Who discovered the noble gas Helium in the solar spectrum before it was found on Earth? MCQ with Answer and Explanation
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Question #1
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The invention of the highly flexible modern structural material known as Synthetic Rubber (Buna) was developed where?
Correct Answer: Option C
Explanation:
German chemists synthesized sodium-catalyzed butadiene copolymers (Buna-S and Buna-N) to secure alternative industrial resources.
German chemists synthesized sodium-catalyzed butadiene copolymers (Buna-S and Buna-N) to secure alternative industrial resources.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who invented the first practical mechanical television system?
Correct Answer: Option D
Explanation:
John Logie Baird demonstrated the first working mechanical television system in the 1920s.
John Logie Baird demonstrated the first working mechanical television system in the 1920s.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the common lead pencil using graphite strips encased in wooden cylinders was patented in its modern form by whom?
Correct Answer: Option C
Explanation:
Nicolas-Jacques Conté patented the process of mixing powdered graphite with clay and baking it to create modern pencil leads in 1795.
Nicolas-Jacques Conté patented the process of mixing powdered graphite with clay and baking it to create modern pencil leads in 1795.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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