From the low grade copper ore, leached c...

From the low grade copper ore, leached copper can be reduced by either zinc or iron but iron is given preference over zinc because:

iron is more reactive than zinc

iron is less costlier metal than zinc

melting point of iron is low

iron can aquire +3 oxidation state while Zn can acquire +2 oxidation state

Text Solution

Verified by Experts

The correct Answer is:

For low grade copper ore we use:

hydro metallurgy

pyro metallurgy

electro metallurgy

None of these

Zinc is coated over ion iron to prevent rusting of iron because :

it is cheaper than iron

`E_((Zn^(2+)//Zn))^(@) = E_((Fe^(2+)//Fe))^(@)`

`E_((Zn^(2+)//Zn))^(@) lt E_((Fe^(2+)//Fe))^(@)`

`E_((Zn^(2+)//Zn))^(@) gt E_((Fe^(2+)//Fe))^(@)`

Copper can be extracted by hydrometallurgy but not zinc because

Copper is comparatively less active metal as its reduction potential is high. It can be displaced from solutions of `Cu^(2+)` ion by more active metals

`Zn` displaced from solution of `Zn^(2+)` ion, a more reactive metal than it, but then readily reacts with water forming their corresponding ions and evolve hydrogen gas

Both (a) and (b) are correct

Copper can never be extracted by hydrometallurgy

From the low grade copper ore, leached copper can be reduced by either zinc or iron but iron is given preference over zinc because:

Text Solution

Similar Questions

Knowledge Check

For low grade copper ore we use:

Zinc is coated over ion iron to prevent rusting of iron because :

Copper can be extracted by hydrometallurgy but not zinc because

Similar Questions

Recommended Questions