The invention of the common chemical matchstick containing safer amorphous red phosphorus instead of toxic white phosphorus is called what? MCQ with Answer and Explanation
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Question #1
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Who discovered the first human virus ever identified, the Yellow Fever virus?
Correct Answer: Option B
Explanation:
The U.S. Army Yellow Fever Commission led by Walter Reed isolated and proved the disease was caused by a filterable virus vector.
The U.S. Army Yellow Fever Commission led by Walter Reed isolated and proved the disease was caused by a filterable virus vector.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The invention of the common mechanical transport mechanism known as the bicycle chain drive system was optimized by whom?
Correct Answer: Option A
Explanation:
Starley engineered the 'Rover Safety Bicycle' in 1885, featuring equal-sized wheels and rear-wheel chain driving mechanisms.
Starley engineered the 'Rover Safety Bicycle' in 1885, featuring equal-sized wheels and rear-wheel chain driving mechanisms.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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Who discovered ultraviolet radiation in 1801, shortly after Herschel's discovery of infrared?
Correct Answer: Option D
Explanation:
Johann Wilhelm Ritter discovered 'chemical rays' (ultraviolet light) by observing how silver chloride reacted to invisible rays past the violet spectrum.
Johann Wilhelm Ritter discovered 'chemical rays' (ultraviolet light) by observing how silver chloride reacted to invisible rays past the violet spectrum.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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