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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 solution gives one gas with zinc and another gas with sodium carbonate. What is the correct identification of both gases?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 10Hard ScienceA student says all acids give the same amount of hydrogen gas with metals. Why is this statement wrong?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceIf a basic substance is highly soluble in water and can burn skin, how should it be used in the laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceIf a solution has more hydroxide ions and fewer hydrogen ions, what colour may universal indicator show?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhen an acidic solution is neutralised by a base, what determines the nature of the salt formed?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhich substance is important in both disinfecting and bleaching uses?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium 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 ScienceMethyl orange is red and phenolphthalein is colourless in a solution. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhich statement about chemical products related to common salt is correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceWhat is a water-soluble base called?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy ScienceLime is added to improve acidic soil. What problem can occur if too much lime is added?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 ScienceSour food should not be stored in copper vessels. What is the scientific reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhy did the risk increase when a student added water to acid for dilution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceConsidering carbon dioxide as a non-metal oxide, why does it react with lime water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceA metal oxide is added to an acid and salt and water are formed. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceAn unknown solid reacts with acid to give a gas that turns limewater milky. Which ion may be present in the solid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceIf a solution has pH 3 and it is made one hundred times less acidic, what will be the approximate new pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Hard ScienceWhat is the basic reason for water formation in an acid-base reaction?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium ScienceWhich substance is useful in softening hard water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Medium