General Knowledge MCQs
Topic Notes: General Knowledge
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
971
Who is the inventor of the USB (Universal Serial Bus)?
Answer:
Ajay Bhatt
Ajay Bhatt, an Indian-American computer architect at Intel, led the team that created the USB standard.
972
Who invented the mercury thermometer?
Answer:
Daniel Gabriel Fahrenheit
Daniel Gabriel Fahrenheit invented the mercury-in-glass thermometer in 1714.
973
Who is credited with discovering the concept of 'Zero' as a number?
Answer:
Aryabhata / Brahmagupta
The concept of Zero as a number and a placeholder is attributed to ancient Indian mathematicians, notably Brahmagupta and Aryabhata.
974
Who invented the revolver?
Answer:
Samuel Colt
Samuel Colt patented the first commercially successful revolving cylinder pistol (revolver) in 1836.
975
Who invented the modern air conditioner?
Answer:
Willis Carrier
Willis Carrier invented the first modern electrical air conditioning unit in 1902.
976
Who discovered the structure of DNA?
Answer:
Watson and Crick
James Watson and Francis Crick, using data from Rosalind Franklin, identified the double-helix structure of DNA in 1953.
977
Who invented the safety razor?
Answer:
King Camp Gillette
King Camp Gillette invented the best-selling version of the safety razor with disposable blades in 1901.
978
Who invented the barometer?
Answer:
Evangelista Torricelli
Evangelista Torricelli, a student of Galileo, invented the barometer in 1643 for measuring atmospheric pressure.
979
Who discovered vaccination (Smallpox vaccine)?
Answer:
Edward Jenner
Edward Jenner developed the smallpox vaccine in 1796, which was the world's first vaccine.
980
Who created the Periodic Table of Elements?
Answer:
Dmitri Mendeleev
Dmitri Mendeleev formulated the Periodic Law and created the first version of the Periodic Table of Elements in 1869.