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  • I have a doubt, kindly clarify. Match items of Column I with the items of Column II and assign the correct code: Column-I Column-II (A) Cyanide process (i) Ultrapure Ge (B) Froth flotation process (ii) Dressing of ZnS

Match items of Column I with the items of Column II and assign the correct code:

      Column-I  Column-II
(A) Cyanide process (i) Ultrapure Ge
(B) Froth flotation process (ii) Dressing of ZnS
(C) Electrolytic reduction (iii) Extraction of Al
(D) Zone refining (iv) Extraction of Au
  (v) Purification of Ni
  • Option 1)

    Code:

                 (1)           (2)            (3)           (4)

                (iv)           (ii)            (iii)            (i)

  • Option 2)

    Code:

                 (1)           (2)            (3)           (4)

                 (ii)           (iii)            (i)            (v)

  • Option 3)

    Code:

                 (1)           (2)            (3)           (4)

                 (i)            (ii)            (iii)           (iv)

  • Option 4)

    Code:

                 (1)           (2)            (3)           (4)

                (iii)           (iv)            (v)            (i)

 

Answers (1)

best_answer

 

Electrolytic Refining -

Many of the metals such as Cu,Au,Ag,Al,Hb etc are purified by this method.

- wherein

The impure metal is made anode while a thin sheet of pure metal acts as a cathode. 

 

 

Thermodynamic principle of Metallurgy -

\bigtriangleup G=\bigtriangleup H-T\bigtriangleup S

also \bigtriangleup G^{\circ}= -RTlnK

- wherein

K is equilibrium constant.If \bigtriangleup G  for a reaction is negative reaction is fusible.

 

 

Zone Refining -

A movable heater is fitted around a rod of impure metal.The heater is slowly moved across the rod.The metal melt at the point of heating and as the heater moves on from one end of the rod to the other end, the pure metal  crystallised while the impurities pass on adjacent melted zone. 

- wherein

 

 Cyanide process is used for extraction of Au by formation of water soluble complex \left [ A_{u}\left ( CN \right )_{2} \right ]^{-}


Option 1)

Code:

             (1)           (2)            (3)           (4)

            (iv)           (ii)            (iii)            (i)

Correct Option

Option 2)

Code:

             (1)           (2)            (3)           (4)

             (ii)           (iii)            (i)            (v)

Incorrect Option

Option 3)

Code:

             (1)           (2)            (3)           (4)

             (i)            (ii)            (iii)           (iv)

Incorrect Option

Option 4)

Code:

             (1)           (2)            (3)           (4)

            (iii)           (iv)            (v)            (i)

Incorrect Option

Posted by

Aadil

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