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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 limewater useful for identifying carbon dioxide in the laboratory?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhich pair correctly lists products obtained from common salt in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhich observation provides experimental evidence that an acidic solution contains ions?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceIf the amount of hydroxide ions in a solution is increased, what will happen to its pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceSodium chloride is a salt formed from acidic and basic sources. Why is the pH of its aqueous solution about 7?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceA solution has pH close to 14. Why can touching it be dangerous?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Easy ScienceAll bases are not soluble in water. Which statement is most correct?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy does heating gypsum at about 373 K produce plaster of Paris?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy is a mild edible acid mixed with baking soda in baking powder?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhich statement correctly explains the difference between a strong acid and a concentrated acid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceTooth decay starts rapidly when the pH falls below which value?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Easy ScienceA solution turns red litmus blue. On adding acid, heat is released and a salt is formed. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy should curd and sour substances not be kept in brass or copper vessels?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceHow does an antacid give relief during excess acidity in the human stomach?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy do farmers add slaked lime to soil when its pH is too low?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceMethyl orange turns red in a solution and phenolphthalein remains colourless. What is the nature of the solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceWhy is plaster of Paris kept away from moisture in a closed container?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceBlue copper sulphate crystals turn white on heating. This change occurs due to removal of what?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceIn the chlor-alkali process, what is formed at the cathode during electrolysis of concentrated sodium chloride solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium ScienceIn the manufacture of bleaching powder, chlorine gas reacts with which substance?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 6Medium