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Scientists and Inventions covers the contributions of famous scientists and their important discoveries and inventions that shaped modern science and technology. This topic is frequently asked in UPSC, SSC, Railway, Banking, NDA and other competitive examinations. Practice these MCQs with detailed explanations to improve your General Science preparation.
Correct Answer:
(D)
2 3 4 1
The correctly matched list is given below:
John Guttenberg - Printing Press
W.C. Rontgen - X-ray
Michael Faraday - Dynamo Alexander
Graham Bell - Telephone
Ques: 2
Who invented Steam Engine?
Correct Answer:
(B) James Watt
The creation of steam engine began in late 17th century. In 1698, Thomas Savery an English inventor, patented a device that allowed the use of steam to pump water. The steam engine that he created was used to remove water from mines. The design was improved upon by English engineer Thomas Newcomen in 1712. Later, further and more significant improvements to the steam engine were made by Scottish engineer and inventor James Watt in 1763. So due to this reason he is regarded as the inventor of the steam engine.
Ques: 3
Which one of the following pairs is NOT correctly matched?
Correct Answer:
(D)
J. Perkins : Penicillin
Penicillin was discovered by Scottish scientist Alexander Fleming. Rest pairs are correctly matched.
Ques: 4
Match the following in the correct order –
Correct Answer:
(A) Radium - 1. Alexander Fleming
Radium was discovered by Pierre Curie and Madam Curie in 1898. Penicillin was discovered by Alexander-Fleming in 1928. X-Ray was discovered by W.C. Roentgen in 1895 and Edward Jenner discovered the vaccine for measles (Small Pox) in 1796.
Ques: 5
The photoelectric effect was discovered by:
Correct Answer:
(A) Hertz
Photoelectric effect is a phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the emission of electron from a metal plate when light falls on it. This effect was discovered in 1887 by the German Physicist Heinrich Rudolf Hertz. This is also known as Hertz effect.
Ques: 6
The principle of Thermal Ionization is an outstanding contribution of
Correct Answer:
(B) M.N. Saha
The theory of Thermal Ionization of gases was first given by M.N. Saha in a series of papers (1920 a, 1920 b, 1921) and widely applied by him and others to explain the spectrum of the sun and furnish a satisfactory physical theory of stellar spectra and their classification.
Ques: 7
Who is associated with the development of India’s Atomic Bomb:
Correct Answer:
(C) Raja Ramanna
Indian physicist Dr. Raja Ramanna contributed a lot to the development of India's Atomic Bomb. Under his supervision, the first nuclear test (codename 'Smiling Buddha') was carried out in 1974. He also served as director of DRDO and as Scientific Advisor to the Defence Minister of India in 2000.
.
Ques: 8
The National Science Day is observed on February 28 every year to commemorate:
Correct Answer:
(A) Raman-effect day
In 1930, C.V. Raman was the first non-white, Asian and Indian to receive the Nobel Prize in Physics for the work on scattering of light and discovery of Raman Effect. Every year 28th February is celebrated as National Science Day. It is because on the same day in 1928 he discovered 'Raman Effect'