Carbon cannot be used in the reduction of `A1_(2)O_(3)` because:

Options

A. it is an expensive
B. the enthalpy of formation of `CO_(2)` is more than that of `AI_(2)O_(3)`
C. pure carbon is not easily available
D. the enthalpy of formation of `AI_(2)O_(3)` is too high

Answer

D

Explanation

`DeltaH_(f)` for `AI_(2)O_(3)` is very high `:'` stasicity `uarr uarr`