Who discovered the planet Uranus in 1781? MCQ with Answer and Explanation

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Who discovered the planet Uranus in 1781?

A. Giovanni Cassini

B. William Herschel

C. Christiaan Huygens

D. Galileo Galilei

Answer: Option B

Solution (By JKSSB Mock Tests)

William Herschel discovered Uranus using a telescope he built himself, making it the first planet discovered in modern history.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

The chemical element Oxygen was independently discovered by Carl Wilhelm Scheele and which other English scientist?

A. Joseph Priestley

B. Henry Cavendish

C. John Dalton

D. Humphry Davy

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Correct Answer: Option A

Explanation:
Joseph Priestley discovered oxygen in 1774 and published his findings first, though Scheele had isolated it earlier.

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Question #2

The invention of Teflon (PTFE) was an accidental discovery by which chemist in 1938?

A. Gideon Sundback

B. Wallace Carothers

C. Leo Baekeland

D. Roy Plunkett

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Correct Answer: Option D

Explanation:
Roy J. Plunkett accidentally discovered polytetrafluoroethylene (Teflon) while researching alternative chlorofluorocarbon refrigerants.

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Question #3

The invention of the common household cleaning appliance known as the electric vacuum cleaner layout was patented by whom?

A. Hubert Cecil Booth and James Murray Spangler

B. Alva Fisher

C. Willis Carrier

D. Thomas Edison

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Correct Answer: Option A

Explanation:
Booth invented the large motorized vacuum pump rig in 1901, and Spangler patented the portable fan-and-bag layout which Hoover later commercialized.

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