Who discovered that the chemical element Titanium is isolated from dark mineral iron sand matrices? MCQ with Answer and Explanation

Question
Who discovered that the chemical element Titanium is isolated from dark mineral iron sand matrices?
A. William Gregor
B. Martin Heinrich Klaproth
C. Antoine Lavoisier
D. Jöns Jacob Berzelius
Answer: Option A
Solution (By JKSSB Mock Tests)
English clergyman William Gregor discovered titanium in ilmenite mineral sands in 1791, naming it 'menaccanite'.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who discovered insulin, saving millions of lives affected by diabetes?
A. Frederick Banting and Charles Best
B. Robert Koch
C. Edward Jenner
D. Alexander Fleming
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Correct Answer: Option A

Explanation:
Sir Frederick Banting, along with Charles Best and John Macleod, isolated insulin in 1921-1922.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered that light waves shift in frequency relative to the relative motion between the source and observer?
A. Christian Doppler
B. Heinrich Hertz
C. Edwin Hubble
D. Albert Einstein
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Correct Answer: Option A

Explanation:
Christian Doppler proposed the Doppler Effect in 1842, which applies uniformly to both acoustic sound pitch adjustments and optical stellar shifts.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who discovered the principles of vaccination, microbial fermentation, and pasteurization?
A. Antonie van Leeuwenhoek
B. Edward Jenner
C. Robert Koch
D. Louis Pasteur
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Correct Answer: Option D

Explanation:
Louis Pasteur's extensive contributions include vaccines for rabies and anthrax, pasteurization, and germ theory breakthroughs.
This question belongs to: Static General Knowledge Inventions and Discoveries
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