Who discovered that the chemical element Magnesium is isolated as a distinct metal element via mercury amalgamation? MCQ with Answer and Explanation

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Who discovered that the chemical element Magnesium is isolated as a distinct metal element via mercury amalgamation?

A. Antoine Lavoisier

B. Humphry Davy

C. Joseph Black

D. Carl Wilhelm Scheele

Answer: Option B

Solution (By JKSSB Mock Tests)

Black identified magnesium compounds early, but Sir Humphry Davy isolated pure metallic magnesium via electrochemical processing in 1808.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The barometers, used to measure atmospheric pressure, was invented by whom?

A. Blaise Pascal

B. Evangelista Torricelli

C. Robert Boyle

D. Otto von Guericke

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Correct Answer: Option B

Explanation:
Evangelista Torricelli, an Italian physicist, invented the mercury barometer in 1643.

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Question #2

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The invention of the carbon-14 dating technique to determine the age of organic materials was developed by whom?

A. Marie Curie

B. Ernest Rutherford

C. Otto Hahn

D. Willard Libby

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Correct Answer: Option D

Explanation:
Willard Libby led the team that developed radiocarbon dating in 1949, winning the 1960 Nobel Prize in Chemistry.

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Question #3

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The invention of the common chemical process for production of sodium carbonate (soda ash) from salt and limestone is named after whom?

A. Ernest Solvay

B. Nicolas Leblanc

C. Fritz Haber

D. Carl Bosch

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Correct Answer: Option B

Explanation:
Nicolas Leblanc patented the early synthetic soda ash manufacturing method in 1791, satisfying early industrial glass and soap production needs.

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