The materials mixed with the ore before it is subjected to smelting in the extraction of iron are:

Smelting is done in

During the cyanide process,the silver complex ion formed is......

In the extraction of which of the following metals is a complex salt formed?

Explain the extraction of iron from its oxide ores.

Given below are two statements.
Statement $I$: According to the Ellingham diagram,any metal oxide with higher $\Delta G^{\circ}$ is more stable than the one with lower $\Delta G^{\circ}$.
Statement $II$: The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram.
In the light of the above statements,choose the correct answer from the options given below.