Poling process is employed for the removal of :

C u_{2} O

from

C u

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A l_{2} O_{3}

from

A l

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F e_{2} O_{3}

from

F e

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none of the above

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Solution

The correct option is A $C u_{2} O$ from $C u$
Poling is a method employed in the purification of copper which contains cuprous oxide as an impurity.

The impure metal, usually in the form of molten blister copper, is placed in an anode furnace for two stages of refining.

Poling process wood gas reduces $C u_{2} O$ to $C u$ .

Option A is correct.

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Similar questions

You are given an Ellingham diagram (deliberately not shown). It is given that for almost all practically achievable temperatures, the $F e \to F e_{2} O_{3}$ line lies above the $A l \to A l_{2} O_{3}$ line and $Δ_{f} G^{\circ}$ for both $A l_{2} O_{3}$ and $F e_{2} O_{3}$ are negative. Which of the following statements is/are true?

Q. Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
(a) Al₂O₃ + Fe
(b) MnO₂ + Al
(c) Fe₂O₃ + Al
(d) Cu₂O + Fe

${F e}_{2} O_{3}$ + $A l$ $\to$ $F e$ + ${A l}_{2} O_{3}$ + $h e a t$
This is the reaction used in thermite welding process. Calcium can also be used instead of aluminium in this process.

Q. Polling process is employed for the removal of:

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