Question

The quantity of charge required to obtain one mole of aluminium from Al2O3 is ___________. (i) 1F (ii) 6F (iii) 3F (iv) F NCERT Class XII Chemistry - Exemplar Problems Chapter 3. Electroche mistry

Answer 1

Al (+3) +3elclectron =Al

so we need 3F...
1 mole electrons = 1F

Answer 2

Answer:

The quantity of charge required to obtain one mole of aluminium from Al2O3 is 3F.

Explanation:

The quantity of charge required to obtain one mole of aluminium from Al2O3 is 3F.

Al2O3 on electrolysis gives rise to 2 Al+3 ions and 3 O-2 ions.

To get neutralised Al atom the charges are to be neutralised.

Hence to neutralise Al+3 ions 3F are required.