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- This technique for extracting gold was discovered by chemist Carl Wilhelm Scheele in 1783, and was later developed in 1887 by John Seward MacArthur.
Question 1:
This technique for extracting gold was discovered by chemist Carl Wilhelm Scheele in 1783, and was later developed in 1887 by John Seward MacArthur.
A. Gold cyanidation
B. Gold zincanization
C. Hydraulic mining
D. Gold panning
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