First slide

General methods of extraction of elements from the earth crust

Question

Refer to the above Ellingham diagram, select correct option.

Moderate

A

Reduction of E₂O₃ to E is possible by C below 1000^oC
B

At 500^oC reduction of oxide of A, B is possible by C.
C

Extraction of D is possible reduction of its oxide by B and C
D

Below 400^oC oxide of A should decompose into metal and O₂

Solution

Correct (l): Reduction of E₂O₃ to E is possible above that temperature where line of E cross line of C. i.e., above 1000^oC (at point p₁) Correct (4) Extraction of D is possible reduction of its oxide by E and F.

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