Scientists and Inventors Practice Questions
20 free Scientists and Inventors practice questions for the Static GK. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Who is known as the 'Father of Vaccination' for developing the first successful smallpox vaccine?
- A Louis Pasteur
- B Edward Jenner
- C Alexander Fleming
- D Robert Koch
Correct answer: Edward Jenner
Edward Jenner discovered in 1796 that milkmaids who had caught cowpox were immune to smallpox. He used this observation to create the world's first vaccine, effectively laying the foundation for immunology.
Which scientist is credited with the discovery of Penicillin in 1928?
- A Howard Florey
- B Joseph Lister
- C Ernst Boris Chain
- D Alexander Fleming
Correct answer: Alexander Fleming
Alexander Fleming noticed that a mold called Penicillium notatum had contaminated his petri dishes and was killing the surrounding bacteria. This discovery ushered in the era of antibiotics.
Who invented the first practical incandescent light bulb in 1879?
- A Thomas Edison
- B Nikola Tesla
- C Alexander Graham Bell
- D Benjamin Franklin
Correct answer: Thomas Edison
While many had worked on electric light, Thomas Edison developed a high-vacuum bulb with a carbon filament that could burn for many hours. This made electric lighting commercially viable for homes.
Which scientist developed the Theory of Relativity ($E=mc^2$)?
- A Albert Einstein
- B Isaac Newton
- C Stephen Hawking
- D Niels Bohr
Correct answer: Albert Einstein
Albert Einstein published his Special Theory of Relativity in 1905 and General Relativity in 1915. His work fundamentally changed our understanding of space, time, and gravity.
Who is considered the 'Mother of Modern Physics' and was the first woman to win a Nobel Prize?
- A Marie Curie
- B Vera Rubin
- C Rosalind Franklin
- D Lise Meitner
Correct answer: Marie Curie
Marie Curie discovered the elements Polonium and Radium and coined the term 'radioactivity.' She remains the only person to win Nobel Prizes in two different scientific fields: Physics and Chemistry.
The invention of the telephone is primarily attributed to which inventor?
- A Guglielmo Marconi
- B Samuel Morse
- C Elisha Gray
- D Graham Bell
Correct answer: Graham Bell
Alexander Graham Bell was granted the first US patent for the telephone in 1876. His work in elocution and hearing influenced his desire to transmit sound electronically.
Which scientist formulated the Three Laws of Motion and the Law of Universal Gravitation?
- A Galileo Galilei
- B Johannes Kepler
- C Robert Hooke
- D Isaac Newton
Correct answer: Isaac Newton
Sir Isaac Newton's 'Philosophiae Naturalis Principia Mathematica' is one of the most important works in the history of science. It provided the mathematical framework for classical mechanics.
Who invented the radio and shared the Nobel Prize in Physics in 1909 for contributions to wireless telegraphy?
- A Guglielmo Marconi
- B Jagadish Chandra Bose
- C Heinrich Hertz
- D Michael Faraday
Correct answer: Guglielmo Marconi
Guglielmo Marconi was an Italian inventor who succeeded in sending the first transatlantic radio signal in 1901. His work was pivotal in developing long-distance communication systems.
Which scientist is known as the 'Father of Genetics' for his work on pea plants?
- A Gregor Mendel
- B Charles Darwin
- C James Watson
- D Francis Crick
Correct answer: Gregor Mendel
Gregor Mendel, an Austrian monk, discovered the basic principles of heredity through experiments in his monastery's garden. He identified how traits are passed from parents to offspring via 'factors,' now known as genes.
Who is the inventor of the World Wide Web (WWW)?
- A Tim Berners-Lee
- B Bill Gates
- C Robert Cailliau
- D Vint Cerf
Correct answer: Tim Berners-Lee
Tim Berners-Lee, a British computer scientist at CERN, invented the World Wide Web in 1989. He created the first web browser and the fundamental protocols (HTTP and HTML) that allow the internet to be navigated via links.
Which inventor is famous for the development of the alternating current (AC) electrical system?
- A Thomas Edison
- B Nikola Tesla
- C George Westinghouse
- D James Watt
Correct answer: Nikola Tesla
Nikola Tesla was a Serbian-American inventor who designed the AC motor and transmission system. His system eventually won the 'War of Currents' against Edison's DC system because it was more efficient for long-distance power travel.
Who developed the first successful polio vaccine in 1955?
- A Albert Sabin
- B Jonas Salk
- C Louis Pasteur
- D Paul Offit
Correct answer: Jonas Salk
Jonas Salk developed the inactivated poliovirus vaccine (IPV), which was safe and effective. He famously chose not to patent the vaccine, prioritizing public health over personal profit.
Which scientist is best known for the discovery of the structure of DNA along with James Watson?
- A Francis Crick
- B Richard Feynman
- C Linus Pauling
- D Max Planck
Correct answer: Francis Crick
Francis Crick and James Watson identified the double-helix structure of DNA in 1953. Their work was heavily supported by X-ray diffraction images taken by Rosalind Franklin.
Who invented the barometer, an instrument used to measure atmospheric pressure?
- A Blaise Pascal
- B Evangelista Torricelli
- C Gottfried Wilhelm Leibniz
- D Robert Boyle
Correct answer: Evangelista Torricelli
Evangelista Torricelli, a student of Galileo, invented the mercury barometer in 1643. His invention proved that air has weight and that a vacuum can exist in nature.
Which inventor created the 'Dynamite' and established the Nobel Prizes?
- A Alfred Nobel
- B Henry Bessemer
- C Karl Benz
- D Rudolf Diesel
Correct answer: Alfred Nobel
Alfred Nobel was a Swedish chemist and engineer who held 355 different patents. Distressed by the military use of his invention (dynamite), he bequeathed his fortune to establish the Nobel Prizes in his will.
Who is the 'Father of Microbiology' who discovered the process of pasteurization?
- A Robert Koch
- B Antonie van Leeuwenhoek
- C Louis Pasteur
- D Joseph Lister
Correct answer: Louis Pasteur
Louis Pasteur proved that germs cause disease and developed the process of heating liquids to kill harmful bacteria, now known as pasteurization. He also developed vaccines for rabies and anthrax.
Which scientist is credited with inventing the first mechanical computer, known as the 'Difference Engine'?
- A Alan Turing
- B Charles Babbage
- C John von Neumann
- D Blaise Pascal
Correct answer: Charles Babbage
Charles Babbage is known as the 'Father of the Computer.' While he never fully completed his complex mechanical designs during his lifetime, they provided the logical foundation for modern digital computers.
Who discovered X-rays in 1895 while working with cathode rays?
- A Wilhelm Röntgen
- B Ernest Rutherford
- C Henri Becquerel
- D J.J. Thomson
Correct answer: Wilhelm Röntgen
Wilhelm Röntgen discovered X-rays by accident and took the first X-ray image (of his wife's hand). He was awarded the first-ever Nobel Prize in Physics in 1901.
Which scientist proposed the heliocentric model, stating that the Earth revolves around the Sun?
- A Ptolemy
- B Tycho Brahe
- C Copernicus
- D Aristotle
Correct answer: Copernicus
In 1543, Nicolaus Copernicus published 'De revolutionibus orbium coelestium,' which challenged the long-held geocentric view. This shift in thinking is often called the Copernican Revolution.
Who invented the first steam engine with a separate condenser, greatly improving its efficiency?
- A Thomas Newcomen
- B James Watt
- C Trevithick
- D Robert Fulton
Correct answer: James Watt
James Watt improved upon the earlier Newcomen engine design. His version was much more efficient and powerful, becoming a key driver of the Industrial Revolution.