Environmental Pollution_3

Increase in water temperature decreases dissolved ______________in water which adversely affects aquatic life.

• nitrogen

• carbon dioxide

• oxygen

• sulphur

groundwater is a clean source of water

• True

• False

The enrichment of water bodies with nutrients causes ____________ of the water body

• acidification

• eurification

• eutrophication

• nutrifiction

Full Form of BOD

• Bio Oxy Demand

• biological demand for oxygen

• Bio Oxygen dioxide

The biological demand for oxygen (BOD) _____________ with the increase in aquatic organisms

• increases

• decreases

• constsant

The sudden and explosive growth of phytoplankton and algae impart green colour to the water is known as water bloom, or “_______________

• photo synthesis

• eutrophication

• algal blooms

Waste water from domestic or industrial sources or from garbage dumps is generally known as ____________

• dustbin

• sewage

• pipes

• canal

The treatment involves three stages:

• Primary

• Secondary

• Tertiary

• Quaternary

______________treatment remove suspended particulate matter

• secondary

• primary

• tertiary

The residue obtained from primary treatment one known as _____________.

• sewage

• sludge

• pollutant

• dust