The invention of the common industrial building material known as Portland Cement was patented by whom? MCQ with Answer and Explanation

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The invention of the common industrial building material known as Portland Cement was patented by whom?

A. Joseph Aspdin

B. James Watt

C. Henry Bessemer

D. Thomas Telford

Answer: Option A

Solution (By JKSSB Mock Tests)

Aspdin patented the chemical calcination formulation of limestone and clay mixtures in England in 1824.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the existence of the Van Allen Radiation Belts surrounding the Earth?

A. Wernher von Braun

B. James Van Allen

C. Robert Goddard

D. Carl Sagan

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Correct Answer: Option B

Explanation:
James Van Allen discovered the zones of trapped charged particles around Earth using data from the Explorer 1 satellite in 1958.

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Question #2

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

A. Max von Laue

B. William Henry Bragg

C. Rosalind Franklin

D. Wilhelm Röntgen

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Correct Answer: Option A

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

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The invention of the cotton gin, which automated the extraction of seeds from cotton fiber, is credited to whom?

A. Samuel Crompton

B. Richard Arkwright

C. James Hargreaves

D. Eli Whitney

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Correct Answer: Option D

Explanation:
Eli Whitney patented the cotton gin in 1794, revolutionizing the cotton industry in the United States.

This question belongs to: Static General Knowledge Inventions and Discoveries

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