The life of a meson is about
A.10-18 sec
B.10-2 sec
C.10-18 sec
D.1 sec
Category: Nuclear Engineering Mcqs
In nuclear reactions
A.only the mass number is conserved
B.only the atomic number is conserved
C.the mass number and the atomic number both are conserved
D.neither the atomic number nor the mass number is conserved
Which of the following statements is wrong for deuterium and tritium?
A.Both have same number of protons
B.Both have same number of electrons
C.Both have same number of neutrons
D.Both form neutral exides
The ratio of the mass of an electron to the mass of a proton is
A.1837
B.1/1837
C.183.7
D.1/183.7
An atom can be considered as having a dense nucleus of neutrons and protons and a surrounding distribution of electrons. If there are x neutrons y protons and z electrons what sort of relationship exists between x y and z in a small neutral atom? Where ? means approximately equals.
A.x = y ? z
B.x ? y = z
C.x = y = z
D.x = y-1 = z
Nuclear fission was first experimentally observed by
A.Fermi
B.Rutherford
C.Planck
D.Hahn and strassman
The radius of nucleus is of the order of
A.10-10 cm
B.10-8 cm
C.10-14 cm
D.10-12 cm
Deuterium differs from hydrogen in
A.chemical properties
B.physical properties
C.both physical and chemical properties
D.radioactive properties
Which of the following particles is unstable?
A.neutrons
B.proton
C.electron
D.alpha particle
The atom whose nucleus contains the largest number of neutrons is
A.92U235
B.92U238
C.92U239
D.94Pu239
