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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Page 14 of 21
Question #261
The invention of the first practical steam engine locomotive deployed on standard industrial rail layouts was done by whom?
A. George Stephenson
B. Richard Trevithick
C. James Watt
D. Thomas Newcomen
Discuss
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Correct Answer: Option B

Explanation:
Trevithick designed the first functional railway steam locomotive in 1804 for the Penydarren ironworks track.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #262
Who discovered that structural chemical atoms are arranged in strict configurations characterized by coordination numbers, founding inorganic stereochemistry?
A. Dmitri Mendeleev
B. Gilbert Lewis
C. Alfred Werner
D. Linus Pauling
Discuss
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Correct Answer: Option C

Explanation:
Alfred Werner proposed the coordination theory of complex inorganic compounds, winning the 1913 Nobel Prize in Chemistry.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #263
The invention of the common computing programming language Fortran (Formula Translation) was directed by whom at IBM?
A. Dennis Ritchie
B. Grace Hopper
C. John Backus
D. Alan Turing
Discuss
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Correct Answer: Option C

Explanation:
John Backus led the engineering team that developed Fortran in 1957, the first widely used high-level compiled computer language.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #264
Who discovered the presence of cosmic background radiation anisotropy using data from the WMAP satellite instrument?
A. Arno Penzias
B. Charles L. Bennett and the NASA team
C. Edwin Hubble
D. Robert Wilson
Discuss
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Correct Answer: Option B

Explanation:
The Wilkinson Microwave Anisotropy Probe mapped localized density variations in primordial background energy structures with high precision.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #265
The invention of the standard mechanical typewriter carbon paper mechanism to replicate text was patented by whom?
A. John Loud
B. Pellegrino Turri
C. Walter Hunt
D. Christopher Sholes
Discuss
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Correct Answer: Option B

Explanation:
Pellegrino Turri developed early carbon pigment transfer papers in 1806 to functionalize his experimental typing machines.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #266
Who discovered that the chemical element Iodine is isolated from seaweed ash matrices?
A. Humphry Davy
B. Bernard Courtois
C. Joseph Louis Gay-Lussac
D. Antoine Lavoisier
Discuss
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Correct Answer: Option B

Explanation:
Bernard Courtois isolated violet iodine vapors accidentally in 1811 while adding excess sulfuric acid to seaweed extract solutions.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #267
The invention of the common mechanical lock system known as the pin-tumbler cylinder configuration was patented by whom?
A. Linus Yale Sr. and Linus Yale Jr.
B. Robert Blake
C. Walter Hunt
D. Elisha Otis
Discuss
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Correct Answer: Option A

Explanation:
The Yales developed the cylinder design based on ancient Egyptian wooden locks, which remains common globally.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #268
Who discovered the biological mechanism of continuous cell culturing, establishing the immortal 'HeLa cell line' in 1951?
A. Robert Koch
B. Alexander Fleming
C. Jonas Salk
D. George Otto Gey
Discuss
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Correct Answer: Option D

Explanation:
George Gey isolated and successfully cultivated cervical cancer tissue cells from Henrietta Lacks without them dying out in laboratory vessels.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #269
The invention of the common chemical element identification device known as the spectroscope was co-developed by whom?
A. Humphry Davy
B. Dmitri Mendeleev
C. Antoine Lavoisier
D. Robert Bunsen and Gustav Kirchhoff
Discuss
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Correct Answer: Option D

Explanation:
Bunsen and Kirchhoff integrated clean flame burners with light-splitting prisms to discover cesium and rubidium through emission lines.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #270
Who discovered that light travels in packets of discrete energy called photons, explaining the Photoelectric Effect?
A. Max Planck
B. Louis de Broglie
C. Niels Bohr
D. Albert Einstein
Discuss
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Correct Answer: Option D

Explanation:
Albert Einstein won the 1921 Nobel Prize in Physics for his 1905 paper applying quantum concepts to the photoelectric effect.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #271
The invention of the common mechanical elevator safety brake system was publicly demonstrated at the World's Fair by whom?
A. Henry Bessemer
B. Elisha Otis
C. Thomas Edison
D. James Watt
Discuss
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Correct Answer: Option B

Explanation:
Otis dramatic demonstration in 1854 involved cutting the platform support rope while standing on it, proving the safety gear worked.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #272
Who discovered the presence of the complex radioactive element Plutonium in 1940?
A. Otto Hahn
B. Enrico Fermi
C. Lise Meitner
D. Glenn T. Seaborg and his team
Discuss
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Correct Answer: Option D

Explanation:
Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl isolated plutonium-238 via deuteron bombardment of uranium.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #273
The invention of the common electronic operating layout known as the Graphical User Interface (GUI) was pioneered by which lab?
A. Xerox PARC
B. Apple Computers
C. Microsoft
D. IBM Research
Discuss
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Correct Answer: Option A

Explanation:
Xerox Palo Alto Research Center (PARC) engineered the Alto computer featuring mouse-driven windows, menus, and file icons.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #274
Who discovered the specific mathematical formula detailing gas density variation relative to molecular weight, known as the diffusion law?
A. John Dalton
B. Robert Boyle
C. Thomas Graham
D. Amadeo Avogadro
Discuss
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Correct Answer: Option C

Explanation:
Graham's Law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of its molecular mass.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #275
The invention of the modern mechanical cotton picking machine was developed by which brother team?
A. Wright Brothers
B. Montgolfier Brothers
C. Siemens Brothers
D. John and Mack Rust
Discuss
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Correct Answer: Option D

Explanation:
The Rust brothers patented the automated spindle mechanical cotton harvester in the 1930s, mechanizing Southern agriculture.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #276
Who discovered that the element Uranium emits invisible energy streams, opening the radioactive field before Marie Curie?
A. Ernest Rutherford
B. Henri Becquerel
C. J.J. Thomson
D. Wilhelm Röntgen
Discuss
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Correct Answer: Option B

Explanation:
Becquerel left uranium compounds in a dark desk drawer with unexposed photographic plates, discovering they fogged without light exposure.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #277
The invention of the first functional high-vacuum electron tube amplifier, the Audion triode, was made by whom?
A. John Ambrose Fleming
B. Lee de Forest
C. Thomas Edison
D. Nikola Tesla
Discuss
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Correct Answer: Option B

Explanation:
Lee de Forest added a grid control wire element to Fleming's diode in 1906, creating the first signal amplification tube.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #278
Who discovered the precise genetic structure layout known as the operon model in bacterial gene regulation?
A. Gregor Mendel
B. Barbara McClintock
C. James Watson and Francis Crick
D. François Jacob and Jacques Monod
Discuss
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Correct Answer: Option D

Explanation:
Jacob and Monod mapped the lac operon in E. coli, proving how cells inhibit or promote enzyme production based on nutrient environments.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #279
The invention of the common electronic storage method known as the floppy disk was developed by which company?
A. Xerox
B. Apple
C. IBM engineering team led by Alan Shugart
D. Sony
Discuss
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Correct Answer: Option C

Explanation:
IBM introduced the 8-inch magnetic coated flexible disk system in 1971 to load microcode patches into mainframes.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #280
Who discovered that absolute thermodynamic entropy reaches zero for pure crystalline elements at absolute zero temperature?
A. Walther Nernst
B. Max Planck
C. Lord Kelvin
D. James Joule
Discuss
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Correct Answer: Option A

Explanation:
Walther Nernst formulated the Third Law of Thermodynamics, which earned him the 1920 Nobel Prize in Chemistry.
This question belongs to: Static General Knowledge Inventions and Discoveries

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