Who discovered that the chemical element Chromium is isolated from Siberian red lead ore matrices? MCQ with Answer and Explanation

Question
Who discovered that the chemical element Chromium is isolated from Siberian red lead ore matrices?
A. Carl Wilhelm Scheele
B. Martin Heinrich Klaproth
C. Louis-Nicolas Vauquelin
D. Antoine Lavoisier
Answer: Option C
Solution (By JKSSB Mock Tests)
Vauquelin isolated chromium in 1797 by treating crocoite mineral crystals with hydrochloric acid compounds.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who discovered that atomic elements possess unique magnetic configuration properties that line split inside specialized oven beam devices?
A. Werner Heisenberg
B. Wolfgang Pauli
C. Niels Bohr
D. Otto Stern and Walther Gerlach
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Correct Answer: Option D

Explanation:
The Stern-Gerlach experiment in 1922 physically demonstrated spatial quantization and electron spin attributes.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The invention of the highly reflective silver glass surface mirror layout was developed by which chemist?
A. Robert Bunsen
B. Antoine Lavoisier
C. Justus von Liebig
D. Carl Wilhelm Scheele
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Correct Answer: Option C

Explanation:
Liebig developed the chemical process of depositing thin metallic silver onto glass panes using chemical reduction reactions in 1835.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the modern mechanical wristwatch was popularized for military utility by which brand/designer?
A. Abraham-Louis Breguet
B. John Harrison
C. Patek Philippe
D. Louis Cartier
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Correct Answer: Option D

Explanation:
Louis Cartier created the Santos wristwatch in 1904 for pilot Alberto Santos-Dumont, popularizing men's portable wrist watches over pocket variants.
This question belongs to: Static General Knowledge Inventions and Discoveries
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