Chemistry Question on General Principles and Processes of Isolation of Elements

Question

When compared to $\Delta G^\circ$ for the formation of $Al_2O_3$ , the $\Delta G^\circ$ for the formation of $Cr_2O_3$ is

Answer 1

Solution

Between $Al_2O_3$ and $Cr_2O_3, Al_2O_3$ is more stable, so its ease of formation is high i.e., $\Delta G?$ is negative or less than that of $Cr_2O_3$ .

Hence, $\Delta G?$ of $Cr_2O_3$ > $\Delta G?$ of $Al_2O_3$