Who discovered that atomic radioactive decay emits discrete high-energy electromagnetic waves named 'Gamma Rays'? MCQ with Answer and Explanation
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Question #1
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Who invented the first practical modern typewriter with a QWERTY keyboard layout?
Correct Answer: Option B
Explanation:
Christopher Latham Sholes invented the first commercially practical mechanical typewriter and developed the QWERTY keyboard layout to prevent jamming.
Christopher Latham Sholes invented the first commercially practical mechanical typewriter and developed the QWERTY keyboard layout to prevent jamming.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who discovered the exact structural formula of the complex molecule Vitamin B12, using advanced X-ray crystallography?
Correct Answer: Option A
Explanation:
Dorothy Hodgkin determined the atomic structures of penicillin, vitamin B12, and insulin, winning the 1964 Nobel Prize in Chemistry.
Dorothy Hodgkin determined the atomic structures of penicillin, vitamin B12, and insulin, winning the 1964 Nobel Prize in Chemistry.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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Who discovered the planet Pluto in 1930 at the Lowell Observatory?
Correct Answer: Option B
Explanation:
Clyde Tombaugh discovered Pluto by comparing photographic plates using a blink comparator instrument.
Clyde Tombaugh discovered Pluto by comparing photographic plates using a blink comparator instrument.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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