Single correct option
The energy of the Sun is produced mainly by the nuclear process in which
- A. hydrogen nuclei fuse to form helium
- B. uranium nuclei split into lighter nuclei
- C. helium nuclei decay into hydrogen
- D. carbon burns in oxygen
Show answer and solution
Answer: (A) hydrogen nuclei fuse to form helium
In the Sun's core, hydrogen nuclei fuse into helium at very high temperature and pressure, releasing enormous energy (nuclear fusion). Splitting of heavy nuclei is fission used in reactors. Chemical burning cannot sustain the Sun's output for billions of years.
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