Water filled in two glasses A and B have BOD values of 10 and 20 , respectively . The correct statement regarding them , is 

  • Option 1)

    B is more polluted than A .

  • Option 2)

    A is suitable for drinking , whereas B is not .

  • Option 3)

    Both A and B are suitable for drinking .

  • Option 4)

    A is more polluted than B .

Answers (1)
A admin

 

Biochemical oxygen demand (BOD) -

The amount of oxygen required for five days in one litre of water at 200 C for the microorganisms to metabolite organic waste.

- wherein

Clear water has BOD less than 5 ppm , highly polluted water has BOD of 17 ppm or more.

As we have learnt in BOD

3-5 ppm is clean

6-19 ppm is polluted

Hence 'B' is more polluted than 'A'.

 

 


Option 1)

B is more polluted than A .

Option 2)

A is suitable for drinking , whereas B is not .

Option 3)

Both A and B are suitable for drinking .

Option 4)

A is more polluted than B .

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