Environmental chemistry Mcq Quiz

Atmosphere :Air Pollution,Meteorology, Vehicular Pollution, Green House Effect and Global Warming ,Ozone layer-The Earth Protective Umbrella –Environmental chemistry Mcq Quiz Question and Answer

Question and Answer -Environmental chemistry Mcq Quiz

1.Air temperature in troposphere decreases with height at the rate of
(a) 6.5°C per km
(b) 5.5°C per km
(c) 4.5°C per km
(d) 3.5°C per km
ANSWER-(a) 6.5°C per km

2.The fifth zone of atmosphere is
(a) Troposphere
(b) Anthrosphere
(c) Mesosphere
ANSWER-(b) Anthrosphere

3.The energy transport plays a vital role in maintaining the earth’s radiation balance and
this proceeds through the mechanism of

(a) Conduction of energy
(b) Convection of energy
(c) Re-absorption of most of the outgoing infrared radiations
(d) All mechanisms are involved
ANSWER-(d) All mechanisms are involved

4.Gaseous and sedimentary cycles are tied to the
(a) Nitrogen cycle
(b) Oxygen cycle
(c) Hydro-logical cycle
(d) Phosphorus cycle
ANSWER-(c) Hydro-logical cycle

5.The solar energy reaching the surface of earth each year is about
(a) 2.19×1022 kw
(b) 4x 1018 kw
(c) 1.5×1020 kw
(d) 5×1022 kw
ANSWER-(d) 5x 1022 kw

Atmosphere -Air Pollution

1.At equilibrium, O2/ O3 ratio is 1025 while at an altitude of 30km it is
(a) 3x 105
(b) 2x 105
(c) 1030
(d) 1020
ANSWER-(a) 3x 105

2.When the environmental lapse rate and the dry adiabatic lapse rate exactly same
the atmosphere is said to be

(a) Unstable
(b) Neutrally stable
(c) Super adiabatic
(d) Sub adiabatic
ANSWER-(b) Neutrally stable

3. Sinks of atmospheric gases are
(a) Oceans and vegetation
(b) Soil micro-organisms
(c) Lime stone wall as
(d) All act sinks
ANSWER-(d) All act sinks

4.Particulates can be formed by
(a) Dispersion
(b) Coagulation
(d) All processes
ANSWER-(d) All processes

5.At Seveso, Italy, the disaster in 1976, was due to
(a) DDT
(b) BHC
(d) 2,4-D

6. The photo dissociation of O2 could occur if the wavelength of radiation is
(a)<240 nm

(b) >240 nm
(c) 280 nm
(d) 315 nm
ANSWER-(a)<240 nm

7. Temperature inversion limits
(a) Vertical mixing of pollutants
(b) Horizontal mixing of pollutants
(C) Photo chemical smog
(d) London smog
ANSWER-(a) Vertical mixing of pollutants

8. Pollutants emitted by jet planes are
(a) Smoke
(b) Aerosols
(C) Smog
(d) Fog
ANSWER-(b) Aerosols

9. Aerosols of natural origin with diameter less than 0.2 u are called
(a) Aitken particles
(b) Colloidal particles
(c) Particulates
(d) Suspension
ANSWER-(a) Aitken particles

10. Bhopal gas tragedy is a case of
(a) Thermal pollution
(b) Air pollution
(C) Nuclear pollution
(d) Soil pollution

ANSWER-(b) Air pollution


1.The dispersion of air pollutants at particular place a are influenced by
(a) Meteorological factors
(b) Wind speed and wind direction
(d) All
ANSWER-(d) All

2.The value of adiabatic lapse rate for dry air is about
(a) 10°C/km
(b) 6.5°C/km
(c) 15°C/km
(d) 4.5 °C/km
ANSWER- (a) 10°C/km

3. For many air pollution episodes in the world,the major responsible factor is
(a) Dispersion of pollutants
(b) Inversion
(c) Lapse rate
ANSWER-(b) Inversion

4. The cleaning of pollutants may take place by
(a) Rain out
(b) Fall out
(c) Wash out
(d) All
ANSWER-(d) All

5. When the atmosphere is very stable, the gaseous effluent forms a
(a) Fanning plume
(b) Trapping
(c) Coning
(d) Lofting
ANSWER-(a) Fanning plume

6. When strong lapse rate occurs at the lower layers and inversion in upper layers, the
observed plume is

(a) Coning
(b) Fumigation
(c) Looping
(d) None
ANSWER-(b) Fumigation

7. When super adiabatic lapse rates occur,looping plumes are observed because
(a) Turbulence is more mechanical than thermal
(b) OF the development of large thermal eddies in the unstable air
(c) Rapid upward diffusion
(d) Inversion layers
ANSWER-(b) OF the development of large thermal eddies in the unstable air

8. The inversion which results from the normal diurnal cooling cycle is
(a) Radiational
(b) Subsidence
(c) Advective
(d) None
ANSWER-(a) Radiational

