NEET Biology question

Not in NEET syllabus

Biochemical Oxygen Demand (BOD) in a river water **[AIPMT 2009]**

(A)Remains unchanged when algal bloom occurs
(B)Has no relationship with concentration of oxygen in the water
(C)Gives a measure of *Salmonella* in the water
(D)Increase when sewage gets mixed with river waterCorrect

Answer: (D)

Solution

When sewage, rich in organic matter, mixes with river water, microorganisms consume increasing amounts of dissolved oxygen to decompose this organic load, directly raising the river's BOD; BOD is thus

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-129990