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Answer to Question #52778 in Physical Chemistry for Souvik

Question #52778
Which of the following metal cannot be extracted from its aqueous solution by electrolysis? and why?
A) Ni B) Au C) Cu D) Al
Expert's answer
D) Al
Aluminium has the highest negative electrode potential of mentioned metals. In aqueous solutions aluminium will cause the electrolysis of water and extraction of hydrogen gas. That is why aluminium can be extracted only from the molten aluminium.

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