Who discovered the law of gas volume variations under changing pressures, known as the first gas law? MCQ with Answer and Explanation

Question
Who discovered the law of gas volume variations under changing pressures, known as the first gas law?
A. Jacques Charles
B. Amadeo Avogadro
C. Robert Boyle
D. Joseph Louis Gay-Lussac
Answer: Option C
Solution (By JKSSB Mock Tests)
Robert Boyle published Boyle's Law in 1662, establishing that pressure and volume of a gas are inversely proportional at constant temperature.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who invented the mechanical cotton spinning machine known as the 'Spinning Jenny' in 1764?
A. James Hargreaves
B. Eli Whitney
C. Richard Arkwright
D. Samuel Crompton
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Correct Answer: Option A

Explanation:
James Hargreaves invented the multi-spool spinning frame, significantly accelerating yarn production in early textile factories.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered that the Milky Way is just one of many distinct independent galaxy clusters across space?
A. Edwin Hubble
B. William Herschel
C. Galileo Galilei
D. Johannes Kepler
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Correct Answer: Option A

Explanation:
Hubble identified Cepheid variable stars in the Andromeda Nebula, computing its enormous distance outside our own galactic boundaries.
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Question #3
Who discovered the presence of the complex radioactive element Plutonium in 1940?
A. Enrico Fermi
B. Lise Meitner
C. Otto Hahn
D. Glenn T. Seaborg and his team
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Correct Answer: Option D

Explanation:
Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl isolated plutonium-238 via deuteron bombardment of uranium.
This question belongs to: Static General Knowledge Inventions and Discoveries
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