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Which of the option shows following exam...

Which of the option shows following examle in ascending ordr in terms f BOD
(i) Distilled water
(ii) Tap water
(iii) Sewage wastes drained in river

A

i-ii-iii

B

iii-iii

C

iii-iii

D

iii-ii-i

Text Solution

Verified by Experts

The correct Answer is:
A
The BOD test measures the rate of uptake of oxygen by microorganisms. BOD is a measure of the organic matter present in the water. The greater the BOD of wastewater more is its polluting potential. Distilled water < Tap water < Sewage water.
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