NTA Abhyas NEET2020ChemistryElectrochemistryPractice
On the basis of the information available from the reaction, 4 / 3 Al + O 2 → 2 / 3 Al 2 O 3 ; ΔG = − 827 kJmol − 1 , the minimum e.m.f. required to carry out electrolysis of A l 2 O 3 is ( F = 96500 C m o l - 1 )
Options
- A2.14 V
- B4.28 V
- C6.42 V
- D8.56 V
Correct answer
A. 2.14 V
Step-by-step solution
Δ G = - n F E ° E ° = Δ G - n F - - 827000 - 4 × 96500 = 2.14