Which of the following statement is correct?

The rest mass of a stable nucleus is equal to the sum of the rest masses of its separated nucleons

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The rest mass of a stable nucleus is greater than the sum of the rest masses of its separated nucleons.

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In nuclear fusion, energy is released by fusing two nuclei of medium mass (approximately 100 a.m.u.)

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In nuclear fission, energy is released by fragmentation of a very heavy nucleus

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Solution

The correct option is D In nuclear fission, energy is released by fragmentation of a very heavy nucleus
In nuclear fission, energy is released by fragmentation of a very heavy nucleus. Nuclear fission is an example of a chain reaction. Each one of the three neutrons produced in the first fission event go on to collide with other U- 235 nuclei. This new collision event will, in turn, produce three additional neutrons; so after two collisions, a total of nine neutrons will be obtained. This increase in neutron inventory (3-9-27-81-243-729-etc.) is similar to the population rise and is yet another example of exponential growth.

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Similar questions

Q. Binding energy of a nucleus is the difference between the sum of the rest mass energies of each of its nucleons and the rest mass energy of the nucleus.

The binding energy of a nucleus is the difference between the sum of the rest mass energies of each of its nucleons and the rest mass energy of the nucleus.

Q. Statement I : Nuclear fission is a spontaneous process i.e. there is no need of external energy supply for this to happen.
Statement II : In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.

Q. Which of the following is a wrong description of binding energy of a nucleus?
(a) It is the energy required to break a nucleus into its constituent nucleons.
(b) It is the energy made available when free nucleons combine to form a nucleus.
(c) It is the sum of the rest mass energies of its nucleons minus the rest mass energy of the nucleus.
(d) It is the sum of the kinetic energy of all the nucleons in the nucleus.

State True or False:

The binding energy of a nucleus is the difference between the sum of the rest mass energies of each of its nucleons and the rest mass energy of the nucleus.

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