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 #301
The invention of the highly reflective silver glass surface mirror layout was developed by which chemist?
A. Antoine Lavoisier
B. Robert Bunsen
C. Carl Wilhelm Scheele
D. Justus von Liebig
Discuss
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Correct Answer: Option D

Explanation:
Liebig developed the chemical process of depositing thin metallic silver onto glass panes using chemical reduction reactions in 1835.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #302
Who discovered that the Milky Way is just one of many distinct independent galaxy clusters across space?
A. Galileo Galilei
B. Johannes Kepler
C. Edwin Hubble
D. William Herschel
Discuss
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Correct Answer: Option C

Explanation:
Hubble identified Cepheid variable stars in the Andromeda Nebula, computing its enormous distance outside our own galactic boundaries.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #303
The invention of the common mechanical pencil sharpener layout with internal planetary gears was patented by whom?
A. John Lee Love
B. Walter Hunt
C. Christopher Sholes
D. Nicolas Conté
Discuss
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Correct Answer: Option A

Explanation:
African-American inventor John Lee Love patented the simple, functional portable mechanical sharpener layout ('Love Sharpener') in 1897.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #304
Who discovered that certain living tissue matrices lack internal cell partitions, establishing syncytial structures?
A. Theodor Schwann
B. Matthias Schleiden
C. Robert Hooke
D. Antonie van Leeuwenhoek
Discuss
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Correct Answer: Option A

Explanation:
Schwann expanded cell structural definitions across animal physiology, establishing shared base principles with plant tissues.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #305
The invention of the common synthetic plastic material known as Polyvinyl Chloride (PVC) was optimized by whom?
A. Roy Plunkett
B. Wallace Carothers
C. Waldo Semon
D. Leo Baekeland
Discuss
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Correct Answer: Option C

Explanation:
Waldo Semon added specialized plasticizing agents to brittle PVC material in the 1920s, transforming it into a flexible, highly useful industrial plastic.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #306
Who discovered the primary mathematical law detailing electric current branching paths, known as the junction rule?
A. Gustav Kirchhoff
B. André-Marie Ampère
C. Michael Faraday
D. Georg Ohm
Discuss
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Correct Answer: Option A

Explanation:
Kirchhoff's Junction Rule states that the total current entering any electrical network node precisely matches the total current exiting it.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #307
The invention of the common household incandescent light bulb configuration featuring durable tungsten filaments was patented by whom?
A. Nikola Tesla
B. Thomas Edison
C. Joseph Swan
D. William Coolidge and Irving Langmuir
Discuss
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Correct Answer: Option D

Explanation:
Coolidge developed ductile tungsten wire processing, and Langmuir filled bulbs with inert gas, extending operation life dramatically.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #308
Who discovered that electrical currents alter physical molecular rotation under polarized light fields, establishing the Faraday Effect?
A. James Clerk Maxwell
B. Heinrich Hertz
C. Michael Faraday
D. Hans Christian Ørsted
Discuss
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Correct Answer: Option C

Explanation:
Faraday proved electromagnetism and optical light travel systems interact directly by rotating light polarization planes using magnetic fields in 1845.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #309
The invention of the common mechanical marine escape capsule configuration was engineered by whom?
A. Cornelis Drebbel
B. Robert Fulton
C. John Ericsson
D. Alexander Mitchell
Discuss
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Correct Answer: Option B

Explanation:
Fulton optimized underlying physical buoyancy balances, generating early blueprints for underwater tracking and marine transport apparatus.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #310
Who discovered that the velocity of chemical reaction pathways balances linearly under specific concentration ratios, establishing the Law of Mass Action?
A. Robert Boyle
B. Cato Maximilian Guldberg and Peter Waage
C. Antoine Lavoisier
D. Jöns Jacob Berzelius
Discuss
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Correct Answer: Option B

