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Biology
Biological oxygen demand
What is the importance of measuring the BOD of a water body?
Biology
Biological oxygen demand
Measuring Biological Oxygen demand (BOD) is a method used for ______________
A) estimating amount of oxygen in sewage water
B) estimating the amount of organic matter in sewage water
C) Both A & B
D) none of these.
Biology
Biological oxygen demand
BOD is_________ in polluted water and __________ in portable water.
A. More, less
B. Less, medium
C. Medium, more
D. Less, more
Biology
Biological oxygen demand
Measuring ‘Biochemical Oxygen Demand’ (BOD) is a method used for?
Biology
Biological oxygen demand
Biochemical Oxygen demand in river water.
Biology
Biological oxygen demand
Relationship between DO and BOD is that they
A. Are directly proportional
B. Are inversely proportional
C. Are not related
D. Always remain equal to each other
Biology
Biological oxygen demand
What is B.O.D.?
A. The amount of \[{{O}_{2}}\] utilized by organisms in the water.
B. The amount of \[{{O}_{2}}\] utilized by microorganisms for decomposition.
C. The total amount of \[{{O}_{2}}\] present in water.
D. All of the above.
Biology
Biological oxygen demand
Limit of BOD prescribed by central pollution control board for the discharge of industrial and municipal wastewaters into natural surface waters, is
A.< 3.0 ppm
B.< 10 ppm
C.< 100 ppm
D.< 30 ppm
Biology
Biological oxygen demand
BOD is a measure of
(a) Industrial waste passed into water bodies
(b) Amount of carbon monoxide combined with hemoglobin
(c) Extent of pollution with organic matter
(d) Amount of oxygen required by plants during the night
Biology
Biological oxygen demand
Measurement of the rate of oxygen utilization by a unit volume of water over a period of time is to measure
(A) Fermentation
(B) Bio gas generation
(C) Bio synthetic pathway
(D) Biological oxygen demand
Biology
Biological oxygen demand
A large quantity of urban sewage is drained into the nearby Village River. Which among the given conditions would happen after mixing of sewage into the river?
i. Biochemical oxygen demand (BOD) of receiving water bodies increases.
ii. Dissolved oxygen of the receiving water body decreases.
iii. It will not cause mortality among fishes and other aquatic creatures.
iv. It will lead to the nutrient enrichment of receiving water bodies.
A. i,ii and iv
B. i,ⅱ and iv
C. ii and iii only
D. iii and iv only
Biology
Biological oxygen demand
Limit of B.O.D. prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is
A. \[ < 30ppm\]
B. \[ < 3.0ppm\]
C. \[ < 10ppm\]
D. \[ < 100ppm\]
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