The incorrect statement about carbon monoxide is-
It reduces the oxygen-carrying ability of blood.
The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.
It is produced due to incomplete combustion.
It forms carboxyhaemoglobin.
Select the correct statement from the following statements?
CO which is a major pollutant resulting from the combustion of fuels in automobiles plays a major role in photochemical smog
Classical smog has an oxidizing character while the photochemical smog is reducing in character
Photochemical smog occurs in day time whereas the classical smog occurs in the morning hours
During formation of smog the level of ozone in the atmosphere goes down
‘White lung cancer’ is caused by :
Asbestos
Silica
Textiles
Paper
Incorrect statement among the following is:
Oxides of sulphur, nitrogen, and carbon are the most widespread air pollutant.
pH of drinking water should be between 6.5 and 8.5.
Concentration of dissolved oxygen below 6 ppm is good for the growth of fish.
Clean water would have a BOD value of less than 5 ppm.
The aromatic compound that is present as particulate among the following is :
Benzene
Toulene
Nitrobenzene
Polycyclic hydrocarbons
A non-greenhouse gas is :
The most abundant hydrocarbon pollutant is :
Chemical that has major part in acid rain is :
HNO3
H2SO4
HCl
H2CO3
When rain is accompanied by a thunderstorm, the pH value of the collected rainwater is :
Dependent upon the amount of dust in the air.
Slightly lower when rainwater is without a thunderstorm.
Slightly higher when the thunderstorm is not there.
Unaffected by the occurrence of thunderstorms.
Which of the following is not one of the prime health risks associated with greaterUV radiations through the atmosphere due to depletion of stratospheric ozone?
Damage to eyes
Which country has the greatest contribution for the hole formation in ozone layer?
Russia
Japan
USA
Germany
The ‘thickness’ of Stratospheric Ozone layer is measured in/on:
Gas that is not a pollutant is :
Carbon monoxide
Nitrogen peroxide
Carbon dioxide
Sulphur dioxide
Air pollution from the leakage of methyl isocyanate gas from the union carbide factory in Bhopal caused a major tragedy on:
Dec. 2, 1984
Dec 15, 1983
Dec.10, 1982
Dec. 4, 1988
The oxygen present today in the atmosphere-
Is a plant product.
Came from ozone.
Was present in the beginning.
Is produced by carbon dioxide.
Photochemical smog formed in congested metropolitan cities mainly consists of :
Ozone, SO2, and hydrocarbons
Ozone, PAN, and NO2
PAN, smoke and SO2
Hydrocarbons, SO2, and CO2
Living in the atmosphere of CO is dangerous because it :
Combines with O2 present inside to form CO2
Reduces organic matter of tissues.
Combines with haemoglobin and makes it incapable to absorb oxygen.
Dilutes the blood.
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be :
Highly polluted.
Poor in dissolved oxygen.
Rich in dissolved oxygen.
Not suitable for aquatic life.
An incorrect statement regarding acid rain is that:
It is formed due to the reaction of SO2
It causes no damage to monuments like the Taj Mahal.
It is harmful to plants.
Its pH is less than 5.6
The chemical that is an excellent ‘green’ solvent as well as a greenhouse gas is:
Methanol
CFCs
Carbon Dioxide
The gas that share 50 % of green house effect responsible for global warming is :
SO2
SO3
CO2
Water vapour
Ozone is a very toxic gas and a strong oxidizing agent. It is still useful for life on earth-
Due to the entrapping of Harmful UV-rays.
Due to the balance in Global warming.
Due to the Entrapping of Harmful X-rays.
Due to the Entrapping of Harmful γ-rays.
Few lakes get covered with algae, a stinking smell comes out and its water becomes unpotable.
The reason for such a condition of the lakes is-
Eutrophication.
Due to excess of oxalate ions.
Due to excess Non-biodegradable waste.
Due to excess photosynthesis.
Mercury, aluminum, lead, copper, DDT, etc. are an example of :
Acid rain occurs due to the oxidation of :
Carbon, sulphur (unsaturated hydrocarbon) and nitrogen.
Ethanol.
Methanol.
Methane.
Biochemical Oxygen Demand (BOD) is-
Amount of oxygen required by bacteria to decompose organic matter in a certain volume of a sample of water.
Amount of CO2 required by bacteria to decompose organic matter in a certain volume of a sample of water.
Amount of O3 required by bacteria to decompose organic matter in a certain volume of a sample of water.
None of the above.
Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere. Even then carbon dioxide is considered to be responsible for green house effect :
Due to an increase in atmospheric temperature.
Due to ozone depletion.
Due to decrease in atmospheric temperature.
Due to an increase in chlorophyll concentration.
A farmer was told that fishes were not fit for human consumption because a large amount of pesticides had accumulated in the tissues of fishes. This happens:
By the transfer of pesticides in the food chain.
By the degradation of pesticides.
By the reaction of pesticides with atmospheric oxygen.
By the reaction of pesticides with atmospheric carbon dioxide.
The best alternative of tetrachloroethane for dry cleaning is-
Liquified CO2 along with suitable detergent.
Liquified CO2 along with suitable oil.
Liquified SO2 along with suitable detergents.
Liquified SO2 along with suitable oil.
Pollution that occurs in the lowest layer of the atmosphere is :
Stratosphere pollution.
Ozone layer pollution.
Air pollution.
Troposphere pollution.
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