacts with zinc to give one gas and with sodium carbonate to give another gas. What are the correct identities of the two gases?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIf one solution has one hundred times more hydrogen ions than another solution, by how much will its pH be lower approximately?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceTurmeric as a natural indicator is especially useful for identifying which type of solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy