Category: Pollution Mcqs

A.Natural flora of a place
B.Natural balance of our environment
C.Natural geo-chemical cycles
D.All the above three
undefined

A.Eel
B.Crab
C.Sea gull
D.Phytoplanktons
undefined

A.Algae
B.Bacteria
C.Higher plants
D.Man
undefined

A.245 ppm
B.275 ppm
C.215 ppm
D.230 ppm
undefined

A.Biotic oxygen deduction
B.Base of degradation
C.Biotic oxide demand
D.Biological oxygen demand
undefined

A.Water
B.Air
C.Noise
D.Soil
undefined

A.Its cost of production is high
B.It is not rapidly degraded in nature
C.Organisms at once developed resistance to it
D.It is significantly less effective than other pesticides
undefined

A.China
B.Antarctica
C.Europe
D.Africa
undefined

A.Alga
B.Lichen
C.Pinus
D.Mustard
E.Fern

A.35-45 db
B.1-5 db
C.40-60 db
D.65-75 db
undefined