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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।

ScienceOne substance loses oxygen and another substance gains that oxygen. What is the most accurate term for this reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2HardScienceWhy is the conversion of copper oxide into copper called reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2EasyScienceIn the reaction CuO + H₂ → Cu + H₂O, the formation of water proves the oxidation of which substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceWhat is a reaction called in which hydrogen is removed from a substance or oxygen is added to it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1EasyScienceWhat is the process called in which hydrogen is added to a substance or oxygen is removed from it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1HardScienceWhen oxygen is removed from one substance and, in the same reaction, added to another substance, what is the reaction called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1HardScienceWhich substance is reduced in the reaction between copper(II) oxide and hydrogen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1HardScienceWhich substance is oxidised in the reaction between copper(II) oxide and hydrogen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1HardScienceWhen copper(II) oxide is heated with hydrogen gas, the black substance changes into a reddish-brown substance. What is the reddish-brown substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1HardScienceRemoval of hydrogen from a substance generally indicates which process?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5EasyScienceIf hydrogen is added to a substance, it is generally related to which process?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5EasyScienceWhich process generally occurs when oxygen is removed from a substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceWhich two processes occur simultaneously in a redox reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceHow is a redox reaction identified?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceIn which situation is a substance considered to be reduced?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceIn which situation is a substance considered to be oxidised?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceWhich statement is correct about the reaction CuO + H₂ → Cu + H₂O between copper(II) oxide and hydrogen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceWhich statement about oxidation and reduction in a redox reaction is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceWhen copper oxide is converted into copper, which process takes place?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceIf hydrogen is removed from a substance, which process is it generally considered to be?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Easy