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Class 10ScienceChemical Substances – Nature and BehaviourChemical Reactions and EquationsMedium
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Which pair of products is formed when an iron nail is placed in copper sulphate solution?

Answer and explanation

Correct answer: Iron(II) sulphate and copper

Iron is more reactive than copper, so it displaces copper from copper sulphate solution: \(\mathrm{Fe + CuSO_4 \rightarrow FeSO_4 + Cu}\). Therefore, iron(II) sulphate and copper are the products. Iron oxide and hydrogen are not formed because oxygen and an acid are not involved in this reaction.

Related tags

ScienceClass 10Chemical ReactionsDisplacement ReactionIronCopper Sulphate
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10 more MCQs
  1. 1What is the process called when one or more substances form new substances with different properties?
  2. 2Which of the following observations can be a common sign that a chemical reaction has occurred?
  3. 3What are the substances written on the left side of the arrow in a chemical equation called?
  4. 4What are the substances written on the right side of the arrow in a chemical equation called?
  5. 5Balancing a chemical equation is based on which law?
  6. 6What must be the same on the reactant and product sides of a balanced chemical equation?
  7. 7When two or more reactants combine to form a single product, what type of reaction is it?
  8. 8Calcium oxide reacts with water to form calcium hydroxide. What type of reaction is this?
  9. 9When a compound breaks down into two or more simpler substances, what type of reaction is it?
  10. 10When calcium carbonate is heated, it forms calcium oxide and carbon dioxide. What type of reaction is this?
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