Chemistry - Environmental Chemistry
Exam Duration: 45 Mins Total Questions : 30
Which one of the following region contains 80% of the total mass of air and almost all of the water vapours?
- (a)
Stratosphere
- (b)
troposphere
- (c)
mesosphere
- (d)
NONE OF THE ABOVE
The gases that produce photochemical smog are
- (a)
oxides of nitrogen
- (b)
oxides of sulphur
- (c)
oxides of carbon
- (d)
NONE OF THE ABOVE
Which one of the following gases binds (about 200 times) to haemoglobin than oxygen?
- (a)
CO2
- (b)
CO
- (c)
NO
- (d)
NO2
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 of the following is not a non-viable particulate?
- (a)
mists
- (b)
smoke
- (c)
fumes
- (d)
smogs
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
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
Primary constituents of photochemical smog are
- (a)
CO2 and NO2
- (b)
SO2 and CO
- (c)
NO2 and hydrocarbons
- (d)
hydrocarbons and CFXs
Most hazardous metal pollutant of automobile exhaust is
- (a)
Mercury
- (b)
lead
- (c)
cadmium
- (d)
copper
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
Biochemical oxygen demand, (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be
- (a)
rich in dissolved oxygen
- (b)
poor in dissolved oxygen
- (c)
highly polluted
- (d)
not suitable for aquatic life
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water dies because of
- (a)
large number of mosquitose
- (b)
increase in the amount of dissolved oxygen
- (c)
decrease in the amount of dissolved oxygen in water
- (d)
clogging of gills by mud
Sodium chlorate and sodium arsenite are used as
- (a)
herbicides
- (b)
insecticides
- (c)
fungicides
- (d)
soil conditioners
Major source of water and soil pollution is
- (a)
agro industry
- (b)
thermal power plant
- (c)
mining
- (d)
All of the above
Match the following and choose the correct option
Column I | Column II |
---|---|
A.Oxides of sulphur B.Nitrogen dioxide C.Carbon dioxide D.Lead |
p.Global warning q.Damage to kidney r.Respiratory diseases s.Red hazein traffic and congested areas |
- (a)
A B C D r s p q - (b)
A B C D s r q p - (c)
A B C D r p s q - (d)
A B C D p r q s
Sometimes ago, formation of polar stratospheric clouds was reported over Antarctica. What happens when such clouds break up by warmth of sunlight?
- (a)
ozone layer depletion stops
- (b)
ozone layer depletion starts
- (c)
HOCl and Cl2 are obtained
- (d)
Both (a) and (c)
Photochemical smog occurs in warm, dry and sunny climate. Amongst the following one is not the components of photochemical smog, identify it.
- (a)
NO2
- (b)
O3
- (c)
SO2
- (d)
Unsaturated hydroarbon
In Antarctica, ozone layer depletion is due to the formation of following compound
- (a)
peroxyacetyl nitrate
- (b)
SO2 and SO3
- (c)
acrolein
- (d)
chlorine nitrate
Which of the following when present in the exhaust gases of the vehicles causes pollution?
- (a)
Water vapours
- (b)
CO2
- (c)
CO
- (d)
C2H6
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
What is DDT among the following?
- (a)
Greenhouse gas
- (b)
A fertiliser
- (c)
Biodegradable pollutant
- (d)
Non-biodegradable pollutant
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
When rain is accompanied by a thunderstorm, the collected rain water will have a pH value.
- (a)
slightly lower than that of rain water without thunderstorm
- (b)
slightly higher than that when the thunderstorm is not there
- (c)
uninfluenced by occurrene of thunderstorm
- (d)
Which depends on the amount of dust in air