Question

Fusion reaction takes place at high temperature because:
(A) KE is high enough to overcome repulsion between nuclei
(B) Nuclei are most stable at this temperature
(C) Nuclei are unstable at this temperature
(D) None of the above

Answer 1

In nuclear physics, there are two types of the reaction, they are nuclear fission and the nuclear fusion reaction. And these two reactions are opposite to each other. During these two reactions, the large amount of the energy is released.

Complete answer:
Nuclear fusion is a response where at least two nuclear cores are consolidated to frame at least one diverse nuclear core and subatomic particles (neutrons or protons). The distinction in mass between the reactants and items is shown as either the delivery or the ingestion of energy. This distinction in mass emerges because of the distinction in nuclear restricting energy between the cores when the response. Fusion is the cycle that powers dynamic or principle succession stars and other high-size stars, where a lot of energy is delivered.
A fusion cycle that produces cores lighter than iron or nickel will by and large deliver energy. These components have moderately little mass per nucleon and huge restricting energy per nucleon. Fusion of cores is lighter than these deliveries energy (an exothermic cycle), while fusion of heavier cores brings about energy held by the item nucleons, and the subsequent response is endothermic. The inverse is valid for the converse cycle, nuclear parting.
This implies that the lighter components, for example, hydrogen and helium, are all in all more fusible; while the heavier components, for example, uranium, thorium and plutonium, are more fissionable. The outrageous astrophysical occasion of a supernova can deliver enough energy to intertwine cores into components heavier than iron. And also, the kinetic energy is high enough to overcome repulsion between nuclei.

Hence, the option (A) is the correct answer.

Note:
In order to do the nuclear fusion reaction, some amount of the energy is required to combine the two elements to conduct the nuclear fusion reaction. There must be the repulsion force between the two elements but the kinetic energy of the two elements is more than the fusion reaction takes place.