Who invented the first mass-produced synthetic plastic material, Bakelite, in 1907? MCQ with Answer and Explanation

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Who invented the first mass-produced synthetic plastic material, Bakelite, in 1907?

A. John Wesley Hyatt

B. Leo Baekeland

C. Alexander Parkes

D. Wallace Carothers

Answer: Option B

Solution (By JKSSB Mock Tests)

Belgian-American chemist Leo Baekeland invented Bakelite, the first fully synthetic plastic valued for its electrical non-conductivity.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the optical law of refraction independently, which relates the angles of incidence and refraction?

A. Isaac Newton

B. Willebrord Snellius

C. René Descartes

D. Christiaan Huygens

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Correct Answer: Option B

Explanation:
Willebrord Snellius formulated the law of refraction (Snell's Law) in 1621, determining refractive index constants.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the first recognized hormonal messenger molecule in the human body, Secretin?

A. Charles Best

B. Frederick Banting

C. Karl Landsteiner

D. William Bayliss and Ernest Starling

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Correct Answer: Option D

Explanation:
Bayliss and Starling isolated secretin in 1902, discovering chemical signaling loops that function independently of direct nervous inputs.

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Question #3

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Who discovered that biological chemical energy transfers are regulated by specific high-energy nucleotide molecules called ATP?

A. Hans Krebs

B. Eduard Buchner

C. Fritz Lipmann

D. Karl Lohmann

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Correct Answer: Option D

Explanation:
Karl Lohmann isolated Adenosine Triphosphate from muscle tissues in 1929, identifying it as the universal intracellular energy currency.

This question belongs to: Static General Knowledge Inventions and Discoveries

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