Consider the following statements regarding ionizing radiations 1 They include long wavelength ultra...........

Geography and Environment World climates

Consider the following statements regarding ionizing radiations:

1. They include long wavelength ultraviolet radiations (UV), X-rays, and gamma rays.

2. Electrically charged particles produced in nuclear processes can knock electrons out of atoms or molecules, producing ions.

3. Gamma rays passing through a cell can ionize water molecules near the DNA, potentially causing DNA to break and damage living tissues.

How many of the above statements are not correct?

Only one

Only two

All three

None

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Explanation:

Ionizing radiations: Electromagnetic radiations such as short wavelength ultra violet radiations (UV), X-rays and gamma rays and energetic particles produced in nuclear processes, electrically charged particles like alpha and beta particles produced in radioactive decay and neutrons produced in nuclear fission, are highly damaging to living organisms. Hence, statement 1 is not correct. • Electrically charged particles produced in the nuclear processes can have sufficient energy to knock electrons out of the atoms or molecules of the medium, thereby producing ions. The ionizing radiations cause damage to biological systems and are, therefore are pollutants. Hence, statement 2 is correct. • A gamma ray passing through a cell, can ionise the water molecules near the DNA. These ions might react with the DNA causing it to break. They can also cause chemical changes by breaking the chemical bonds, which can damage living tissues.Hence, statement 3 is correct.