Dissolved oxygen

Dissolved oxygen

University

10 Qs

quiz-placeholder

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Dissolved oxygen

Dissolved oxygen

Assessment

Quiz

Chemistry

University

Hard

Created by

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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