The invention of the common synthetic plastic material known as Polyvinyl Chloride (PVC) was optimized by whom? MCQ with Answer and Explanation

Question
The invention of the common synthetic plastic material known as Polyvinyl Chloride (PVC) was optimized by whom?
A. Leo Baekeland
B. Roy Plunkett
C. Wallace Carothers
D. Waldo Semon
Answer: Option D
Solution (By JKSSB Mock Tests)
Waldo Semon added specialized plasticizing agents to brittle PVC material in the 1920s, transforming it into a flexible, highly useful industrial plastic.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Practice More Inventions and Discoveries Questions

Question #1
Who invented the electrocardiogram (ECG/EKG) device, winning a Nobel Prize in 1924?
A. Robert Koch
B. Alexander Fleming
C. Hans Berger
D. Willem Einthoven
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Correct Answer: Option D

Explanation:
Willem Einthoven invented the first practical electrocardiogram in 1903 and received the Nobel Prize for it.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered Nitrogen element in 1772?
A. Carl Wilhelm Scheele
B. Joseph Priestley
C. Henry Cavendish
D. Daniel Rutherford
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Correct Answer: Option D

Explanation:
Scottish physician Daniel Rutherford isolated nitrogen in 1772, calling it 'noxious air'.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who discovered the law of electromagnetic induction in 1831?
A. Hans Christian Ørsted
B. James Clerk Maxwell
C. Heinrich Hertz
D. Michael Faraday
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Correct Answer: Option D

Explanation:
Michael Faraday discovered electromagnetic induction, leading to the development of electric generators and transformers.
This question belongs to: Static General Knowledge Inventions and Discoveries
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