The invention of the mass spectrometer, used to separate isotopes and determine chemical composition, was developed by whom? MCQ with Answer and Explanation

Question

The invention of the mass spectrometer, used to separate isotopes and determine chemical composition, was developed by whom?

A. J.J. Thomson

B. Ernest Rutherford

C. James Chadwick

D. Francis William Aston

Answer: Option D

Solution (By JKSSB Mock Tests)

Francis William Aston built the first fully functional mass spectrograph in 1919 and discovered isotopes in non-radioactive elements.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that certain types of organic crystals display liquid fluid mobility while maintaining optical structural alignment, founding Liquid Crystals?

A. Leo Baekeland

B. Friedrich Reinitzer

C. Otto Lehmann

D. Justus von Liebig

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Correct Answer: Option B

Explanation:
Austrian botanist Reinitzer discovered the distinct dual melting profile of cholesteryl benzoate in 1888.

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Question #2

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The invention of the safety razor with disposable stamped steel blades was introduced by whom?

A. King Camp Gillette

B. Elisha Otis

C. Walter Hunt

D. John Loud

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Correct Answer: Option A

Explanation:
King Camp Gillette patented the safety razor system with cheap, replaceable double-edged blades in 1904.

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Question #3

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Who discovered the presence of the complex radioactive element Plutonium in 1940?

A. Otto Hahn

B. Enrico Fermi

C. Lise Meitner

D. Glenn T. Seaborg and his team

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Correct Answer: Option D

Explanation:
Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl isolated plutonium-238 via deuteron bombardment of uranium.

This question belongs to: Static General Knowledge Inventions and Discoveries

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