Who discovered that the planet Saturn possesses a wide gap inside its ring bands, known as the Cassini Division? MCQ with Answer and Explanation

Question
Who discovered that the planet Saturn possesses a wide gap inside its ring bands, known as the Cassini Division?
A. Giovanni Domenico Cassini
B. Galileo Galilei
C. William Herschel
D. Christiaan Huygens
Answer: Option A
Solution (By JKSSB Mock Tests)
Cassini discovered the distinct gap separating Saturn's A and B rings in 1675 from the Paris Observatory.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the common mechanical thermometer scale fixed at 0 for freezing and 100 for boiling water was done by whom?
A. Daniel Gabriel Fahrenheit
B. Lord Kelvin
C. René Antoine Ferchault de Réaumur
D. Anders Celsius
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Correct Answer: Option D

Explanation:
Swedish astronomer Anders Celsius proposed the centigrade temperature scale in 1742.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The discovery of heavy water (deuterium oxide) was achieved by which physical chemist?
A. Enrico Fermi
B. Otto Hahn
C. Gilbert N. Lewis
D. Harold Urey
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Correct Answer: Option D

Explanation:
Harold Urey isolated deuterium in 1931 by fractionally distilling liquid hydrogen, winning the 1934 Nobel Prize in Chemistry.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the common chemical element symbol notation system ($H, O, Ca$) used today was developed by whom?
A. Dmitri Mendeleev
B. Jöns Jacob Berzelius
C. Antoine Lavoisier
D. John Dalton
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Correct Answer: Option B

Explanation:
Berzelius introduced letter symbols based on Latin element names in 1813, replacing Dalton's cumbersome symbolic diagrams.
This question belongs to: Static General Knowledge Inventions and Discoveries
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