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Iron

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

ScienceMagnesium reacts faster with an acid than iron does. What does this show?Class 10Metals and Non-metalsReactivity seriesLevel 9Medium ScienceA student placed an iron nail in blue copper sulphate solution. The solution gradually turned green and a reddish-brown coating appeared on the nail. Which statement is correct?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy can rusting start when the paint layer on iron is scratched?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Expert 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 EquationsLevel 3Expert ScienceWhen an iron nail is placed in blue copper sulphate solution, the solution turns green and a reddish-brown coating forms on the nail. What type of reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhen an iron nail is immersed in a blue copper sulphate solution, the blue colour fades. This is mainly due to which ionic change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Expert ScienceWhich two conditions are necessary for rusting of iron?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium ScienceWhy does a reddish-brown coating form on an iron nail placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Expert ScienceA 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 5Hard ScienceA student writes the reaction on placing an iron nail in aqueous copper sulfate solution as: \(2Fe + 3CuSO_4 \rightarrow Fe_2(SO_4)_3 + 3Cu\). What correction is required in the equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Hard ScienceUnder which condition will iron rust the most?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy does a reddish-brown coating form on an iron nail and the solution turn green when the nail is placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Hard ScienceWhen an iron nail is placed in a blue copper sulphate solution, a reddish-brown copper coating forms on the nail and the solution turns pale green. What causes both changes?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Hard ScienceA student placed an iron nail in blue copper sulphate solution and said, “Copper is more reactive than iron, so copper gets deposited on the nail.” Which is the correct correction to this statement?Class 10Metals and Non-metalsReactivity seriesLevel 1Hard ScienceWhat type of reaction is \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\), and why?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Hard ScienceOne iron nail is kept in a dry, airtight bottle and another nail is kept in moist open air. Which nail will rust faster?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Hard ScienceWhich new salt is formed when an iron nail is placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Hard ScienceA student calls the reaction \(Fe + CuSO_4 \rightarrow FeSO_4 + Cu\) a double displacement reaction. What is the correct correction to the statement?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhich pair of products is formed when an iron nail is placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium ScienceIn which condition is an iron object most likely to rust?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 1Medium