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 #341
The invention of the common household safety matchbox strike face mixture containing red phosphorus was patented by whom?
A. Humphry Davy
B. John Walker
C. Pasch Brothers and John Lundström
D. Robert Boyle
Discuss
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Correct Answer: Option C

Explanation:
The Swedish inventors split match chemical triggers, rendering matches safe from accidental friction ignition in pocket storage.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #342
Who discovered that light waves exhibit distinct transverse oscillation directions when passing through tourmaline crystals, establishing Polarization?
A. James Clerk Maxwell
B. Etienne-Louis Malus and Erasmus Bartholin
C. Thomas Young
D. Isaac Newton
Discuss
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Correct Answer: Option B

Explanation:
Bartholin discovered double refraction in Iceland spar, and Malus formalized optical polarization laws by reflection properties.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #343
The invention of the common mechanical office device known as the copy mimeograph machine was patented by whom?
A. Chester Carlson
B. John Loud
C. Christopher Sholes
D. Thomas Edison
Discuss
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Correct Answer: Option D

Explanation:
Edison patented the stencil duplicating device in 1876, which Albert Dick later refined into the widespread commercial mimeograph.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #344
Who discovered that the chemical element Titanium is isolated from dark mineral iron sand matrices?
A. William Gregor
B. Antoine Lavoisier
C. Jöns Jacob Berzelius
D. Martin Heinrich Klaproth
Discuss
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Correct Answer: Option A

Explanation:
English clergyman William Gregor discovered titanium in ilmenite mineral sands in 1791, naming it 'menaccanite'.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #345
The invention of the highly flexible modern structural material known as Synthetic Rubber (Buna) was developed where?
A. Germany by IG Farben laboratories
B. England
C. United States
D. Russia
Discuss
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Correct Answer: Option A

Explanation:
German chemists synthesized sodium-catalyzed butadiene copolymers (Buna-S and Buna-N) to secure alternative industrial resources.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #346
Who discovered the primary biological pattern detailing that DNA nucleotide bases match in specific pairs ($A=T, G=C$)?
A. Rosalind Franklin
B. Erwin Chargaff
C. James Watson
D. Francis Crick
Discuss
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Correct Answer: Option B

Explanation:
Chargaff's Rules established the 1:1 stoichiometric ratios of purines to pyrimidines, providing a key clue for Watson and Crick's model.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #347
The invention of the common mechanical transport mechanism known as the bicycle chain drive system was optimized by whom?
A. Wright Brothers
B. Henry Ford
C. Harry John Lawson and John Kemp Starley
D. Karl Benz
Discuss
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Correct Answer: Option C

Explanation:
Starley engineered the 'Rover Safety Bicycle' in 1885, featuring equal-sized wheels and rear-wheel chain driving mechanisms.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #348
Who discovered that atomic structural properties are governed by specific continuous wave function coordinates, formulating Wave Mechanics?
A. Werner Heisenberg
B. Niels Bohr
C. Erwin Schrödinger
D. Max Born
Discuss
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Correct Answer: Option C

Explanation:
Erwin Schrödinger formulated the Schrödinger Equation in 1925, introducing wave function dynamics to quantum models.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #349
The invention of the common household refrigeration fluid known as Freon (CFC) was developed by which chemist?
A. Thomas Midgley Jr.
B. Leo Baekeland
C. Wallace Carothers
D. Roy Plunkett
Discuss
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Correct Answer: Option A

Explanation:
Midgley synthesized dichlorodifluoromethane at General Motors in 1928, creating non-toxic, non-flammable cooling gases that later had severe environmental impacts.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #350
Who discovered that solar light presentation presents distinct missing dark absorptive band lines, establishing the Fraunhofer Lines?
A. Joseph von Fraunhofer and William Hyde Wollaston
B. Gustav Kirchhoff
C. Isaac Newton
D. Robert Bunsen
Discuss
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Correct Answer: Option A

