Question

Fusion reaction takes place at very high temperature because

• A. atoms are ionised at high temperatures
• B. molecules breakup at high temperature
• C. nuclei break up at high temperature
• D. kinetic energy is high enough to overcome repulsion between nuclei

Answer 1

The correct option is D kinetic energy is high enough to overcome repulsion between nuclei

Fusion reactions takes place at temperature about ${10}^{7}K$ it requires this high temperature so that nucleus are moving at very high speed, so that they have high kinetic energy and can overcome the repulsion between nuclei and come together.