Modern Scientists — Set 4
Inventions · आधुनिक वैज्ञानिक · Questions 31–40 of 60
Who is known as the 'Father of Indian Chemistry' and founded Bengal Chemicals & Pharmaceuticals?
Correct Answer: D. Prafulla Chandra Ray
The correct answer is 'Prafulla Chandra Ray'. P.C. Ray was a chemist and educator who discovered mercurous nitrite in 1896. He was a nationalist who aimed to use science for industrial self-reliance in India. His book 'A History of Hindu Chemistry' is a classic in the field.
Which Indian scientist developed the 'Hoyle-Narlikar Theory' of gravity as an alternative to General Relativity?
Correct Answer: B. Jayant Narlikar
Jayant Narlikar is an astrophysicist who collaborated with Fred Hoyle on the conformal gravity theory. He is also a well-known science communicator and author of many science fiction stories in Marathi. He founded the Inter-University Centre for Astronomy and Astrophysics (IUCAA).
Which Indian-American computer scientist is the lead inventor of the USB (Universal Serial Bus) standard?
Correct Answer: B. Ajay Bhatt
Ajay Bhatt led the team at Intel that developed the USB technology, which simplified the connection between computers and peripheral devices. He holds more than 130 patents in various fields of computer architecture. USB has become the global standard for device connectivity.
Who is the primary person responsible for the 'Pokhran-II' nuclear tests in 1998 along with A.P.J. Abdul Kalam?
Correct Answer: C. R. Chidambaram
R. Chidambaram was the Chairman of the Atomic Energy Commission during the 'Operation Shakti' tests. He is a prominent physicist known for his research in neutron crystallography. He later served as the Principal Scientific Adviser to the Government of India.
Who is the first Indian scientist to win the Nobel Prize in Physics for his work on the scattering of light?
Correct Answer: D. C.V. Raman
Sir Chandrasekhara Venkata Raman discovered that light changes its frequency when it passes through a transparent material. This discovery is vital for Raman spectroscopy used in chemistry and medicine. He was the first Asian to win a Nobel Prize in any of the sciences.
Which Indian scientist is known as the 'Father of Indian Surgery' in modern medical history (inspired by ancient Sushruta)?
Correct Answer: A. B.C. Roy
Dr. Bidhan Chandra Roy was a legendary physician and the second Chief Minister of West Bengal. He played a major role in the establishment of medical institutions like Jadavpur T.B. Hospital and Chittaranjan Seva Sadan. National Doctors' Day is celebrated on his birth and death anniversary, July 1.
Which Indian scientist discovered the process of 'Thermal Ionization' while studying solar spectra?
Correct Answer: C. Meghnad Saha
The Saha ionization equation is a fundamental result in stellar astrophysics. It allows scientists to relate the spectral classes of stars to their actual temperatures. This work provided a breakthrough in our understanding of the physical state of matter in the stars.
Who is known as the 'Metro Man of India' for his work on the Delhi Metro?
Correct Answer: C. E. Sreedharan
Elattuvalapil Sreedharan is a retired civil engineer known for completing large-scale infrastructure projects ahead of schedule. He also led the construction of the Konkan Railway, one of the most challenging engineering feats in India. He was awarded the Padma Vibhushan in 2008.
Which Indian scientist is famous for his research on 'Liquid Crystals' and served as the Director of RRI?
Correct Answer: C. S. Chandrasekhar (Physicist)
Sivaramakrishna Chandrasekhar (not the astrophysicist) was a renowned physicist known for his work on liquid crystals and the development of the discotic liquid crystal. He founded the Centre for Liquid Crystal Research in Bangalore. He was a nephew of C.V. Raman.
Who is the lead scientist behind India's 'Chandrayaan-1' mission as the Chairman of ISRO?
Correct Answer: D. G. Madhavan Nair
Under G. Madhavan Nair's chairmanship, ISRO successfully launched the first mission to the Moon in 2008. This mission discovered the presence of water molecules on the lunar surface. He was awarded the Padma Vibhushan in 2009 for his contribution to space technology.