A radioactive substance is emitting \( \beta^{-} \) particles at a certain rate. When it is heated to a high temperature, the rate of emission
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → remains same
Radioactive decay is a nuclear process governed by the forces inside the nucleus, so its rate \( \lambda N \) is independent of temperature, pressure and chemical state; heating changes the energy of the atoms but not the state of the nucleus.