Question

Which of the following statements is/are correct?
A) Receptor is the medium which is affected by the pollutant.
B) Sink is the medium that retain the effect of pollutant.
C) COD measures the organic pollution of water.

• A. $A$ and $B$
• B. $B$ and $C$
• C. $C$ and $A$
• D. $A,B$ and $C$

Answer 1

The correct option is D $A,B$ and $C$

Chemical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water.
The "medium" (e.g. soil) or organism (e.g. fish) affected by the pollutant or contaminant is called a receptor, while a sink is a chemical medium or species that retains and interacts with the pollutant.