A. Lithium
B. Helium
C. Deuterium
D. Hydrogen
A. More than 0.71% of U-235
B. Only fertile material
C. Only fissile material
D. No impurities
A. U-233
B. U-235
C. Pu-239
D. Th-232
A. Pressurised water reactor (PWR)
B. Boiling water reactor (BWR)
C. Candu reactor
D. Molten sodium cooled reactor
A. Natural uranium fuelled heavy water cooled & moderated
B. Highly enriched uranium (85% U-235) fuelled
C. Homogeneous
D. Fast breeder
A. Deuterium
B. Ortho-hydrogen
C. Tritium
D. None of these
A. The disintegration rate of a radioactive substance cannot be increased by heating it
B. Electrons have negligible mass and unit negative change
C. Deuterium atom has one proton and two neutrons in its nucleus
D. Cadmium is capable of absorbing neutrons
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
A. Positron is the antiparticle of electron
B. In α-decay, the ratio of neutron to proton decreases
C. Ionising power of β-rays is higher than that of α-rays
D. Speed of α-rays is more than that of γ-rays