Question

The fusion process is possible at high temperature because at high temperatures
(A) The nucleus disintegrates
(B) Molecules disintegrate
(C) Atoms become ionized
(D) The nuclei get sufficient energy so as to overcome the repulsive Coulomb force

Answer 1

Hint: In this question, we need to comment on why the fusion process is possible at high temperatures. For this, we will follow the details of the fusion process and the condition under which it can happen.

Complete step by step answer:
Nuclear fusion is the fusion of two lighter positive charged particles. Since these nuclei are positive charge, hence these nuclei will experience a high electrostatic force of repulsion since both the nuclei are having the same charge.

Hence to overcome this high electrostatic force of repulsion, these nuclei are given a very high temperature, since the high temperature in the nuclei produces a high amount of the kinetic energy. This energy attracts the two nuclei, and these two nuclei join together to form new nuclei is formed.Hence we can say fusion takes place at high temperature as nuclei get sufficient energy so as to overcome the repulsive Coulomb force.
Hence,option D is correct.

Note: Students must note that in nuclear fusion a very high level of heat is required in order to fuse the two nuclei of the atoms together. Fusion reaction takes place in lighter nuclei of atoms. Nuclear fusion is a type of reaction where two or more nuclei are combined together to form one or even more number of atomic nuclei and subatomic particles.