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Chapter 21 - Nuclear Physics - 3
1.
Nuclei having same charge number but different mass number is called:
a) Isotopes
b) Similar Proton
c) Isobars
d) Similar Electron
2.
Isotopes of the uranium are:
a) U
235
U
236
U
238
b)
92
U
234
92
U
235
92
U
238
c)
235
U
239
U
d) None of them
3.
The isotope ¢
1
H
1
contain
a) One neutron
b) No neutron
c) Two neutrons
d) Three neutrons
4.
The binding energy can be calculated by:
a) Mc
2
b) 1/2 mc
2
c) mgh
d) Fs
5.
The phenomenon of natural radioactivity was discovered by:
a) Rutherford
b) Henry Bccquerel
c) Madam Curie
d) Sir Chadwick
6.
Disintegration of nucleus obeys the laws of conservation of:
a) Both charge and mass
b) Mass only
c) None of above
d) Charge only
7.
The natural emission of
a
b
g
radiation from a certain element is called
a) Black body radiation
b) Temperation radiation
c) Heat radiation
d) Radioactivity
8.
Radioactivity happen due to the disintegration of:
a) Protons
b) Mass
c) Electrons
d) Nucleus
9.
If a nucleus emits an
b
-particle along with a neutrons its mass number remains constant but charge decreases by
a) 3
b) +-1
c) + -2
d) 4
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