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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।

ScienceA student claims that in the reaction 2Mg + O₂ → 2MgO, magnesium is reduced because it combines with oxygen. What is the correct evaluation of this claim?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsMedium ScienceIn which of the following reactions does an element in the same substance undergo both oxidation and reduction simultaneously?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceIn which of the following reactions do oxidation and reduction occur simultaneously?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceWhich statement about oxidation and reduction is correct in the given equation? \(2\mathrm{FeCl_3} + \mathrm{SnCl_2} \rightarrow 2\mathrm{FeCl_2} + \mathrm{SnCl_4}\)Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceWhich of the following is a redox reaction in which the oxidation number of one element increases and that of another element decreases?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceIn the thermite reaction Fe₂O₃ + 2Al → Al₂O₃ + 2Fe, which statement correctly identifies oxidation and reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceIn the thermite reaction \(Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe\), which substance is oxidised and which is reduced?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceIn the reaction \(Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe\), which substance acts as the reducing agent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceIn the reaction \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), which of the following statement is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceIn the reaction \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), which substance is reduced?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceWhich of the following reactions involves oxidation of one substance and reduction of another substance simultaneously?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsExpert ScienceIn the reaction CuO + H₂ → Cu + H₂O, which statement is correct with respect to oxidation and reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsMedium ScienceIn the reaction \(2\mathrm{FeCl_3} + \mathrm{SnCl_2} \rightarrow 2\mathrm{FeCl_2} + \mathrm{SnCl_4}\), which substance is the reducing agent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceIn the thermite reaction \(Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe\), which substance acts as the reducing agent?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceWhich 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 EquationsHard ScienceIn 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 EquationsHard ScienceIn which of the following reactions does the same element undergo both oxidation and reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceWhich correctly identifies the oxidation and reduction changes in the reaction CuO + H₂ → Cu + H₂O?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsMedium ScienceIn which of the following reactions does the same substance undergo both oxidation and reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsHard ScienceIn 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 EquationsHard