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Home Objective Questions Question Answer
EXAM PREPARATION

Objective Question & Answer

QUESTION

Objective Question

Q.1

Statement (I): The BOD test is conducted for 5 days at 20°C.

Statement (II): The amount of oxygen utilized by microorganisms anaerobically is called BOD.

A
Both Statement I and Statement II are true and Statement II is the correct explanation of Statement I
B
Both Statement I and Statement II are true but Statement II is not a correct explanation of Statement I
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true
Answer ( Option C)

Statement I is true but Statement II is false

Solution
The BOD of water during the first five days at 20°C is generally taken as standard demand. If sufficient oxygen is present in water the useful aerobic bacteria will flourish and cause organic biological decomposition of water and matter.
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