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 #161
Who invented the first practical electronic synthesizer instrument, altering modern music composition?
A. Leo Fender
B. Robert Moog
C. Thomas Edison
D. Laurens Hammond
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Correct Answer: Option B

Explanation:
Robert Moog invented the Moog synthesizer in the 1960s, introducing voltage-controlled modular electronic instrumentation.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #162
The modern concept of the chemical bond via shared pairs of electrons (covalent bond) was discovered by whom?
A. John Dalton
B. Svante Arrhenius
C. Linus Pauling
D. Gilbert N. Lewis
Discuss
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Correct Answer: Option D

Explanation:
Gilbert N. Lewis introduced electron-dot structures and developed the electronic theory of chemical bonding in 1916.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #163
Who discovered the first known antibiotic substance produced by soil actinomycetes, Actinomycin?
A. Louis Pasteur
B. Alexander Fleming
C. Selman Waksman
D. Robert Koch
Discuss
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Correct Answer: Option C

Explanation:
Selman Waksman and his student H. Boyd Woodruff isolated actinomycin in 1940, sparking targeted soil microbe screening programs.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #164
The invention of the safety razor with disposable stamped steel blades was introduced by whom?
A. Elisha Otis
B. King Camp Gillette
C. John Loud
D. Walter Hunt
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Correct Answer: Option B

Explanation:
King Camp Gillette patented the safety razor system with cheap, replaceable double-edged blades in 1904.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #165
Who discovered that the velocity of sound in a gas depends directly on the ratio of specific heats?
A. Isaac Newton
B. Robert Boyle
C. Pierre-Simon Laplace
D. Christiaan Huygens
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Correct Answer: Option C

Explanation:
Laplace corrected Newton's isothermal calculation of sound speed by incorporating adiabatic heating/cooling factors.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #166
The invention of the wind tunnel for testing aerodynamic structures was first successfully built by whom?
A. Gustave Eiffel
B. Wright Brothers
C. Francis Herbert Wenham
D. Otto Lilienthal
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Correct Answer: Option C

Explanation:
Francis Herbert Wenham designed and operated the first enclosed operational wind tunnel in 1871 for the Aeronautical Society of Great Britain.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #167
Who discovered that electrical currents travel along the exterior surface of a conductor rather than uniformly through its core?
A. Michael Faraday
B. Heinrich Hertz
C. Nikola Tesla
D. James Clerk Maxwell
Discuss
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Correct Answer: Option A

Explanation:
Michael Faraday discovered the skin effect and structural shielding principles, leading to the creation of the Faraday Cage.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #168
The first practical high-pressure steam engine was constructed by which mechanical pioneer?
A. Richard Trevithick
B. James Watt
C. George Stephenson
D. Thomas Newcomen
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Correct Answer: Option A

Explanation:
Richard Trevithick built high-pressure industrial engines capable of generating high power outputs from lightweight boilers.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #169
Who discovered the law of thermal radiation stating that emissivity equals absorptivity at thermal equilibrium?
A. Wilhelm Wien
B. Max Planck
C. Josef Stefan
D. Gustav Kirchhoff
Discuss
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Correct Answer: Option D

Explanation:
Gustav Kirchhoff formulated Kirchhoff's Law of Thermal Radiation in 1859, standardizing spectroscopy and thermodynamic modeling.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #170
The invention of the flash memory architecture, ubiquitous in USB drives and SSDs, was developed by whom?
A. Tim Berners-Lee
B. Fujio Masuoka
C. Alan Turing
D. Douglas Engelbart
Discuss
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Correct Answer: Option B

Explanation:
Fujio Masuoka invented both NOR and NAND flash memory while working at Toshiba in the 1980s.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #171
Who discovered the planet Ceres, the first recognized asteroid, in 1801?
A. Heinrich Olbers
B. William Herschel
C. Johannes Kepler
D. Giuseppe Piazzi
Discuss
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Correct Answer: Option D

Explanation:
Italian astronomer Giuseppe Piazzi discovered Ceres on January 1, 1801, initially cataloging it as a new comet or planet.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #172
Who invented the modern zipper mechanism with interlocking teeth in its final commercial form?
A. Walter Hunt
B. Gideon Sundback
C. Whitcomb Judson
D. Elias Howe
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Correct Answer: Option B

Explanation:
Gideon Sundback modified earlier primitive clasp locker designs into the modern 'Hookless Fastener' or zipper in 1913.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #173
The discovery of the restriction enzymes, which slice DNA at specific sequences, revolutionized genetic engineering under which scientist?
A. James Watson and Francis Crick
B. Kary Mullis
C. Paul Berg
D. Werner Arber, Hamilton Smith, and Daniel Nathans
Discuss
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Correct Answer: Option D

Explanation:
These three scientists received the 1978 Nobel Prize for discovering restriction endonucleases and applying them to molecular genetics.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #174
Who invented the first practical electronic calculator utilizing a microprocessor chip?
A. Charles Babbage
B. John von Neumann
C. Alan Turing
D. Busicom team and Intel (Masatoshi Shima, Ted Hoff)
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Correct Answer: Option D

Explanation:
The partnership between Busicom and Intel led to the invention of the Intel 4004, the first commercial programmable microprocessor.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #175
Who discovered the fundamental principle of superconduction in metals at temperatures near absolute zero?
A. Lord Kelvin
B. Heike Kamerlingh Onnes
C. Max Planck
D. Johannes Diderik van der Waals
Discuss
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Correct Answer: Option B

Explanation:
Heike Kamerlingh Onnes discovered superconductivity in solid mercury cooled to 4.2 Kelvin using liquid helium in 1911.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #176
The invention of the common matchstick containing phosphorus triggered by friction was developed by whom?
A. Robert Boyle
B. Antoine Lavoisier
C. Humphry Davy
D. John Walker
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Correct Answer: Option D

Explanation:
English chemist John Walker invented the first friction match in 1826 by coating cardboard or wooden splints with sulfide pastes.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #177
Who discovered the optical law of refraction independently, which relates the angles of incidence and refraction?
A. Willebrord Snellius
B. René Descartes
C. Christiaan Huygens
D. Isaac Newton
Discuss
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Correct Answer: Option A

Explanation:
Willebrord Snellius formulated the law of refraction (Snell's Law) in 1621, determining refractive index constants.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #178
Who invented the acoustic phonograph, capturing audio playback on tin foil cylinders?
A. Alexander Graham Bell
B. Emile Berliner
C. Nikola Tesla
D. Thomas Edison
Discuss
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Correct Answer: Option D

Explanation:
Thomas Alva Edison invented the phonograph in 1877, capturing acoustic sound waves mechanically via steel needles onto soft foils.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #179
The invention of the modern mechanical wristwatch was popularized for military utility by which brand/designer?
A. John Harrison
B. Abraham-Louis Breguet
C. Louis Cartier
D. Patek Philippe
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Correct Answer: Option C

Explanation:
Louis Cartier created the Santos wristwatch in 1904 for pilot Alberto Santos-Dumont, popularizing men's portable wrist watches over pocket variants.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #180
Who discovered that light exhibits particle-like momentum in scattering collisions with electrons, proving photon theory?
A. Albert Einstein
B. Niels Bohr
C. Arthur Compton
D. Max Planck
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Correct Answer: Option C

Explanation:
Arthur Compton discovered the Compton Effect in 1923, providing explicit proof that light acts as discrete localized particles.
This question belongs to: Static General Knowledge Inventions and Discoveries

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