The incorrect statements about classical smog among the following is
Its main components are produced by the action of sunlight on emissions of automobiles and factories
Produced in a cold and humid climate
It contains compounds of reducing nature
It contains smoke, fog, and sulfur dioxide
Which of the following statement(s) is wrong?
Ozone is not responsible for the greenhouse effect
Ozone can oxidize sulphur dioxide present in the atmosphere to sulfur trioxide
Ozone hole is thinning of ozone layer present in the stratosphere
Ozone is produced in the upper stratosphere by the action of UV rays on oxygen
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of
Large number of mosquitoes
Increase in the amount of dissolved oxygen
Decrease in the amount of dissolved oxygen in water
Clogging of gills by mud
The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended upto 10 km from sea level, this layer is
Stratosphere
Troposphere
Mesosphere
Hydrosphere
Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form dioxides of nitrogen because ______.
The reaction is endothermic and requires very high temperature
The reaction can be initiated only in presence of a catalyst
Oxides of nitrogen are unstable
N2 and O2 are unreactive
The pollutants which come directly in the air from sources are called primary pollutants. Primary pollutants are sometimes converted into secondary pollutants. Which of the following belongs to secondary air pollutants?
CO
Hydrocarbon
Peroxyacetyl nitrate
NO
The practice that does not come under green chemistry among the following is-
Making use of soap made of vegetable oils instead of using synthetic detergents.
Using H2O2 for bleaching purposes instead of using chlorine-based bleaching agents.
Using bicycles for traveling small distances instead of using petrol/diesel based vehicles.
Using plastic cans for neatly storing substances.
Which of the following conditions shows the polluted environment?
a. pH of rainwater is 5.9
b. Amount of carbon dioxide in the atmosphere is 0.03%
c. Biochemical oxygen demand 10 ppm
d. Eutrophication
Choose the correct option
Phosphate-containing fertilizers cause water pollution. The addition of such compounds in water bodies causes-
a. Enhanced growth of algae
b. Decrease in the amount of dissolved oxygen in the water
c. Deposition of calcium phosphate
d. Increases fish population
The acids present in acid rain are :
a. Peroxyacetylnitrate
b. H2CO3
c. HNO3
d. H2SO4
Choose the correct option :
The consequences of global warming may be ______.
a. Increase in the average temperature of the earth
b. Melting of Himalayan Glaciers
c. Increased biochemical oxygen demand
Match the terms given in Column I with the compounds given in Column II.
Column I
Column II
A. Acid rain
1. CHCl2-CHF2
B. Photochemical smog
2. CO
C. Combination with hemoglobin
3. Unsaturated hydrocarbons
D. Depletion of the ozone layer
4. SO2
Codes
A B C D
4 2 3 1
1 2 3 4
4 3 2 1
4 1 3 2
Match the pollutant (s) in Column I with effect (s) in Column II.
A. Oxides of Sulphur
1. Red haze in traffic and congested areas
B. Nitrogen dioxide
2. Damage to kidney
C. Lead
3. ‘Blue baby’ syndrome
D. Nitrate in drinking water
4. Respiratory diseases
2 3 4 1
1 4 3 2
4 1 2 3
Among the following gases, the one that is not a greenhouse gas is :
O3
CH4
H2O vapor
Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.
NO2
SO2
Unsaturated hydrocarbon
The compound responsible for depletion of the ozone layer in the upper strata of the atmosphere :-
Ferrocene
Fullerenes
Freons
Polyhalogens
What is the process involved for a good produce in the treatment of bad odour, flies, and recycling of waste?
It should be kept covered.
The recyclable waste should not be dumped in the compost-producing pit.
It should be sent to the industries through vendors for recycling.
All of the above.
The correct statement about domestic waste is -
Phytoplanktons kill the fish because -
Phytoplanktons decrease the BOD level that causes the death of fish.
Phytoplanktons increase the BOD level that causes the death of fish.
Phytoplanktons reduce the amount of dissolved CO2.
None of the above.
In the absence of greenhouse gases -
Life on earth would be impossible.
Average temperature of the earth will decrease drastically.
There will be no effect on Earth.
Both (1) and (2)
Environmental chemistry is best defined as :
Study of chemical processes in nature.
Study of biochemical processes in nature.
Tropospheric pollution arises due to the presence of-
CO gas is more dangerous than CO2 gas because :
CO is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is more stable than the oxygen-haemoglobin complex.
CO is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is less stable than the oxygen-haemoglobin complex.
CO2 is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is more stable than the oxygen-haemoglobin complex.
CO2 is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is less stable than the oxygen-haemoglobin complex.
Gases responsible for greenhouse effect are :
Statues and monuments in India are affected by acid rain because of the formation of :
CaSO4 on the reaction of acid rain with limestone.
CaCO3 on the reaction of acid rain with limestone.
Ca(HCO3)2 on the reaction of acid rain with limestone.
The correct statement(s) regarding photochemical smog is/are:
It occurs in a dry, sunny climate.
It is oxidizing in nature.
It is composed of PAN, acrolein, formaldehyde, nitrogen oxide, and ozone.
The reaction/s involved during the formation of photochemical smog are:
\( \space NO_2(g) \rightarrow NO(g) + \stackrel{\cdot}{O(g)}\)
\( \stackrel{\cdot}{O(g)} + O_2(g) \rightarrow O_3(g)\)
\(\space O_3(g) + NO(g) \rightarrow NO_2(g) + O_2(g)\)
All of the above
Photochemical smog can be controlled by:
The use of catalytic converters in automobiles.
Plantation of plants such as Pinus, Juniparur, etc.
None of the above
The reaction(s) involved in ozone layer depletion in the stratosphere is/are:
Consequence(s) of ozone hole is/are:
They cause death of many phytoplanktons.
Excess exposure may even cause mutation in plants.
It leads to the ageing of skin, cataracts, skin cancer, and sunburns.
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