Who discovered that the chemical element Lithium is isolated from petalite mineral matrices? MCQ with Answer and Explanation

Question
Who discovered that the chemical element Lithium is isolated from petalite mineral matrices?
A. Antoine Lavoisier
B. Jöns Jacob Berzelius
C. Johan August Arfwedson
D. Humphry Davy
Answer: Option C
Solution (By JKSSB Mock Tests)
Arfwedson discovered lithium in 1817 while analyzing mineral crystals under Berzelius's laboratory direction.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who discovered that certain elements change identities through radioactive transmutation, establishing the laws of radioactive decay?
A. Henri Becquerel
B. Marie Curie
C. Otto Hahn
D. Ernest Rutherford and Frederick Soddy
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Correct Answer: Option D

Explanation:
Rutherford and Soddy formulated the decay transformation principles, proving elements naturally break down into different elements.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who invented the modern safety pin in 1849?
A. Isaac Singer
B. Elias Howe
C. Eli Whitney
D. Walter Hunt
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Correct Answer: Option D

Explanation:
Walter Hunt invented the safety pin in 1849 and sold the patent rights for just 400 dollars to pay off a debt.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the high-velocity steam engine turbine 'De Laval' type with convergent-divergent nozzles was done by whom?
A. Thomas Newcomen
B. Charles Parsons
C. James Watt
D. Gustaf de Laval
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Correct Answer: Option D

Explanation:
Gustaf de Laval developed the specialized nozzle configuration that accelerates steam to supersonic speeds, improving kinetic transfer.
This question belongs to: Static General Knowledge Inventions and Discoveries
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