
Dissolved Oxygen - Viva
Quiz
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Other
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University
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Practice Problem
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Hard
NISHIDA A
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
High amount of Dissolved Oxygen in a lake indicate --------
Excessive aquatic plant or algae blooms
Better water quality
High turbidity
Less water quality
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
If sample water does not contain enough microorganism then what needed to be done
Seeding the sample
Boiling the sample
Treating it with alkaline solution
All of the above
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Why is the Concentrated Sulphuric acid added to the sample after precipitates settle down?
To neutralize alkaline iodide-azide solution
For dissolution of precipitate
To prevent escape of iodide ions from solution for titration
None of these
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
According to drinking water specification provided by IS 10500 (2012), what should be range of DO of drinking water
Greater than 2mg/l
Less than 1mg/l
Greater than 1mg/l
None of the above
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The method used to measure Dissolved Oxygen in this experiment is----------
Mohr's method
EDTA method
Winkler's method
Titrimetric method
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A minimum DO of A minimum DO of-------------- is desirable for the survival of aquatic life
4 to 5 mg/l
1 to 2 mg/l
2 to 3mg/l
5 to 6mg/l
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Choose the reagents used for DO determination
Manganese sulphate
Alkali iodide azide
None of the above
All of the above
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