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Oxidation

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

ScienceIf substance A loses oxygen and substance B gains that oxygen, which statement is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1MediumScienceFormation of water in the reaction of copper oxide and hydrogen proves oxidation of which substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1ExpertScienceWhat is the main purpose of rubbing magnesium ribbon with sandpaper before burning it?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1ExpertScienceA student writes the rusting reaction as \(Fe + H_2O \to Fe_2O_3 + H_2\). What is the most fundamental error in this statement?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceIn an experiment, copper powder forms black CuO when heated in air. When H2 is passed over it on heating, reddish-brown copper is obtained again. Which is the correct explanation of these changes?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5HardScienceWhat 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 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 5HardScienceIn 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 4HardScienceIn a nitrogen-filled packet, how are the oils in chips mainly prevented from becoming rancid?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4HardScienceA student heated copper powder in air. The reddish-brown copper turned black. Which statement about this change is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceWhat is the main chemical process behind bad taste and smell of oils and fats?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4EasyScienceIf 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 4EasyScienceWhich 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 3HardScienceWhat common effect do antioxidants and airtight packaging have?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3HardScienceWhy will rancidity increase quickly in ghee kept in a warm open place?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium