Carbon cannot be used in the reduction of ${\rm{A}}{{\rm{l}}_2}{{\rm{O}}_3}$ because

The enthalpy of formation of ${\rm{A}}{{\rm{l}}_2}{{\rm{O}}_3}$ is too high

The enthalpy of formation of ${\rm{C}}{{\rm{O}}_2}$ is more than that of ${\rm{A}}{{\rm{l}}_2}{{\rm{O}}_3}$

Pure carbon is not easily available

NEET UG CHEMISTRY MCQ: 14 TH GROUP ELEMENTS (P-BLOCK)

1 Medium

1 of 1

Understanding +4 | -1

Carbon cannot be used in the reduction of

\mathrm{A}{\mathrm{l}_2}{\mathrm{O}_3}

because

View answer and explanation

Correct option: D

The enthalpy of formation of

\mathrm{A}{\mathrm{l}_2}{\mathrm{O}_3}

is too high

Option D is correct because the enthalpy of formation of

Al_2O_3

is extremely high, making it thermodynamically unfavorable to reduce with carbon.