The value of BOD of highly polluted water is

Highly polluted waters have

The value of BOD of clean water is

Arrange the following options in ascending order of their BOD value: 1. Sample of highly polluted pond water. 2. Sample from unpolluted pond water. 3. Distilled water.

BOD value of clean and polluted water:

Assertion : The amount of BOD in the water is a measure of the amount of organic material in the water . Reason : Clear water has BOD less than 5 ppm whereas highly polluted water can have BOD value of 17 ppm or more .

Read the following statements and select the correct option. Statement 1 : BOP represents the amount of dissolved oxygen that would be consumed if all the organic matter in one litre of water were oxidised by microorganisms. Statement 2 : High value of BOD indicates that water is highly polluted by organic matter.

Assertion : BOD of river polluted by sewage is more than 20 ppm. Reason: Polluted river contains excess of organic matter.

Assertion: The greater the BOD of waste water, less is its polluting potential. Reason: The effuent from the primary treatment plant is generally released into natural water bodies like rivers and streams.

Which of the following is True/false The lower the BOD of waste water more is its polluting potential