C, N and O all belong to the same period, in which it's 2nd Period.
<h2>Answer:</h2>
<u>The statement is </u><u>False</u>
<h2>Explanation:</h2>
Contaminated rags may contain plastic and other materials that cannot be defused in soil and they remain there for a long period of time. Another reason to avoid disposal of contaminated material in earth is that it may also contain toxic materials which may result into land pollution. So it is not recommended to dispose contaminated rags in landfills.
