Who discovered the planet Neptune using mathematical calculations before it was verified by telescope? MCQ with Answer and Explanation

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Who discovered the planet Neptune using mathematical calculations before it was verified by telescope?

A. Galileo Galilei

B. William Herschel

C. Urbain Le Verrier and John Couch Adams

D. Johannes Kepler

Answer: Option C

Solution (By JKSSB Mock Tests)

Urbain Le Verrier and John Couch Adams independently calculated the location of Neptune based on irregularities in Uranus's orbit.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the antibiotic Streptomycin, the first effective cure for tuberculosis, winning a Nobel Prize in 1952?

A. Edward Abraham

B. Alexander Fleming

C. Selman Waksman

D. Howard Florey

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Correct Answer: Option C

Explanation:
Selman Waksman discovered several antibiotics produced by soil microbes, including streptomycin.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the specific virus responsible for tobacco mosaic disease, launching the scientific discipline of Virology?

A. Dmitri Ivanovsky and Martinus Beijerinck

B. Alexander Fleming

C. Robert Koch

D. Louis Pasteur

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Correct Answer: Option A

Explanation:
Ivanovsky found that infected extracts remain contagious after chamber porcelain filtration; Beijerinck termed the fluid agent a 'virus'.

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Question #3

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Who discovered that cosmic celestial entities emit radio signals, establishing the branch of Radio Astronomy?

A. Guglielmo Marconi

B. Edwin Hubble

C. Karl Jansky

D. Grote Reber

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Correct Answer: Option C

Explanation:
Jansky discovered radio emission noise origins from the galactic center in 1931 using directional rotating antenna arrays at Bell Labs.

This question belongs to: Static General Knowledge Inventions and Discoveries

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