High value of BOD (Biochemical Oxygen Demand) indicates that:

  • Option 1)

    water is less polluted

  • Option 2)

    consumption of organic matter in the water is higher by the microbes

  • Option 3)

    water is pure

  • Option 4)

    water is highly polluted

 

Answers (1)

As we learnt in

Causes of water pollution -

Oil pollution

- wherein

Oil is a source of pollution in sea-water. Oil pollution is due to ship accidents, loading and discharging of oil at the harbour, oil refineries and off-shore oil production. Degree of impurity of after due to organic matter is measured in terms of BOD (Biochemical Oxygen Demand). It is the demand for O2 to decompose organic wastes in liter of water.

 

 

 


Option 1)

water is less polluted

Incorrect

Option 2)

consumption of organic matter in the water is higher by the microbes

Incorrect

Option 3)

water is pure

Incorrect

Option 4)

water is highly polluted

Correct

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