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Oxidation Number

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

ScienceIn which of the following reactions does the same element undergo both oxidation and reduction simultaneously?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceWhich 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 EquationsHard ScienceIn the reaction \(CuO + H_2 \rightarrow Cu + H_2O\), which substance is the reducing agent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceWhich 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 EquationsHard ScienceWhich of the following reactions is not an oxidation-reduction (redox) reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceIn which of the following reactions does one part of the same reactant undergo oxidation while another part undergoes reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceA student says that magnesium is not oxidised in the reaction 2Mg + O₂ → 2MgO because it merely combines with oxygen to form a compound. What is the error in this statement?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsMedium