Question

The fuel used in the star is mainly:

• A. coal
• B. uranium
• C. radium
• D. hydrogen

Answer 1

The correct option is D

hydrogen

The explanation for the correct answer:

1. Hydrogen is the most abundant (~95 %) element found in the universe.
2. Stars are formed from the giant cloud of gas (hydrogen) and dust called nebulas.
3. Due to tremendous pressure inside the core the light nuclei of hydrogen fuse (addition) to form helium and a vast amount of energy.
4. This is called a nuclear fusion reaction.

The explanation for the incorrect answer:

1. Option A: coal is used in thermal power plants to generate electricity.
2. Option B: Uranium is used in nuclear power plants to generate electricity. It is also used in nuclear bombs.
3. Option C: Radium is used in making glow-in-dark paints.

Hence option D is the correct answer.