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Answer the following questions:
   
Answer variants:
Due to the formation of yellowishiron sulphate solution
Double displacement reaction
The metal with the most reactive will displace the less reactive metal.
Each metal reacts with their salt solution more reactive metal reacts more, less will be least.
   
1. How would you devise the procedure to show that \(Mg\)>\(Fe\)>\(Cu\) in reactivity series?
   
 
2. What is the basic principle involved in this 'iron nai in copper sulphate' experiment?