Explanation:
Wollaston observed early dark bands, and Fraunhofer mapped over 570 lines precisely using customized optical spectroscopes in 1814.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #351
The invention of the common computing structural code system known as the ASCII format was directed by whom?
A. Bill Gates
B. Bob Bemer and the ASA committee
C. Alan Turing
D. Dennis Ritchie
Discuss
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Correct Answer: Option B

Explanation:
Bemer led the standardization of the American Standard Code for Information Interchange in 1963, unifying electronic alpha-numeric notation.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #352
Who discovered that the planet Saturn possesses a wide gap inside its ring bands, known as the Cassini Division?
A. Christiaan Huygens
B. Giovanni Domenico Cassini
C. William Herschel
D. Galileo Galilei
Discuss
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Correct Answer: Option B

Explanation:
Cassini discovered the distinct gap separating Saturn's A and B rings in 1675 from the Paris Observatory.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #353
The invention of the common industrial mining device known as the safety fuse for blasting dynamite was developed by whom?
A. Alfred Nobel
B. Humphry Davy
C. William Bickford
D. George Stephenson
Discuss
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Correct Answer: Option C

Explanation:
Bickford patented the tar-insulated gunpowder core safety cord fuse in 1831, preventing premature mine ignition disasters.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #354
Who discovered that electrical currents pass through vacuum cavities via discrete streams named 'Cathode Rays'?
A. Wilhelm Röntgen
B. Michael Faraday
C. William Crookes and Julius Plücker
D. J.J. Thomson
Discuss
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Correct Answer: Option C

Explanation:
Plücker observed early glow phenomena, and Crookes engineered highly evacuated discharge tubes to isolate ray behaviors.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #355
The invention of the common mechanical office typewriter correction fluid ('Liquid Paper') was developed by which female innovator?
A. Grace Hopper
B. Josephine Cochrane
C. Bette Nesmith Graham
D. Mary Anderson
Discuss
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Correct Answer: Option C

Explanation:
Graham mixed white tempera paint in a blender in the 1950s to fix her typing errors, later scaling the multi-million-dollar Liquid Paper company.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #356
Who discovered that the chemical element Chromium is isolated from Siberian red lead ore matrices?
A. Louis-Nicolas Vauquelin
B. Antoine Lavoisier
C. Carl Wilhelm Scheele
D. Martin Heinrich Klaproth
Discuss
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Correct Answer: Option A

Explanation:
Vauquelin isolated chromium in 1797 by treating crocoite mineral crystals with hydrochloric acid compounds.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #357
The invention of the common electronic memory system known as Dynamic Random-Access Memory (DRAM) was patented by whom?
A. Robert Noyce
B. Robert H. Dennard
C. Jack Kilby
D. Fujio Masuoka
Discuss
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Correct Answer: Option B

Explanation:
Dennard patented the single-transistor, single-capacitor memory cell layout at IBM in 1968, allowing exceptionally high-density memory storage.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #358
Who discovered that biological chromosomes carry the unique hereditary factor tracking layouts, establishing Chromosome Theory?
A. James Watson
B. Thomas Hunt Morgan
C. Gregor Mendel
D. Walter Sutton and Theodor Boveri
Discuss
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Correct Answer: Option D

Explanation:
Sutton and Boveri independently identified in 1902 that chromosome pairing and separation match Mendelian inheritance laws.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #359
The invention of the common kitchen appliance known as the electric food disposal system was developed by whom?
A. John W. Hammes
B. Willis Carrier
C. Alva Fisher
D. Thomas Edison
Discuss
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Correct Answer: Option A

Explanation:
Architect John W. Hammes invented the sink garbage disposer device ('InSinkErator') in 1927 to help his wife clean up food waste.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #360
Who discovered that light waves traveling through tiny structural apertures display edge-bending profiles, establishing Diffraction?
A. Francesco Maria Grimaldi
B. Isaac Newton
C. Thomas Young
D. Christiaan Huygens
Discuss
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Correct Answer: Option A

Explanation:
Italian physicist Grimaldi coined the exact term 'diffraction' and accurately recorded the phenomenon in a posthumous 1665 publication.
This question belongs to: Static General Knowledge Inventions and Discoveries

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