Modern Scientists — Set 4

Correct Answer: D. Prafulla Chandra Ray

• **Prafulla Chandra Ray** = He is revered as the 'Father of Indian Chemistry' and established Bengal Chemicals & Pharmaceuticals. • **1896** — Ray discovered mercurous nitrite, showcasing his pioneering work in chemistry. • 💡 Wrong-option analysis: [S.S. Joshi]: Not recognized as the 'Father of Indian Chemistry'; [T.R. Seshadri]: Known for his work in organic chemistry, not the founder of Bengal Chemicals; [Shanti Swarup Bhatnagar]: Famous for founding CSIR and the Bhatnagar Awards, not the 'Father of Indian Chemistry'.

Correct Answer: B. Jayant Narlikar

• **Jayant Narlikar** = He is an astrophysicist who, in collaboration with Fred Hoyle, developed the 'Hoyle-Narlikar Theory' of gravity. • **Inter-University Centre for Astronomy and Astrophysics (IUCAA)** — Narlikar founded this center, making significant contributions to astronomy research in India. • 💡 Wrong-option analysis: [E.C.G. Sudarshan]: Known for his work in quantum optics and theoretical physics, not the Hoyle-Narlikar theory; [Meghnad Saha]: Famous for the Saha ionization equation; [Abhay Ashtekar]: Known for his work in loop quantum gravity, not the Hoyle-Narlikar theory.

Correct Answer: B. Ajay Bhatt

• **Ajay Bhatt** = He is the Indian-American computer scientist recognized as the lead inventor of the USB (Universal Serial Bus) standard. • **130 patents** — Bhatt holds more than this number of patents in various fields of computer architecture, highlighting his extensive contributions. • 💡 Wrong-option analysis: [Narinder Singh Kapany]: Known as the 'Father of Fiber Optics'; [Vinod Khosla]: A co-founder of Sun Microsystems, known for venture capitalism; [Sabeer Bhatia]: Co-founder of Hotmail, an early free webmail service.

Correct Answer: C. R. Chidambaram

• **R. Chidambaram** = He was the Chairman of the Atomic Energy Commission and played a primary role in the 'Pokhran-II' nuclear tests. • **1998** — The 'Pokhran-II' nuclear tests, also known as 'Operation Shakti', were conducted in this year, marking a significant milestone for India. • 💡 Wrong-option analysis: [Raja Ramanna]: A key figure in Pokhran-I (1974), not Pokhran-II; [Anil Kakodkar]: Served as Chairman of the Atomic Energy Commission later, but not during Pokhran-II; [Homi Sethna]: Key figure in Pokhran-I, served as chairman of AEC prior to Pokhran-II.

Correct Answer: D. C.V. Raman

• **C.V. Raman** = He was the first Indian scientist to win the Nobel Prize in Physics for his groundbreaking work on the scattering of light, known as the 'Raman Effect'. • **Raman Effect** — This discovery, where light changes its frequency upon passing through a transparent medium, is fundamental to spectroscopy and chemical analysis. • 💡 Wrong-option analysis: [Vikram Sarabhai]: Known as the 'Father of the Indian Space Program'; [Homi Bhabha]: Known as the 'Father of the Indian Nuclear Program'; [S.N. Bose]: Known for Bose-Einstein statistics, but did not win a Nobel Prize for it.

Correct Answer: A. B.C. Roy

• **B.C. Roy** = He is widely regarded as the 'Father of Indian Surgery' in modern medical history and was also the second Chief Minister of West Bengal. • **July 1** — This date marks National Doctors' Day in India, celebrated on the birth and death anniversary of Dr. Bidhan Chandra Roy. • 💡 Wrong-option analysis: [V.S. Ramachandran]: A neuroscientist known for his work in behavioral neurology; [D.K. Kar]: Not widely known as 'Father of Indian Surgery'; [A.S. Paintal]: A physiologist known for his work on respiratory and cardiovascular reflexes.

Correct Answer: C. Meghnad Saha

• **Meghnad Saha** = He is renowned for discovering the process of 'Thermal Ionization' and formulating the Saha ionization equation while studying solar spectra. • **Saha ionization equation** — This fundamental equation is crucial in astrophysics, allowing scientists to determine the physical conditions of stars from their spectra. • 💡 Wrong-option analysis: [S.N. Bose]: Known for Bose-Einstein statistics, not thermal ionization; [C.V. Raman]: Discovered the Raman Effect related to light scattering; [Homi Bhabha]: Known as the 'Father of the Indian Nuclear Program'.

Correct Answer: C. E. Sreedharan

• **E. Sreedharan** = He is famously known as the 'Metro Man of India' for his instrumental role in developing the Delhi Metro and other major infrastructure projects. • **2008** — Sreedharan was honored with the Padma Vibhushan, India's second-highest civilian award, for his exceptional contributions to engineering and public service. • 💡 Wrong-option analysis: [Nandan Nilekani]: Co-founder of Infosys, known for Aadhaar project; [M. Visvesvaraya]: A renowned engineer and statesman, known for his contributions to dam building and industrialization, but not the Metro Man; [Ratan Tata]: Industrialist and former chairman of Tata Group.

Correct Answer: C. S. Chandrasekhar (Physicist)

• **S. Chandrasekhar (Physicist)** = Sivaramakrishna Chandrasekhar is renowned for his pioneering research on 'Liquid Crystals' and for establishing the Centre for Liquid Crystal Research. • **Discotic liquid crystal** — Chandrasekhar's significant contribution included the discovery and development of this new class of liquid crystals. • 💡 Wrong-option analysis: [K.S. Krishnan]: Collaborated with C.V. Raman on the Raman Effect; [G.S. Agarwal]: Known for his work in quantum optics, not liquid crystals; [C.V. Raman]: Famous for the Raman Effect, not specifically liquid crystals research.

Correct Answer: D. G. Madhavan Nair

• **G. Madhavan Nair** = He was the Chairman of ISRO and the lead scientist behind India's historic 'Chandrayaan-1' mission. • **2008** — The 'Chandrayaan-1' mission, launched in this year, famously discovered the presence of water molecules on the lunar surface. • 💡 Wrong-option analysis: [A.P.J. Abdul Kalam]: Former President of India and instrumental in missile technology, but not ISRO Chairman during Chandrayaan-1; [Satish Dhawan]: Former ISRO Chairman, significantly contributed to the space program's early growth; [K. Kasturirangan]: Former ISRO Chairman, led missions before Chandrayaan-1.