9. The knowledge of meteorological factor is helpful in
(a) Location of an industrial plant
(b) Design of pollution control equipment
(c) Establishing air quality criteria
(d) All are correct
ANSWER-(d) All are correct

10. The boundaries between temperature and subtropical air circulation
zones are known as

(a) Hadley cells
(b) Polar fronts
(c) Horse latitudes
(d) Polar zones
ANSWER-(c) Horse latitudes

Vehicular Pollution-Environmental chemistry Mcq Quiz

1.The fuel which one contains only carbon atom is
(a) CNG
(b) LPG
(C) Petrol
(d) Diesel

2.The alternative fuel(s) is (are)
(a) CNG or LPG
(b) H2 fuel
(c) Biodiesel
(d) All
ANSWER-(d) All

3. The oxygenates added to gasoline are
(a) Methyl tertiary butyl ether (MTBE)
(b) Tertiary butyl alcohol (TBA) and Di-isopropyl ether (DIPE)
(c) Ethyl tertiary butyl ether (ETBE)
(d) All act as oxygenates
ANSWER-(d) All act as oxygenates

4. The biodegradable oxygenate is
(a) MTBE
(b) C2H5OH
(d) ETBE

5. Compared to vehicles powered by internal combustion engines, fuel cell powered

(a) Have high energy conversion efficiency
(b) Create zero pollution
(c) Emit CO2 and water vapour only
(d) All are correct
ANSWER-(d) All are correct

Green House effect and global warming

1.Green house coefficient of the earth is


2.The region of atmospheric window lies in the range of
(a)8 μm to 12μm
(b)7.5 μm to 13 μm
(c)4 μm to 7.5 μm
(d) 13 μm to 20 μm
ANSWER-(b)7.5 μm to 13 μm

3.The relative instantaneous radiative forcing value for CO2 is arbitrarily fixed at
(a) 1
(b) 21
(c) 43
(d) 25

4.The maximum global warming potential is of
(a) N2O
(b) CH4
(c) CFC
(d) CO2

5..The major sink for nitrous oxide is
(c) Oceans
(d) Vegetation

6.. EI Nino episodes have occurred after every
(a) 2 to 7 years
(b) 4 to 10 years
(c) 2 to 5 years
(d) 3 to 8 years
ANSWER-(a) 2 to 7 years

7. In Antarctica, a huge chunk of Larsen ice shelf broke loose and sheered away into the
Ocean in

(a) May 2005
(b) March 2002
(c) June 2006
(d) April 2003
ANSWER-(b) March 2002

8. EI Nino is a meteorological phenomenon marked by
(a) Lower atmospheric pressure
(b) Higher water temperature
(c) Both (a) and (b)
(d) Lower water temperature
ANSWER-(c) Both (a) and (b)

9. Pacific decadal oscillation has roughly
(a) 50 year cycle
(b) 20 year cycle
(C) 7 year cycle
(d) 10 year cycle
ANSWER-(a) 50 year cycle

10. El Nino is also known as
(a) Infant terrible
(b) Bay terror
(c) Both (a) and (b)
(d) La Nina
ANSWER-(c) Both (a) and (b)

Ozone layer- The Earth protective umbrella

1.The existence of ozone belt around the earth is mainly responsible for filtering out
(a) Ultraviolet radiations
(b) Infra red rays
(c) Cosmic rays
(d) Microwaves
ANSWER-(a) Ultraviolet radiations

2.The maximum concentration of ozone in the stratosphere is
(a) 5x 1010 mol cm-2
(b) 5×1012 mol cm-3
(c) 5x 1011 mol cm-2
(d) 5x 109 mol cm-3
ANSWER-(b) 5×1012 mol cm-3

3.In stratosphere,the average thickness of ozone layer is about
(a) 230 DU
(b) 300 DU
(c) 250 DU
(d) 200 DU
ANSWER-(a) 230 DU

4.Ozone can absorb short wavelength UV radiation in the range
(a) 200 to 240 nm
(b) 240 to 320 nm
(c) 320 to 350 nm
(d) 180 to 200 nm
ANSWER-(b) 240 to 320 nm

5.Nuclear explosions produce large quantities of
(a) OH ions
(b) Cl ions
(c) NO2
(d) SO2

6.The zero ODP value is of :
(a) HFCs
(b) CFCs
(c) HCFCs
(d) None

7.Ozone loss over Antarctica was first detected in
(a) April 1981
(b) October 1980
(c) May 1980
(d) June 1981
ANSWER-(b) October 1980

8.A series of chloro fluoro carbons, in 1940, were developed by
(a) Chubachi
(b) Sherwood
(c) Du Pont
(d) Chapman
ANSWER-(c) Du Pont

9. The ODP of a specific chemical takes into account
(a) Reactivity of species
(b) Atmospheric lifetime of the species
(c) Molar mass of the species
(d) All are correct
ANSWER-(c) Molar mass of the species

10.Chloro fluoro carbons do not absorb light of wavelength above
(a) 290 nm
(b) 200 nm
(c) 170 nm
(d) 236 nm
ANSWER-(a) 290 nm

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