Who discovered that the element Uranium is isolated from pitchblende mineral ores, naming it after a newly found planet? MCQ with Answer and Explanation

Question

Who discovered that the element Uranium is isolated from pitchblende mineral ores, naming it after a newly found planet?

A. Jöns Jacob Berzelius

B. Henri Becquerel

C. Carl Wilhelm Scheele

D. Martin Heinrich Klaproth

Answer: Option D

Solution (By JKSSB Mock Tests)

Klaproth isolated a uranium compound oxide in 1789, naming it in honor of Herschel's discovery of the planet Uranus.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the biological mechanism of continuous cell culturing, establishing the immortal 'HeLa cell line' in 1951?

A. Jonas Salk

B. Alexander Fleming

C. George Otto Gey

D. Robert Koch

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Correct Answer: Option C

Explanation:
George Gey isolated and successfully cultivated cervical cancer tissue cells from Henrietta Lacks without them dying out in laboratory vessels.

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Question #2

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The invention of the wind tunnel for testing aerodynamic structures was first successfully built by whom?

A. Francis Herbert Wenham

B. Wright Brothers

C. Gustave Eiffel

D. Otto Lilienthal

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Correct Answer: Option A

Explanation:
Francis Herbert Wenham designed and operated the first enclosed operational wind tunnel in 1871 for the Aeronautical Society of Great Britain.

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Question #3

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Who discovered that light velocity shifts slightly depending on whether it moves parallel or perpendicular to the Earth's orbit, leading to the famous null result?

A. Albert Einstein

B. Hendrik Lorentz

C. Albert Michelson and Edward Morley

D. James Clerk Maxwell

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Correct Answer: Option C

Explanation:
The Michelson-Morley experiment in 1887 found no evidence of the hypothetical luminiferous aether, laying the ground for relativity.

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