Of the gases listed below, which is NOT believed to be responsible for enhancing the earth’s greenhouse effect?
A. Chlorofluorocarbons (CFCs)
B. Molecular oxygen (O2)
C. Nitrous oxide (N2O)
D. Carbon dioxide (CO2)
E. Methane (CH4)
Category: Environmental Science
Environmental science MCQ is the section of General knowledge MCQ Questions for all exam like competitive exam, interview and entrance test, Government exams, State and UPSC Civil Services Examinations, PSC, SSC, cgl, ibps,ias, ras , Bank exams and other various exams
Most harmful environmental pollutants are ____________.
A. natural nutrients in excess
B. human organic wastes
C. non-biodegradable chemicals
D. waste animal feed
The most abundant gases in the earth’s atmosphere by volume are ____________.
A. Carbon dioxide and nitrogen
B. Oxygen and water vapor
C. Nitrogen and oxygen
D. Oxygen and helium
E. Oxygen and ozone
An increase in albedo would be accompanied by ______________ in radiative equilibrium temperature.
A. An increase
B. A decrease
C. No change
D. Unstable oscillations
Cigarette smoking exposes one to ____________.
A. Sulphur dioxide
B. Carbon dioxide
C. Nitrogen peroxide
D. Carbon monoxide
Many wild plant and animals are on the verge of extinction due to ____________.
A. Habitat destruction
B. Climatic changes
C. Non availability of food
D. None of the above
Sea water is ____________.
A. acidic
B. alkaline
C. neutral
D. hypotonic
The thickness of ozone layer is measured in ____________.
A. Mm
B. Du
C. Nm
D. Hg
Nitrogen gas returns to the atmosphere by the action of ____________.
A. Nitrogen fixing bacteria
B. Denitrifying bacteria
C. Nitrifying bacteria
D. Nitrate fertilizers
Which phytoplankton exists at the size of 60 micro metre?
A. Nanoplankton
B. Ultraplankton
C. Net plankton
D. Picoplankton
