when compared to `DeltaG^(@)` for the formation of `A1_(2)O_(3)` the `Deltag^(@)` for the formation of `Cr_(2)O_(3)` is

Options

A. Same
B. Unpredicted
C. Higher
D. Lower

Answer

C

Explanation

Al acts as a good reducing agent and reduces oxides of metals like Cr, Fe, Mn etc.
`Cr_2O_3 +2Al rarr 2Cr +Al_2O_3` heat , Therefore `DeltaG^@` for the formation of `Al_2 O_3` is lower in comparison to DGº for the formation of `Cr_2O_3`