Which of the following statements about a radioactive substance is/are correct? l. lt emits radiation continuously and spontaneously. ll. The emitted radiat...

Which of the following statements about a radioactive substance is/are correct? l. lt emits radiation continuously and spontaneously. ll. The emitted radiations are affected by temperature and pressure III. The radiation can penetrate opaque matter

Answer Details

The correct statement(s) about a radioactive substance is/are l and lll only. Radioactive substances emit radiation continuously and spontaneously. The emitted radiations are not affected by temperature and pressure, hence statement ll is incorrect. Radiation can penetrate opaque matter, which is why it is important to handle radioactive substances with caution and protective gear. Therefore, statement lll is correct.