Which of the following isotopes is used as a fuel in nuclear power plants for generating electricity?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Uranium-235.
Uranium-235 (U-235) is used as a fuel in nuclear power plants for generating electricity. U-235 is a fissile isotope, meaning it can undergo nuclear fission when bombarded by slow-moving neutrons. During fission, it releases a large amount of energy, which is used to heat water and generate steam to drive turbines for electricity production. It can sustain a controlled chain reaction, making it suitable for use in nuclear reactors.