Who discovered the atomic element Radium alongside his wife Marie Skłodowska-Curie? MCQ with Answer and Explanation

Question
Who discovered the atomic element Radium alongside his wife Marie Skłodowska-Curie?
A. Pierre Curie
B. Ernest Rutherford
C. Henri Becquerel
D. J.J. Thomson
Answer: Option A
Solution (By JKSSB Mock Tests)
Pierre Curie collaborated deeply with Marie Curie to physically extract radium chloride from radioactive raw pitchblende matrices.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who invented the liquid-fueled rocket engine, launching the world's first successful prototype in 1926?
A. Robert Goddard
B. Wernher von Braun
C. Konstantin Tsiolkovsky
D. Hermann Oberth
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Correct Answer: Option A

Explanation:
Robert H. Goddard launched the first liquid-fueled rocket (using gasoline and liquid oxygen) in Auburn, Massachusetts.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who invented the safety elevator in 1852, which prevented the cab from falling if the cable broke?
A. Thomas Edison
B. James Watt
C. Elisha Otis
D. Henry Bessemer
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Correct Answer: Option C

Explanation:
Elisha Otis invented the elevator safety brake in 1852, making skyscrapers practical and safe.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the modern pneumatic tire containing compressed inner air tubes was patented by which developer?
A. Karl Benz
B. Charles Goodyear
C. Robert William Thomson
D. John Boyd Dunlop
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Correct Answer: Option D

Explanation:
John Boyd Dunlop patented a highly successful commercial pneumatic tire in 1888 for his son's tricycle, reducing operational friction.
This question belongs to: Static General Knowledge Inventions and Discoveries
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