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Questions
1
GATE CE 2022 Set 1
MCQ (More than One Correct Answer)
+1
-0

For wastewater coming from a wood pulping industry, Chemical Oxygen Demand (COD) and 5-day Biochemical Oxygen Demand (BOD5) were determined. For this wastewater, which of the following statement(s) is/are correct?

A
COD > BOD5
B
COD $$\ne$$ BOD5
C
COD < BOD5
D
COD = BOD5
2
GATE CE 2022 Set 1
MCQ (Single Correct Answer)
+1
-0.33

Henry's law constant for transferring O2 from air into water, at room temperature, is 1.3 $${{mmol} \over {liter - atm}}$$. Given that the partial pressure of O2 in the atmosphere is 0.21 atm, the concentration of dissolved oxygen (mg/liter) in water in equilibrium with the atmosphere at room temperature is

(Consider the molecular weight of O2 as 32 g/mol)

A
8.7
B
0.8
C
198.1
D
0.2
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