Who discovered the specific mathematical constant linking the energy of a photon to its frequency? MCQ with Answer and Explanation

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Who discovered the specific mathematical constant linking the energy of a photon to its frequency?

A. Niels Bohr

B. Max Planck

C. Werner Heisenberg

D. Albert Einstein

Answer: Option B

Solution (By JKSSB Mock Tests)

Max Planck discovered Planck's constant ($h$) as part of his derivation of blackbody radiation energy laws.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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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. Nicolas Leblanc

B. Ernest Solvay

C. Carl Bosch

D. Fritz Haber

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Correct Answer: Option A

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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Question #2

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

A. Antoine Lavoisier

B. Humphry Davy

C. Jöns Jacob Berzelius

D. John Dalton

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Correct Answer: Option C

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

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Question #3

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Who discovered the first known antibiotic substance produced by soil actinomycetes, Actinomycin?

A. Louis Pasteur

B. Selman Waksman

C. Robert Koch

D. Alexander Fleming

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Correct Answer: Option B

Explanation:
Selman Waksman and his student H. Boyd Woodruff isolated actinomycin in 1940, sparking targeted soil microbe screening programs.

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