1.

Write an activity about how you conduct an experiment to show that more reactive metals replace less reactive metals from their compounds.

Answer»
  • Take two iron nails and clean then by rubbing with sand paper. 
  • Take two test tubes and mark them ‘A’ and ‘B’. 
  • Pour copper sulphate solution in the test tube ‘A’ and Zinc Chloride solution in the test tube ‘B’. 
  • Dip iron nails in both test tubes. 
  • Keep them without disturbing for 20 min.

Observation : 

  1.  The nail which is dipped in Copper Sulphate solution becomes brownish colour. 
  2.  The nail which is dipped in Zinc Chloride solution doesn’t change.

Reaction : 

  1. In test tube ‘A’: CuSO4 + Fe → FeSO4 + Cu 
  2. In test tube ‘B’: ZnCl2 + Fe → No reaction.

Conclusion : 

  1.  Iron is more reactive than copper. So it displaces copper from Copper Sulphate solution. 
  2.  Iron is less reactive than zinc. So, it doesn’t displace zinc from ZnClr


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