First slide

Hydrogen

Question

Hydrogen can be fuse to form helium at

Moderate

A

High temperature and high pressure
B

High temperature and low pressure
C

Low temperature and high pressure
D

Low temperature and low pressure

Solution

A fusion reaction is difficult to occur because positively charged nuclei repel each other. At very high temperatures of the order of $10^{6}$ the nuclei may have sufficient energy to overcome the repulsive forces and fuse. It is for this reason, fusion reactions are also called thermonuclear reactions. Hence, hydrogen can be fused to form helium at high temperature and high pressure.

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