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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।

ScienceWhat is the correct order of the processes in which hydrogen is removed from a substance and then added to a substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5MediumScienceIn the reaction between copper(II) oxide and hydrogen, the formation of water indicates the oxidation of which substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhen copper(II) oxide is heated with hydrogen gas, what change occurs in the copper(II) oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhich correctly identifies oxidation and reduction in the following reaction? \(\mathrm{Zn + CuSO_4 \rightarrow ZnSO_4 + Cu}\)Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceIn the reaction \(CuO + H_2 \rightarrow Cu + H_2O\), which statement about oxidation and reduction is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhich correctly identifies the oxidation and reduction changes in the reaction CuO + H₂ → Cu + H₂O?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceIn the reaction \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), which correctly identifies the oxidation and reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceWhich statement is correct for the reaction \\(CuO + H_2 \rightarrow Cu + H_2O\\)?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceIf substance A loses oxygen and substance B gains that oxygen, what is the correct sequence of changes in substances A and B?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhen copper(II) oxide is heated with hydrogen, copper is formed. Which process occurs to copper(II) oxide in this reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4MediumScienceWhich statement correctly describes oxidation and reduction in the reaction \\(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\\)?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceIn the reaction \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), which reactant is the reducing agent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceIn the reaction CuO + H₂ → Cu + H₂O, which is the correct identification of oxidation and reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceWhich statement correctly identifies oxidation and reduction in the reaction \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\)?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceWhich pair shows oxidation first and reduction second?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3EasyScienceIn a chemical reaction, oxygen is removed from substance A and the same oxygen is added to substance B. What is the most appropriate classification of this reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3MediumScienceIf copper oxide becomes copper in the reaction with hydrogen, what change has occurred?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3EasyScienceWhich of the following reactions involves both oxidation and reduction occurring simultaneously?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2MediumScienceIn which situation is a substance oxidised?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2HardScienceIn which situation will a substance be reduced?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Easy