The discovery of heavy water (deuterium oxide) was achieved by which physical chemist? MCQ with Answer and Explanation

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The discovery of heavy water (deuterium oxide) was achieved by which physical chemist?

A. Enrico Fermi

B. Otto Hahn

C. Gilbert N. Lewis

D. Harold Urey

Answer: Option D

Solution (By JKSSB Mock Tests)

Harold Urey isolated deuterium in 1931 by fractionally distilling liquid hydrogen, winning the 1934 Nobel Prize in Chemistry.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the bacterium responsible for causing Tuberculosis (TB)?

A. Robert Koch

B. Edward Jenner

C. Alexander Fleming

D. Louis Pasteur

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Correct Answer: Option A

Explanation:
Robert Koch discovered Mycobacterium tuberculosis in 1882, establishing the germ theory of disease for TB.

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Question #2

Who discovered that regular arrays of atoms act as diffraction gratings for X-rays, establishing X-ray crystallography?

A. William Henry Bragg

B. Rosalind Franklin

C. Max von Laue

D. Wilhelm Röntgen

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Correct Answer: Option C

Explanation:
Max von Laue discovered X-ray diffraction by crystals in 1912, proving the wave nature of X-rays and structural lattice layouts.

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Question #3

The invention of the multi-stage flash distillation process for large-scale seawater desalination was pioneered by whom?

A. James Watt

B. Humphry Davy

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Correct Answer: Option D

Explanation:
Professor Robert Silver patented the highly efficient multi-stage flash distillation process in the late 1950s.

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