The minimum amount of energy required to ionize an atom or a molecule by withdrawing the electrons from its domain is called ionizing radiation.
The correct answers are:
- Option A. It forms ozone in the stratosphere
- Option D. It ionizes atoms and molecules in the thermosphere
This can be explained by:
- The zone between the mesosphere and exosphere is called the thermosphere.
- In this layer photo-ionization and dissociation of the molecules and atoms due to ultraviolet occurs.
- In the stratosphere, the ozone gets formed by UV rays.
- The UV splits the oxygen molecules into two atoms, the free atom of oxygen then combines with O₂ and forms ozone (O₃).
Therefore, ionization forms the ozone and ionizes the atom and molecules of the thermosphere.
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