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Class 10 Mcq

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

ScienceWhich statement correctly describes the general nature of metal oxides and non-metal oxides?Class 10Chemical Substances – Nature and BehaviourMetals and Non-metalsLevel 7Medium ScienceA dilute acid gives gas with a metal, but the same acid generally gives no gas with copper. What is the main reason?Class 10Metals and Non-metalsReactivity seriesLevel 7Medium ScienceIn which situation is hydrogen gas most likely to be formed?Class 10Chemical Substances – Nature and BehaviourMetals and Non-metalsLevel 6Medium ScienceWhich gas is released on heating sodium hydrogen carbonate and helps cakes rise?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 6Medium ScienceWhat sound is heard when a burning splint is brought near hydrogen gas?Class 10Chemical Substances – Nature and BehaviourLevel 9Easy ScienceWhy can respiration be called a controlled energy-releasing chemical process?Class 10Life ProcessesRespirationLevel 5Medium 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 ScienceWhy does copper deposit when an iron nail is placed in copper sulphate solution?Class 10Metals and Non-metalsReactivity seriesLevel 5Medium ScienceWhat causes the green solution when an iron nail is placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium