Thermite is a mixture of

In the extraction of copper,metal is formed in the Bessemer converter due to the reaction:

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.

Native silver metal forms a water soluble complex with a dilute aqueous solution of $NaCN$ in the presence of

In which of the following metallurgy,self-reduction is not possible?

What is the slag formed in the extraction of iron?