JEE Main Chemistry - Environmental Chemistry
Exam Duration: 60 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 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
Which one of the following is not a particulate pollutant?
- (a)
dust
- (b)
mist
- (c)
smoke
- (d)
CO
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
CO2 is a natural constituent of the atmosphere and is vital to all forms of plant life. It is present in the atmosphere to the extent of about
- (a)
0.03% by volume of the atmosphere
- (b)
0.01% by volume of the atmosphere
- (c)
0.02% by volume of the atmosphere
- (d)
0.04% by volume of the atmosphere
Which one of the following is not a viable particulate?
- (a)
Bacteria
- (b)
Fungi
- (c)
Moulds
- (d)
Smogs
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
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
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
Acid rain is produced by
- (a)
excess production of NH3 by industry and coal gas.
- (b)
excess release of carbon monoxide by incomplete combustion
- (c)
excess formation of CO2 by combustion and animal respiration.
- (d)
excess NO2 and SO2 from burning fossil fuels.
Primary constituents of photochemical smog are
- (a)
CO2 and NO2
- (b)
SO2 and CO
- (c)
NO2 and hydrocarbons
- (d)
hydrocarbons and CFXs
Photochemical smog formed in cities mainly consists of
- (a)
hydrocarbons, SO2 and CO2
- (b)
smoke peroxyacetyl nitrate and SO2
- (c)
hydrocarbon, ozone and SO2
- (d)
ozone, peroxyacetyl nitrate and NO2
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.
Most hazardous metal pollutant of automobile exhaust is
- (a)
Mercury
- (b)
lead
- (c)
cadmium
- (d)
copper
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
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
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
Green chemistry is the development of
- (a)
process favourable for environment
- (b)
process favourable for aquatic life
- (c)
process used for medical treatment of diseases
- (d)
processes used for growth of green plants and vegetables
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