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. Upredicted
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_(2)O_(3)+2Alto2Cr+Al_(2)O_(3)+`heat, therefore `DeltaG^(o)` for the formation of `Al_(2)O_(3)` is lower in comparison to `DeltaG^(o)` for the formation of `Cr_(2)O_(3)`.