With respect to an ore,the Ellingham diagram helps to predict the feasibility of its:

Copper sulphate is commercially made from copper scraps by:

The purpose of smelting of an ore is

Which of the following chemical equations represents the hydrometallurgical process for the extraction of copper from its ore?

Which of the following conditions favours the reduction of a metal oxide to metal?

Observe the following statements:
Statement-$I$: The choice of reducing agent for the reduction of an oxide ore can be predicted by using Ellingham diagram,a plot of $\Delta G^{\ominus}$ vs $T$.
Statement-$II$: According to Ellingham diagram,metal oxide with higher $\Delta G^{\ominus}$ is more stable than the oxide with lower $\Delta G^{\ominus}$.