Until the nineteenth Century, aluminium was almost as expensive as go – McqOptions

MCQOPTIONS

1.	Until the nineteenth Century, aluminium was almost as expensive as gold. The invention of an inexpensive way to extract this metal by a 22-year old American made this metal inexpensive subsequently. The inventor was?
A.	Goldschmidt
B.	Mond
C.	Charles-Martin Hall
D.	Parkes
Answer» D. Parkes

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