Dissolved Oxygen - Viva

Dissolved Oxygen - Viva

University

10 Qs

quiz-placeholder

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Dissolved Oxygen - Viva

Dissolved Oxygen - Viva

Assessment

Quiz

Other

University

Practice Problem

Hard

Created by

NISHIDA A

Used 38+ times

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10 questions

Show all answers

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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