
Dissolved oxygen
Quiz
•
Chemistry
•
University
•
Hard

CHRISTINE JEYASEELAN
Used 13+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
In what form does oxygen exist in water?
Nascent oxygen
Molecular state
Combined with hydrogen
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A low dissolved oxygen content in water indicates
High level of pollution in water
Low level of pollution
Not related to pollution level
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is manganese sulphate added to the solution?
To dissolve the precipitate
To convert molecular oxygen into precipitate form
To get correct end point
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Why is azide added to the solution?
To remove the interference due to nitrites
To convert molecular oxygen into a precipitate
To carry out the titration effectively
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the colour change for the titration?
Blue to colourless
Colourless to blue
Yellow to Blue
Blue to yellow
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The method used for determination of dissolved oxygen is called as
Iodimetric method
Wrinkler method
Alsterberg method
Volumetric method
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Why is sulphuric acid added during the titration?
To increase the acidity of the solution
To get an accurate end point
To dissolve the precipitate and release nascent oxygen
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