Why is a fusion reaction difficult to perform?

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The nuclei are set up far from each other

The attraction between the nuclei

Sun’s energy is not sufficient

Repulsion between the nuclei

answer is D.

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Detailed Solution

For the fusion reaction to occur, the light nuclei are brought closer to each other, at a distance of about 10-14 m. This is only possible at a very high temperature to counter the repulsive force between the two nuclei. Due to this reason, the fusion reaction is difficult to perform.

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