Until the nineteenth Century, aluminium was almost as expensive as gol

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» The correct option is: (c) Charles-Martin Hall Explanation: Charles Martin Hall was an American inventor, businessman and chemist. He is best known for his invention in 1886 of an inexpensive method for producing aluminium which became the first metal to attain wide spread use since the prehistoric discovery of iron.

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»

The correct option is: (c) Charles-Martin Hall

Explanation:

Charles Martin Hall was an American inventor, businessman and chemist. He is best known for his invention in 1886 of an inexpensive method for producing aluminium which became the first metal to attain wide spread use since the prehistoric discovery of iron.

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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

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