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

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

A. Jöns Jacob Berzelius

B. John Dalton

C. Antoine Lavoisier

D. Humphry Davy

Answer: Option A

Solution (By JKSSB Mock Tests)

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

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that yellow fever is transmitted by a specific mosquito species rather than direct human contact?

A. Walter Reed

B. Ronald Ross

C. Carlos Finlay

D. Louis Pasteur

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Correct Answer: Option A

Explanation:
Major Walter Reed led the commission that experimentally proved Carlos Finlay's theory that yellow fever is transmitted by the Aedes aegypti mosquito.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the fundamental principle of inheritance known as the Law of Independent Assortment?

A. Charles Darwin

B. Francis Crick

C. Thomas Hunt Morgan

D. Gregor Mendel

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Correct Answer: Option D

Explanation:
Gregor Mendel discovered the laws of segregation and independent assortment through careful calculation of pea hybrid phenotypes.

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Question #3

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The invention of the common chemical manufacturing system known as the Contact Process optimized production of what?

A. Ammonia

B. Hydrochloric Acid

C. Nitric Acid

D. Sulfuric Acid

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Correct Answer: Option D

Explanation:
Peregrine Phillips patented the contact process in 1831, using platinum catalysts to convert sulfur dioxide into sulfur trioxide.

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