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  • (a) With the help of a diagram explain the method of refining of copper by electrolysis. (b) How are broken railway tracks joined ? Give the name of the process and the chemical equation of the reaction involved.   <div

(a) With the help of a diagram explain the method of refining of copper by electrolysis.

(b) How are broken railway tracks joined ? Give the name of the process and the chemical equation of the reaction involved.

 

 

 

 
 
 
 
 

Answers (1)

(a) With the help of a diagram explain the method of refining of copper by electrolysis.

  • Impure copper is made the anode and thin strip of pure copper is made the cathode.
  • A solution of acidified copper sulphate is taken as electrolyte
  • On passing the current the pure metal from the anode dissolves into the electrolyte and equivalent amount of pure metal is deposited on the cathode

(b) Broken railway tracks joined by filling the gaps with molten iron formed in the reaction of Fe2O3 with aluminum powder.

Thermit process/reaction

 Fe2O3(s)+2Al(s) -----> 2Fe(l)+Al2O3(s)+Heat

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Safeer PP

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