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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।

ScienceAt which electrode is hydrogen produced in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceAt which electrode is chlorine produced in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich is the correct set of products formed in the chlor-alkali process?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceGypsum forms plaster of Paris when heated at about 373 K. Why may the desired product not be obtained on excessive heating?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Hard ScienceWhy does plaster of Paris become hard when mixed with water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhy is bleaching powder used to disinfect drinking water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceWhy can bleaching powder give a chlorine-like smell when kept in moist air?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceIf dilute acid is added to an unknown solid and the evolved gas turns lime water milky, which ion is likely present in the solid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhy is aluminium oxide called an amphoteric oxide?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich gas can be released when sodium hydroxide reacts with zinc?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium SciencePhenolphthalein turns pink in sodium hydroxide. When hydrochloric acid is added slowly, when will the colour disappear?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhat is the colour of methyl orange indicator in an acidic solution?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceIf a solution turns red litmus blue and phenolphthalein pink, what is its likely pH?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceIn which reaction is carbon dioxide gas most likely to be evolved?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceWhich pair will react to form calcium sulphate and water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceThe pH of ammonium chloride solution is found to be less than 7. What is the correct reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceAqueous sodium carbonate turns red litmus blue. What nature does this show?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Easy ScienceA salt can be acidic, basic, or neutral. Why is sodium chloride generally considered neutral?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceThe basic strength of sodium hydroxide solution may decrease if it is left open for a long time. What is the main reason?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium ScienceWhich type of substance is most suitable for relief from nettle leaf sting?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 7Medium