First slide

Water Pollution and its Control

Question

BOD indicates the amount of

Moderate

A

Biodegradable organic matter in water
B

Nonbiodegradable organic matter in water
C

Inorganic organic matter in water
D

Greenhouse gases in atmosphere

Solution

Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. It indicates the amount of biodegradable organic matter in water.

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