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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Practice Questions

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Question #181
The creation of the first highly precise marine chronometer ($H4$) that solved the global longitude tracking problem was done by whom?
A. Isaac Newton
B. Christiaan Huygens
C. John Harrison
D. James Cook
Discuss
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Correct Answer: Option C

Explanation:
Carpenter turned clockmaker John Harrison built specialized friction-free marine timekeepers that operated accurately on moving ships.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #182
Who discovered the presence of the Golgi apparatus within eukaryotic animal cells?
A. Santiago Ramón y Cajal
B. Camillo Golgi
C. Theodor Schwann
D. Robert Hooke
Discuss
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Correct Answer: Option B

Explanation:
Italian physician Camillo Golgi discovered the cellular organelle in 1898 using a unique silver staining procedure.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #183
Who invented the relational database management model (RDBMS), organizing data into structured rows and tables?
A. Alan Turing
B. Edgar F. Codd
C. Bill Gates
D. Larry Ellison
Discuss
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Correct Answer: Option B

Explanation:
Edgar F. Codd formulated the structural relational database design theory while working at IBM in 1970.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #184
The discovery of the charge-coupled device (CCD), which replaces film with digital sensor pixels in cameras, was made by whom?
A. Willard Boyle and George E. Smith
B. Charles Kao
C. Theodore Maiman
D. Fujio Masuoka
Discuss
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Correct Answer: Option A

Explanation:
Boyle and Smith invented the CCD at Bell Labs in 1969, fundamentally altering digital imaging, which won them a 2009 Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #185
Who discovered the phenomenon of specific biological chemical pathways known as carbon fixation or the dark reactions of photosynthesis?
A. Hans Krebs
B. Louis Pasteur
C. Melvin Calvin
D. Robert Emerson
Discuss
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Correct Answer: Option C

Explanation:
Melvin Calvin traced the pathway of carbon absorption in plants using carbon-14, establishing the Calvin-Benson Cycle.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #186
Who invented the standard mechanical marine propeller that replaced paddle wheels on ships?
A. Charles Parsons
B. Robert Fulton
C. James Watt
D. John Ericsson and Francis Pettit Smith
Discuss
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Correct Answer: Option D

Explanation:
Ericsson and Smith independently patented efficient screw propeller designs in 1836, enabling faster transoceanic transport.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #187
The discovery of heavy water (deuterium oxide) was achieved by which physical chemist?
A. Otto Hahn
B. Gilbert N. Lewis
C. Harold Urey
D. Enrico Fermi
Discuss
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Correct Answer: Option C

Explanation:
Harold Urey isolated deuterium in 1931 by fractionally distilling liquid hydrogen, winning the 1934 Nobel Prize in Chemistry.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #188
Who invented the high-pressure industrial chemical synthesis of ammonia from raw nitrogen and hydrogen gases?
A. Dmitri Mendeleev
B. Fritz Haber and Carl Bosch
C. Wilhelm Ostwald
D. Antoine Lavoisier
Discuss
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Correct Answer: Option B

Explanation:
The Haber-Bosch process synthesized ammonia efficiently on an industrial scale, revolutionizing agricultural fertilizers.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #189
The discovery of the electrical conductivity properties of semi-conductive materials under specific doping was pioneered by whom?
A. Thomas Edison
B. John Bardeen, Walter Brattain, and William Shockley
C. Nikola Tesla
D. Michael Faraday
Discuss
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Correct Answer: Option B

Explanation:
These three physicists invented the point-contact solid-state transistor at Bell Labs in 1947, replacing vacuum tubes.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #190
Who invented the first functional polymer-based synthetic rubber, Neoprene?
A. Charles Goodyear
B. Roy Plunkett
C. Leo Baekeland
D. Wallace Carothers
Discuss
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Correct Answer: Option D

