In a nuclear fission reaction 
(a) Two light nuclei combine to produce a heavier nucleus
(b) A light nucleus bombarded by thermal neutrons breaks up
(c) A heavy nucleus bombarded by thermal neutrons breaks up
(d) A heavy nucleus breaks up by itself

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Hydrogen bomb is based on which of the following phenomenon
(a) Nuclear fission             (b) Nuclear fusion
(c) Radioactive decay        (d) None of these

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The number of neutrons released when U23592 undergoes fission by absorbing n01 and Ba56144+Kr3689are formed, is 
(a) 0           (b) 1
(c) 2           (d) 3

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Which of the following particle has similar mass to electron

(a) Proton              (b) Neutron
(c) Positron            (d) Neutrino

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Neutrino is a particle, which is 
(a) Charged and has spin
(b) Charged and has no spin
(c) Charge less and has spin
(d) Charge less and has no spin

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To generate a power of 3.2 mega watt, the number of fissions of U235 per minute is
(Energy released per fission = 200MeV, 1eV=1.6×10-19 J 

(a) 6×1018         (b) 6×1017
(c) 1017              (d) 6×1016

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The average number of prompt neutrons produced per fission of U235 is 
(a) More than 5          (b) 3 to 5
(c) 2 to 3                   (d) 1 to 2

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In the nuclear reaction: Xn, α 3Li7 the term X will be 3

(a) B510            (b) B59
(c) B511            (d) He24

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Types of decay
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In an atomic bomb, the energy is released due to

(a) Chain reaction of neutrons and U92235
(b) Chain reaction of neutrons and U92288
(c) Chain reaction of neutrons and P92240
(d) Chain reaction of neutrons and U92286

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If an electron and a positron annihiliate, then the energy released is 
(a) 3.2×10-13 J        (b) 1.6×10-13 J
(c) 4.8×10-13 J           (d)  6.4×10-13 J

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