The invention of high-strength Kevlar fiber, used in body armor, is credited to which female chemist? MCQ with Answer and Explanation

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The invention of high-strength Kevlar fiber, used in body armor, is credited to which female chemist?

A. Marie Curie

B. Dorothy Hodgkin

C. Stephanie Kwolek

D. Rosalind Franklin

Answer: Option C

Solution (By JKSSB Mock Tests)

Stephanie Kwolek invented the exceptionally strong synthetic fiber Kevlar at DuPont in 1965.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that atomic particle paths can be tracked via condensation trails inside gas chambers, establishing the Cloud Chamber?

A. J.J. Thomson

B. Charles Thomson Rees Wilson

C. Robert Millikan

D. Ernest Rutherford

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Correct Answer: Option B

Explanation:
C.T.R. Wilson invented the cloud chamber in 1911 to study cloud formations, which became an invaluable tool for nuclear tracking and cosmic ray discoveries.

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Question #2

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The invention of the common matchstick containing phosphorus triggered by friction was developed by whom?

A. Robert Boyle

B. Humphry Davy

C. John Walker

D. Antoine Lavoisier

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Correct Answer: Option C

Explanation:
English chemist John Walker invented the first friction match in 1826 by coating cardboard or wooden splints with sulfide pastes.

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Question #3

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Who discovered that the velocity of sound in a gas depends directly on the ratio of specific heats?

A. Christiaan Huygens

B. Isaac Newton

C. Robert Boyle

D. Pierre-Simon Laplace

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Correct Answer: Option D

Explanation:
Laplace corrected Newton's isothermal calculation of sound speed by incorporating adiabatic heating/cooling factors.

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