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Chemical Reactions

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

ScienceWhat is the main scientific reason for filling chips packets with nitrogen gas?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium 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 of the following equations represents a displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy does painting iron reduce rusting?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceRusting of iron is an example of which process?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceIf hydrogen is added to a substance, it is generally related to which process?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy ScienceWhich process generally occurs when oxygen is removed from a substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhich process generally occurs when oxygen is added to a substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Easy ScienceWhich two processes occur simultaneously in a redox reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhat happens to hydrogen in the reaction between copper oxide and hydrogen?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceAn iron nail was kept in a blue copper sulfate solution for some time. The solution turned light green and a reddish-brown coating appeared on the nail. Which is the correct explanation of this change?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhat is the main characteristic of a double displacement reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhen an iron nail is placed in copper sulphate solution, the solution changes colour and copper is deposited. What type of chemical reaction is this?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy does no reaction occur when a copper strip is placed in zinc sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhen an iron nail is placed in copper sulphate solution, the reddish-brown coating formed on the nail is of which substance?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhich statement is correct when an iron nail is placed in copper sulphate solution?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy is silver bromide stored in a dark-coloured bottle?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhy does silver chloride turn grey when kept in sunlight?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceWhich solid product is formed on thermal decomposition of lead nitrate?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium ScienceDuring the electrolysis of water, which gas is produced at the cathode in a greater volume?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 5Medium