Explanation:
Wallace Carothers' research group at DuPont synthesized chloroprene polymer, marketing it as Neoprene in 1931.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #191
Who discovered the law of planetary gravitation, formalizing that attractive force is inversely proportional to square distance?
A. Robert Hooke
B. Johannes Kepler
C. Galileo Galilei
D. Isaac Newton
Discuss
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Correct Answer: Option D

Explanation:
Sir Isaac Newton published the Universal Law of Gravitation in his monumental work 'Principia Mathematica' in 1687.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #192
The invention of the first practical household mechanical washing machine is attributed to which developer?
A. Elisha Otis
B. Thomas Edison
C. Alva J. Fisher
D. Walter Hunt
Discuss
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Correct Answer: Option C

Explanation:
Alva J. Fisher is credited with inventing the electric-motor-driven 'Thor' washing machine, introduced by the Hurley Machine Company in 1908.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #193
Who discovered the existence of blood capillaries linking arteries to veins, completing Harvey's circulation theory?
A. Robert Hooke
B. Antonie van Leeuwenhoek
C. William Harvey
D. Marcello Malpighi
Discuss
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Correct Answer: Option D

Explanation:
Marcello Malpighi used primitive microscopes to observe capillaries in lung tissues in 1661.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #194
The invention of the common lead pencil using graphite strips encased in wooden cylinders was patented in its modern form by whom?
A. Nicolas-Jacques Conté
B. John Loud
C. Lewis Waterman
D. Walter Hunt
Discuss
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Correct Answer: Option A

Explanation:
Nicolas-Jacques Conté patented the process of mixing powdered graphite with clay and baking it to create modern pencil leads in 1795.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #195
Who discovered the element Potassium via electrolytic extraction shortly after isolating Sodium?
A. Antoine Lavoisier
B. Jöns Jacob Berzelius
C. Humphry Davy
D. Michael Faraday
Discuss
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Correct Answer: Option C

Explanation:
Sir Humphry Davy isolated potassium in 1807 by running current through molten caustic potash ($KOH$).
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #196
The invention of the high-velocity steam engine turbine 'De Laval' type with convergent-divergent nozzles was done by whom?
A. Thomas Newcomen
B. Charles Parsons
C. James Watt
D. Gustaf de Laval
Discuss
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Correct Answer: Option D

Explanation:
Gustaf de Laval developed the specialized nozzle configuration that accelerates steam to supersonic speeds, improving kinetic transfer.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #197
Who discovered that malaria parasites mature within the gastrointestinal tract of Anopheles mosquitoes, winning a Nobel Prize in 1902?
A. Louis Pasteur
B. Sir Ronald Ross
C. Robert Koch
D. Charles Laveran
Discuss
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Correct Answer: Option B

Explanation:
Sir Ronald Ross proved the vector transmission cycle of malaria while working in Secunderabad, India.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #198
Who invented the modern air conditioning system to control indoor temperature and humidity levels in 1902?
A. Willis Carrier
B. James Dewar
C. Nikola Tesla
D. Benjamin Franklin
Discuss
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Correct Answer: Option A

Explanation:
Willis Carrier designed the first mechanical air conditioning apparatus to solve humidity problems inside a printing plant.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #199
The discovery of the cosmic radiation spectrum matching a perfect blackbody source was confirmed by which NASA satellite project?
A. Explorer 1
B. Hubble Space Telescope
C. COBE (Cosmic Background Explorer)
D. Voyager 1
Discuss
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Correct Answer: Option C

Explanation:
The COBE satellite, led by John Mather and George Smoot, measured the CMB radiation perfectly, verifying Big Bang cosmological predictions.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #200
Who invented the liquid-fueled rocket engine, launching the world's first successful prototype in 1926?
A. Wernher von Braun
B. Robert Goddard
C. Hermann Oberth
D. Konstantin Tsiolkovsky
Discuss
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Correct Answer: Option B

Explanation:
Robert H. Goddard launched the first liquid-fueled rocket (using gasoline and liquid oxygen) in Auburn, Massachusetts.
This question belongs to: Static General Knowledge Inventions and Discoveries

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