61. Who among the following laid the foundation of nuclear science in the country? [RRB 1994]
(a) Vikram Sarabhai
(b) Homi J. Bhabha
(c) M. G. K. Menon
(d) Raja Ramanna
Ans : (b)
62. Match the following: [CDS 2002]
Scientist Contribution
A. S. N. Bose 1. Theory of numbers
B. S. Chandrasekhar 2. Elementary particles
statistics
C. S. Ramanujam 3. Astronomy
D. Aryabhatta 4. Theory of black hole
A B C D
(a) 2 1 4 3
(b) 4 3 2 1
(c) 2 4 1 3
(d) 3 1 4 2
Ans : (c)
63. Match the following: [CDS 2001]
Discovery Scientist
A. Radioactivity 1. Issac Newton
B. Relativity 2. Roentgen
C. Gravitation 3. Henry Bacquerel
D. X-rays 4. Albert Einstein
A B C D
(a) 3 1 2 4
(b) 3 4 1 2
(c) 1 3 4 2
(d) 2 4 1 3
Ans : (b)
64. Match the following:
A. X-rays 1. de-Broglie
B. Wave particle 2. Roentgen
C. Fission 3. Hann and
Straussman
D. Chain reaction 4. Fermi
A B C D
(a) 2 1 4 3
(b) 4 3 2 1
(c) 1 3 2 4
(d) 3 2 1 4
Ans : (a)
65. A silver spoon and a book are both at room temperature. The spoon feels colder to the" touch because:
(a) of an illusory effect
(b) silver is an almost pure material
(c) silver is a very good heat conductor
211