Nuclei  MCQs

MCQs of Nuclei

Showing 91 to 100 out of 138 Questions
7 8 9 10 11 12
91.
Which of the following is similar in isotone ?
(a) Number of proton
(b) Number of neutrons
(c) Mass number
(d) Electrons
Answer:

Option (c)

92.
Nuclear density is of the order of _____ .
(a) 103 kg m-3
(b) 1012 kg m-3
(c) 1017 kg m-3
(d) 1024 kg m-3
Answer:

Option (c)

93.
Which type of forces are present in nucleus which binds the nucleon in nucleus ?
(a) Electromagnetic forces
(b) Gravitational forces
(c) Quarks-quarks forces
(d) Weak force
Answer:

Option (c)

94.
The average density of nucleus is _____ times the density of water.
(a) 2 × 1017
(b) 2 × 1014
(c) 2 × 10-14
(d) 2 × 10-17
Answer:

Option (b)

95.
If the radius of nucleus is _____ then the atomic radius is equal to the radius (6.4 × 103 km) of the earth.
(a) 32 m
(b) 6.4 m
(c) 64 m
(d) 64 km
Answer:

Option (c)

96.
If the radius of nucleus is 3.3 fm, then the atomic mass number of its atom is _____ unit.
(a) zero
(b) 1
(c) 1.1
(d) 27
Answer:

Option (d)

97.
If the radius of a nucleus of mass number 27 is about 3 × 10-15 m then the radius of nucleus with atomic mass number 128 is _____ m.
(a) 1.5 × 10-15
(b) 3.0 × 10-15
(c) 4.5 × 10-15
(d) 5.0 × 10-15
Answer:

Option (d)

98.
The energy released when one electron and one positron combined =_____ .
(a) 1.6 × 10-13 J
(b) 3.2 × 10-13 J
(c) 4.8 × 10-13 J
(d) 6.4 × 10-13 J
Answer:

Option (a)

99.
Suppose the neutron is decayed by the following reaction n → p + e- . Find the change in mass during reaction. Here mass of neutron mn = 1.00867 u, mass of proton mp = 1.00728 u, mass of electron me = 5.48578 × 10-4 u
(a) 0.853u
(b) 8.53u
(c) 853u
(d) 8.53 × 10-4
Answer:

Option (d)

100.
The binding energy of a nucleus per nucleon is E. Then the energy needed to liberate the first nucleon from a nucleus is _____ . (where A = mass number)
(a) less than E
(b) greater than E
(c) equal to E
(d) EA
Answer:

Option (b)

Showing 91 to 100 out of 138 Questions
7 8 9 10 11 12