HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistryp-Block (group 13 and 14)Achiever Section
Anodised aluminium is :
A.Al obtained at anode✓ Correct
B.Al prepared electrolytically
C.alloy of Al containing 95% Al
D.Al electrolytically coated with aluminium oxide
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 + - + - + - + ® + + ® + ® +
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