Explanation:
Norwegian scientists Guldberg and Waage formulated the mathematical chemical equilibrium rate laws in 1864.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #311
The invention of the first functional program-controlled electronic binary computing architecture, the EDSAC, was completed where?
A. University of Pennsylvania
B. Stanford Research Institute
C. University of Cambridge by Maurice Wilkes
D. Harvard University
Discuss
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Correct Answer: Option C

Explanation:
The EDSAC (Electronic Delay Storage Automatic Calculator) performed its first calculation in 1949, applying von Neumann's stored-program architecture.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #312
Who discovered that biological enzymes can perform structural transformations outside of living cell containers, establishing cell-free fermentation?
A. Eduard Buchner
B. Hans Krebs
C. Louis Pasteur
D. Robert Koch
Discuss
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Correct Answer: Option A

Explanation:
Buchner proved yeast extracts ferment sugar into ethanol without living cell structural scaffolding, winning the 1907 Nobel Prize in Chemistry.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #313
The invention of the common chemical transformation layout known as the Solvay process optimized production of what?
A. Sodium Carbonate
B. Sulfuric Acid
C. Ammonia
D. Nitric Acid
Discuss
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Correct Answer: Option A

Explanation:
Ernest Solvay patented the ammoniacal brine method in 1861, replacing the more expensive Leblanc soda ash synthesis.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #314
Who discovered that the planet Uranus possesses a distinct set of narrow equatorial rings?
A. William Herschel
B. Giovanni Cassini
C. Galileo Galilei
D. James L. Elliot, Edward W. Dunham, and Douglas J. Mink
Discuss
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Correct Answer: Option D

Explanation:
The rings of Uranus were discovered in 1977 during airborne stellar occultation observations, when the planet blocked a background star's light.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #315
The invention of the common mechanical cash layout system tracking mechanism was expanded by which major corporation?
A. Xerox
B. NCR (National Cash Register) under John H. Patterson
C. IBM
D. Microsoft
Discuss
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Correct Answer: Option B

Explanation:
NCR purchased Ritty's early patents and scaled mechanical register verification across retail networks globally.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #316
Who discovered that elements display periodic physical attributes when arranged strictly by atomic weight values?
A. Henry Moseley
B. Antoine Lavoisier
C. John Dalton
D. Dmitri Mendeleev and Julius Lothar Meyer
Discuss
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Correct Answer: Option D

Explanation:
Mendeleev and Meyer independently formulated structural periodic tables, but Mendeleev gained fame by accurately predicting undiscovered elements.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #317
The invention of the common mechanical device known as the marine depth tracker Echo Sounder was patented by whom?
A. Guglielmo Marconi
B. Robert Watson-Watt
C. Heinrich Hertz
D. Alexander Behm
Discuss
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Correct Answer: Option D

Explanation:
German physicist Alexander Behm patented the sonic echo sounder depth locator apparatus in 1912 to prevent marine collisions.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #318
Who discovered the biological presence of blood platelets and their exact role in physical blood coagulation?
A. Giulio Bizzozero
B. Karl Landsteiner
C. William Harvey
D. Marcello Malpighi
Discuss
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Correct Answer: Option A

Explanation:
Italian pathologist Bizzozero identified blood platelets ('piastrine') in 1882, describing how they aggregate to plug damaged blood vessels.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #319
The invention of the common synthetic plastic material known as Polyethylene (LDPE) was an accidental discovery by which chemical company?
A. BASF
B. Dow Chemical
C. ICI (Imperial Chemical Industries)
D. DuPont
Discuss
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Correct Answer: Option C

Explanation:
Eric Fawcett and Reginald Gibson accidentally produced white waxy polyethylene solid residue while testing high-pressure ethylene reactions at ICI in 1933.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #320
Who discovered that electric fields can split light spectral lines, a physical phenomenon known as the Stark Effect?
A. Pieter Zeeman
B. Hendrik Lorentz
C. Max Planck
D. Johannes Stark
Discuss
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Correct Answer: Option D

Explanation:
Johannes Stark discovered the electric splitting of hydrogen spectral lines in 1913, winning the 1919 Nobel Prize in Physics.
This question belongs to: Static General Knowledge Inventions and Discoveries

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