Write the name and principle of the method used for refining of (a) Tin, (b) Copper, (c) Nickel.

 

 

 

 
 
 
 
 

Answers (1)

(a)    Tin:    Liquidation

        Principle: It is based on the difference in the melting point of impurities and metals. i.e metal contains impurities that are also less feasible than metal themselves.

(b)    Copper:    Electrolytic Refining

        Principle: The more electropositive impurities pass into solution as soluble salts while the less electropositive settle down as anode mod.

(c)    Nickel:    Mond's process

        Principle: In this method, the crude metal is freed from impurities by first converting it into a suitable volatile compound by heating and then decomposing the volatile compound at some higher temperature to give the pure metal.

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