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.Management Sciences
Category: Nuclear Power Engineering
The ratio of atomic radius to its nuclear radius is about___________________?
A. 105
B. 108
C. 1012
D. 1015
Which of the following is not an ore of uranium ?
A. Pitchblende
B. Kyanite
C. Carnotite
D. Rescolite
Pick out the correct statement?
A. Loss of electrons from neutral atoms produces negative ions
B. The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectively
C. Gain of electrons by neutral atoms form cations
D. Proton to neutron ratio in a stable nucleus is 2 : 1
The atomic mass of an element is fractional, because ______________________?
A. Of uncertainty principle
B. It may have isobars
C. It contains neutrons
D. It may have isotopes
Plutonium________________?
A. Is recovered from spent fuel from thermal nuclear reactor
B. Has much lower melting point (640°C ) compared to thorium (1690°C)
C. Both A. and B.
D. Neither A. nor B.
Sodium melts (at atmospheric pressure) at a temperature of ____________ °C?
A. 58
B. 98
C. 348
D. 588
Pick out the wrong statement?
A. The nucleus of a hydrogen atom is identical with a proton
B. A, β-ray particle is identical with an electron
C. Mass of an electron is about 1/1800th of the lightest nucleus
D. Positron is heavier than a proton
Isotopes of an element have different_____________________?
A. Mass number
B. Electronic configuration
C. Nuclear charge
D. Chemical properties
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