Inventions and Discoveries MCQs

Static General Knowledge

Inventions and Discoveries MCQs

Practice Inventions and Discoveries MCQs with answers and detailed explanations covering famous inventors, scientific discoveries, technological innovations, important inventions, groundbreaking research, Nobel-winning discoveries and contributions to science and technology frequently asked in SSC, Railway, Banking, UPSC, JKSSB, Police, Defence, Teaching and other competitive examinations.

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Question #81
The first practical mechanical sewing machine was patented by whom in 1846?
A. Elias Howe
B. Isaac Singer
C. Eli Whitney
D. Walter Hunt
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Correct Answer: Option A

Explanation:
Elias Howe patented the first practical lockstitch sewing machine in the United States in 1846.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #82
Who formulated the mathematical equations governing the unified theory of electricity, magnetism, and optics?
A. Michael Faraday
B. James Clerk Maxwell
C. Heinrich Hertz
D. Albert Einstein
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Correct Answer: Option B

Explanation:
James Clerk Maxwell formulated Maxwell's Equations, proving that light is an electromagnetic wave.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #83
Who is credited with inventing the modern ballpoint pen in 1938?
A. John Loud
B. Lewis Waterman
C. Rowland Hill
D. László Bíró
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Correct Answer: Option D

Explanation:
Hungarian journalist László Bíró invented the first commercially successful ballpoint pen, which bears his name ('Biro') in many countries.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #84
Who discovered the planet Neptune using mathematical calculations before it was verified by telescope?
A. Urbain Le Verrier and John Couch Adams
B. Johannes Kepler
C. William Herschel
D. Galileo Galilei
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Correct Answer: Option A

Explanation:
Urbain Le Verrier and John Couch Adams independently calculated the location of Neptune based on irregularities in Uranus's orbit.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #85
The invention of the cotton gin, which automated the extraction of seeds from cotton fiber, is credited to whom?
A. Samuel Crompton
B. Richard Arkwright
C. Eli Whitney
D. James Hargreaves
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Correct Answer: Option C

Explanation:
Eli Whitney patented the cotton gin in 1794, revolutionizing the cotton industry in the United States.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #86
Who discovered the process of nuclear fission in heavy elements, winning the Nobel Prize in Chemistry in 1944?
A. Enrico Fermi
B. Lise Meitner
C. Niels Bohr
D. Otto Hahn
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Correct Answer: Option D

Explanation:
German chemist Otto Hahn discovered nuclear fission of uranium in 1938 alongside Fritz Strassmann.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #87
The first practical monochrome computer mouse was invented by whom at the Stanford Research Institute?
A. Bill Gates
B. Steve Jobs
C. Alan Turing
D. Douglas Engelbart
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Correct Answer: Option D

Explanation:
Douglas Engelbart invented the computer mouse in 1964, constructed out of a wooden shell with two metallic wheels.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #88
Who discovered that blood can be categorized into various Rh factors (positive and negative)?
A. William Harvey
B. Robert Koch
C. Karl Landsteiner and Alexander Wiener
D. Edward Jenner
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Correct Answer: Option C

Explanation:
Karl Landsteiner and Alexander S. Wiener discovered the Rhesus (Rh) factor in blood in 1937.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #89
The invention of the carbon filament telephone transmitter (microphone) that improved long-distance audio was done by whom?
A. Nikola Tesla
B. Thomas Edison
C. David Edward Hughes
D. Alexander Graham Bell
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Correct Answer: Option B

Explanation:
Thomas Alva Edison invented the highly efficient carbon microphone, which became standard for telephone transmitters for decades.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #90
Who discovered that the Earth's core is divided into solid inner and liquid outer layers?
A. Andrija Mohorovičić
B. Inge Lehmann
C. Beno Gutenberg
D. Charles Richter
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Correct Answer: Option B

Explanation:
Danish seismologist Inge Lehmann discovered the Earth's solid inner core in 1936 by studying seismic wave travel paths.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #91
The concept of 'Universal Turing Machine', the structural basis for the modern digital computer, was discovered by whom?
A. Charles Babbage
B. Ada Lovelace
C. John von Neumann
D. Alan Turing
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Correct Answer: Option D

Explanation:
Alan Turing formulated the mathematical concept of a Turing Machine in 1936, simulating logical computing execution.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #92
Who invented the radar (Radio Detection and Ranging) system used by Britain during World War II?
A. Robert Watson-Watt
B. Alan Turing
C. Heinrich Hertz
D. Guglielmo Marconi
Discuss
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Correct Answer: Option A

Explanation:
Sir Robert Watson-Watt developed the first practical and deployable radar tracking systems for aircraft tracking.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #93
Who discovered the law of conservation of mass in chemical reactions?
A. Robert Boyle
B. Antoine Lavoisier
C. John Dalton
D. Joseph Priestley
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Correct Answer: Option B

Explanation:
Antoine Lavoisier formulated the Law of Conservation of Mass in 1789, proving that mass is neither created nor destroyed in chemical transformations.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #94
The invention of the mechanical calculating machine named 'Pascaline' in 1642 was completed by whom?
A. Gottfried Wilhelm Leibniz
B. Blaise Pascal
C. René Descartes
D. Charles Babbage
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Correct Answer: Option B

Explanation:
Blaise Pascal invented the Pascaline to assist his father, a tax commissioner, in performing arithmetic addition and subtraction.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #95
Who discovered that yellow fever is transmitted by a specific mosquito species rather than direct human contact?
A. Walter Reed
B. Carlos Finlay
C. Louis Pasteur
D. Ronald Ross
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Correct Answer: Option A

Explanation:
Major Walter Reed led the commission that experimentally proved Carlos Finlay's theory that yellow fever is transmitted by the Aedes aegypti mosquito.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #96
Who invented the first practical alternating current (AC) motor and power transmission system?
A. Thomas Edison
B. Michael Faraday
C. George Westinghouse
D. Nikola Tesla
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Correct Answer: Option D

Explanation:
Nikola Tesla patented the AC induction motor and polyphase system, which revolutionized long-distance electrical grid power distribution.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #97
The discovery of the cosmic rays was rewarded with a Nobel Prize to which physicist?
A. Robert Millikan
B. Arthur Compton
C. Carl Anderson
D. Victor Hess
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Correct Answer: Option D

Explanation:
Victor Hess discovered cosmic radiation by taking ionization monitoring instruments up in high-altitude balloon flights between 1911 and 1913.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #98
Who invented the first mass-produced synthetic plastic material, Bakelite, in 1907?
A. Wallace Carothers
B. John Wesley Hyatt
C. Leo Baekeland
D. Alexander Parkes
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Correct Answer: Option C

Explanation:
Belgian-American chemist Leo Baekeland invented Bakelite, the first fully synthetic plastic valued for its electrical non-conductivity.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #99
Who discovered the law of gas volume variations under changing pressures, known as the first gas law?
A. Amadeo Avogadro
B. Joseph Louis Gay-Lussac
C. Robert Boyle
D. Jacques Charles
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Correct Answer: Option C

Explanation:
Robert Boyle published Boyle's Law in 1662, establishing that pressure and volume of a gas are inversely proportional at constant temperature.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #100
The invention of the fiber-optic communication system was revolutionized by the research of which Anglo-Chinese physicist?
A. Charles K. Kao
B. C.W. Chu
C. Sumio Iijima
D. Shuji Nakamura
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Correct Answer: Option A

Explanation:
Charles K. Kao won the 2009 Nobel Prize in Physics for groundbreaking achievements concerning the transmission of light in fibers for optical communication.
This question belongs to: Static General Knowledge Inventions and Discoveries

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