Exams › NEET › Chemistry

The amount of oxygen required to oxidise organic substances present in water is called:

1. Dissolved oxygen (DO)
2. Chemical oxygen demand (COD)
3. Biochemical oxygen demand (BOD)
4. The threshold limit value (TLV)

Correct answer: Biochemical oxygen demand (BOD)

Solution

Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by microorganisms to decompose organic substances in water. It reflects the biodegradable organic pollution load, unlike DO which is the oxygen already available in water.

Related NEET Chemistry questions

• Which of these are particulates?
• Untreated domestic sewage has a low:
• Which is among the greatest contributors to gaseous pollutions that are responsible for acidic rain?
• Chlorofluorocarbons (CFCs) are widely used in air conditioners, refrigerators etc, because of being:
• Which of the following is a nonbiodegradable pollutant?
• Sulphur dioxide levels in the atmosphere can be reduced by using:

⚔️ Practice NEET Chemistry free + battle 1v1 →