Environmental Chemistry
Exam Duration: 45 Mins Total Questions : 30
The region of atmosphere nearest to the earth is
- (a)
troposphere
- (b)
stratosphere
- (c)
mesosphere
- (d)
NONE OF THE ABOVE
Which one of the following is not a gaseous air pollutant?
- (a)
H2S
- (b)
SO2
- (c)
NO2
- (d)
O3
Which one of the following gases even at lower concentrations can cause temporary spasm of the smooth muscle of bronchioles, cough, shortness of breath, spasm of the larynx, acute irritation to the membranes of the eyes, resulting in tears and redness?
- (a)
CO
- (b)
SO2
- (c)
NO
- (d)
O3
Which one of the following is not a green house gas?
- (a)
CH4
- (b)
Ozone
- (c)
CF2Cl2
- (d)
NO
Government of India announced an action plan called Taj Trapezium to Prevent the disfiguring of the historical monument called 'Taj' as early as in the year
- (a)
1992
- (b)
1993
- (c)
1994
- (d)
1995
Which one of the following gases is mainly responsible for the formation of photochemical smog?
- (a)
NO
- (b)
SO2
- (c)
CO2
- (d)
O3
Which one of the following reactions is not involved in the formation of photochemical smong?
- (a)
\(NO_{ 2 }\quad (g)\quad \underrightarrow { hv } \quad NO\quad (g)\quad +\quad o(g)\)
- (b)
\(O_{ 3 }\quad (g)\quad \rightarrow \quad O_{ 3 }\quad (g)\quad +\quad O(g)\)
- (c)
\(NO\quad (g)\quad +\quad O_{ 3 }\quad (g)\quad \rightarrow \quad NO_{ 2 }\quad (g)\quad +\quad O_{ 2 }\quad (g)\)
- (d)
\(3CH_{ 4 }\quad +\quad 2O_{ 3 }\quad \rightarrow \quad 3CH_{ 2 }\quad =O\quad +\quad 3H_{ 2 }O\)
The brownish haze of photochemical smog is largely attributed to
- (a)
NO
- (b)
NO2
- (c)
CO
- (d)
SO2
Which of the following is not included in the photochemical smog?
- (a)
formaldehude
- (b)
acrolein
- (c)
PAN
- (d)
acetone
Ozone depletion over Antarctica occurs during
- (a)
spring
- (b)
winter
- (c)
summer
- (d)
rains
Which of the folllowing is not an organic water pollutants?
- (a)
animal waste
- (b)
sewage
- (c)
chemical fertilizers
- (d)
decaying animals
The pH of drinking water should be between
- (a)
9.5 to 10
- (b)
5.5 to 9.5
- (c)
5.5 to 6.25
- (d)
NONE OF THE ABOVE
Which one of the following is not matched with respect to international standards for drinking water?
- (a)
Fe : 0.2 ppm or mgdm-3
- (b)
Mn : 0.05 ppm
- (c)
Cd : 0.005 ppm
- (d)
Al : 0. ppm
Bhopal gsd tragedy occured due to leakage of deadly poisonous gas called methyl isocyanate (MIC). It happened on
- (a)
December 2, 1984
- (b)
December 2, 1984
- (c)
December 4, 1984
- (d)
December 4, 1983
The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended up to 10km from sea level. This layer is
- (a)
stratosphere
- (b)
troposphere
- (c)
mesosphere
- (d)
hydrosphere
Smog is formed in the places having
- (a)
low temperature
- (b)
high temperature
- (c)
excessive SO2 in the air
- (d)
excessive NH3 in the air
Taj Mahal is threatened by pollution from
- (a)
chlorine
- (b)
sulphur dioxide
- (c)
hydrogen
- (d)
oxygen
Select the wrong statement
- (a)
ozone is not responsible for green house effect
- (b)
ozone hole is thinning of ozone layer present in the stratophere.
- (c)
ozone is produced in upper stratosphere by the action of UV rays on oxygen
- (d)
ozone can oxidise sulphur dioxide present in the atmosphere to sulphur trioxide.
Which of the following causes Minamata disease?
- (a)
Chromium
- (b)
Cadmium
- (c)
Lead
- (d)
Mercury
Amount of dissolved oxygen in a water body for healthy aquatic life must be equal to
- (a)
2 ppm
- (b)
5 ppm
- (c)
4 ppm
- (d)
10 ppm
Major source of water and soil pollution is
- (a)
agro industry
- (b)
thermal power plant
- (c)
mining
- (d)
All of the above
High mutation rate and increasing skin cancer is due to
- (a)
CO pollution
- (b)
CO2 pollution
- (c)
ozone depletion
- (d)
acid rain
Organomercury compound are
- (a)
fungicides
- (b)
fumigants
- (c)
herbicides
- (d)
soil conditioners
As it passes into food chain, the concentration of DDT
- (a)
remains same
- (b)
decreases
- (c)
increases
- (d)
unpredictable
The gas leaked from a storage tank of the Union carbide plant in Bhopal gas tragedy was
- (a)
methyl isocyanate
- (b)
methyl amine
- (c)
ammonia
- (d)
phosgene
What is DDT among the following?
- (a)
Greenhouse gas
- (b)
A fertiliser
- (c)
Biodegradable pollutant
- (d)
Non-biodegradable pollutant
Identify the incorrect statement from the following.
- (a)
oxides of nitrogen in the atmosphere can cause the depletion of ozone layer
- (b)
ozone absorbs the intense ultraviolet radiations of the sun
- (c)
depletion of ozone layer is because of its chemical reactions with chlorofluorocarbons
- (d)
ozone absorbs infrared radiations
Identify the wrong statement in the following
- (a)
chlorofluorocarbons are responsible for ozone layer depletion
- (b)
green house effect is responsible for global warming
- (c)
ozone layer does not permit infrared radiation from the sun to reach the earth
- (d)
acid rain is mostly because of oxides of nitrogen and sulphur
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