HARDMCQ SINGLENEET ChemistryInorganic Chemistryp-Block (group 13 and 14)Achiever Section
Anodising can be done by electrolysing dilute H₂SO₄ with aluminium as anode. This results in :
A.the formation of Al₂(SO₄)₃ on the surface of
B.the formation of oxide film (Al₂O₃) on the surface of✓ Correct
C.the formation of polymeric aluminium hydride film
D.none of the above
Explanation
The half cell reactions take place at anode results in the formation of layer of aluminium oxide on the surface of aluminium. 3 3 2 2 3 3 2 3 Al Al 3e 2Al 3O Al O 2Al 3OH Al O 3H + - + - + - + ® + + ® + ® +