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Class10

Class 10 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceWhich of the following substances has an aqueous solution that turns red litmus paper blue?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy ScienceWhat is the safe method while diluting an acid?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy ScienceWhy does dry hydrogen chloride gas not affect dry litmus?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy ScienceBases give which type of ions when dissolved in water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 9Easy ScienceWhat type of process is mixing acid with water?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Easy ScienceWhat kind of pH value does the most basic solution have?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Easy ScienceWhat kind of pH value does the most acidic solution have?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Easy ScienceA substance that feels soapy and slippery is generally of which type?Class 10Chemical Substances – Nature and BehaviourAcids, Bases, and SaltsLevel 8Easy ScienceRancidity of oils and fats is the result of which chemical process?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhat is the chemical reason why an oiled iron object rusts less?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy can rusting start when the paint layer on iron gets scratched?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy are both oxygen and moisture considered necessary for rusting of iron?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy do oxidation and reduction occur together in a redox reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy is hydrogen called oxidised in the reaction between copper oxide and hydrogen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceIn the reaction of copper oxide and hydrogen a black substance becomes reddish brown. What does it correctly mean?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy is a precipitate shown with a downward arrow?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy ScienceFormation of white insoluble barium sulphate proves which dual identification?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceMetal A is less reactive than metal B. What happens when metal A is placed in the salt of metal B?Class 10Metals and Non-metalsReactivity seriesLevel 5Medium ScienceMetal A displaces metal B and metal B displaces metal C from their salts. What is the correct decreasing order of reactivity?Class 10Metals and Non-metalsReactivity seriesLevel 5Medium ScienceFading of the blue colour of copper sulphate is related to which ionic change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium