Who discovered that structural chemical atoms are arranged in strict configurations characterized by coordination numbers, founding inorganic stereochemistry? MCQ with Answer and Explanation

Question

Who discovered that structural chemical atoms are arranged in strict configurations characterized by coordination numbers, founding inorganic stereochemistry?

A. Linus Pauling

B. Dmitri Mendeleev

C. Alfred Werner

D. Gilbert Lewis

Answer: Option C

Solution (By JKSSB Mock Tests)

Alfred Werner proposed the coordination theory of complex inorganic compounds, winning the 1913 Nobel Prize in Chemistry.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that the chemical element Silicon is isolated from silica sands via reduction with potassium metal?

A. John Dalton

B. Jöns Jacob Berzelius

C. Antoine Lavoisier

D. Humphry Davy

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Correct Answer: Option B

Explanation:
Berzelius successfully isolated pure amorphous elemental silicon in 1824 by heating potassium fluorosilicate.

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Question #2

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Who discovered ultraviolet radiation in 1801, shortly after Herschel's discovery of infrared?

A. Heinrich Hertz

B. William Herschel

C. Johann Wilhelm Ritter

D. Wilhelm Röntgen

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Correct Answer: Option C

Explanation:
Johann Wilhelm Ritter discovered 'chemical rays' (ultraviolet light) by observing how silver chloride reacted to invisible rays past the violet spectrum.

This question belongs to: Static General Knowledge Inventions and Discoveries