The first modern nuclear reactor, Chicago Pile-1, was built under the supervision of which physicist? MCQ with Answer and Explanation

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The first modern nuclear reactor, Chicago Pile-1, was built under the supervision of which physicist?

A. Niels Bohr

B. Enrico Fermi

C. J. Robert Oppenheimer

D. Albert Einstein

Answer: Option B

Solution (By JKSSB Mock Tests)

Enrico Fermi led the team that created the first artificial self-sustaining nuclear chain reaction in 1942.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that the chemical element Iodine is isolated from seaweed ash matrices?

A. Joseph Louis Gay-Lussac

B. Bernard Courtois

C. Humphry Davy

D. Antoine Lavoisier

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Correct Answer: Option B

Explanation:
Bernard Courtois isolated violet iodine vapors accidentally in 1811 while adding excess sulfuric acid to seaweed extract solutions.

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The vaccine for smallpox was developed by whom in 1796?

A. Louis Pasteur

B. Robert Koch

C. Edward Jenner

D. Alexander Fleming

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Correct Answer: Option C

Explanation:
Edward Jenner introduced the smallpox vaccine using cowpox material, pioneering the field of vaccinology.

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Who discovered that the planet Neptune possesses a massive dark storm configuration known as the Great Dark Spot?

A. Galileo Galilei

B. Urbain Le Verrier

C. Voyager 2 NASA space probe team

D. William Herschel

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Correct Answer: Option C

Explanation:
The Voyager 2 planetary flyby in 1989 captured the first detailed atmospheric images of Neptune's large southern dark storm vortex.

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