AIR POLLUTION MCQs

MCQs based questions and answers on AIR POLLUTION.

Which pollutant results from roasting and heating processes?

  1. Dust
  2. Smoke
  3. Metal fumes
  4. All of these

Question Answer: All of these


Which pollutants results from chemicals, petroleum and paper industries?

  1. SOx
  2. Hydrocarbons
  3. NOx
  4. All of these

Question Answer: All of these


Which process is used for the removal of particulates?

  1. Wet removal by precipitation
  2. Diffusion and impaction
  3. Sedimentation
  4. All of these

Question Answer: All of these


Which environmental problem could lead to a rise in sea level?

  1. Acid rain
  2. Cutting down the trees in the rain forests
  3. Global warming
  4. Damage to the ozone layer

Question Answer: Global warming


Which gas is not a greenhouse gas?

  1. O3
  2. CO
  3. CH4
  4. H2O vapors

Question Answer: CO


Environmental pollution refers to which of the following?

  1. Release of toxic/undesirable materials in environment
  2. Dissipation of energy
  3. Peeling of top soil
  4. None of these

Question Answer: Release of toxic/undesirable materials in environment


Which of the following is the agricultural field that produces 6 maximum methane gas into atmosphere?

  1. Wheat field
  2. Groundnut field
  3. Cotton field
  4. Paddy field

Question Answer: Paddy field


Photochemical smog is caused primarily by which of the following?

  1. CO
  2. NO2
  3. O3
  4. CO₂

Question Answer: NO2


Photochemical smog consists of excessive amount of X in addition to aldehydes. Ketones. PAN Etc. X is

  1. Methane
  2. Carbon monoxide
  3. Ozone
  4. Carbon dioxide

Question Answer: Ozone


Which is/are related to effects of photochemical smog?

  1. Birth defects
  2. Aggravation of asthma
  3. Coughing and irritation of eyes
  4. All of these

Question Answer: All of these


Which statement is/are true with regard to effects of particulate matter?

  1. With ozone act as allergens
  2. Affect the lungs of adults
  3. Aggravation of asthma
  4. All of these

Question Answer: All of these


Which methods are involved with regard to control of particulate matter?

  1. Electrostatic precipitators
  2. Wet scrubbers
  3. Cyclonic separators
  4. All of these

Question Answer: All of these


Ozone hole refers to which of the following?

  1. Decrease of thickness of ozone in troposphere
  2. Decrease in thickness of ozone layer in stratosphere
  3. Black hole
  4. Increase concentration of ozone in the atmosphere

Question Answer: Decrease in thickness of ozone layer in stratosphere


Photochemical smog is related to which of the following?

  1. Air pollution
  2. Water pollution
  3. Land pollution
  4. Soil pollution

Question Answer: Land pollution


What are the sources of organic particulate matter?

  1. Emission from vegetation
  2. Combustion of fossil fuels
  3. Emission from automobiles
  4. All of these

Question Answer: All of these


Which of the following is the residue which is formed on combustion of fuel in power plants?

  1. Dust
  2. Soot
  3. Smoke
  4. Activated carbon

Question Answer: Soot


Which of the following is the phenomenon that the earth magnetic field has a strong influence on the ions in the upper atmosphere?

  1. Magnetic effect
  2. Van Allen belts
  3. Electric effect
  4. Electrical thundering

Question Answer: Van Allen belts


Which substance act as 18 photochemical oxidant?

  1. NOx
  2. Peroxyacetyl nitrate
  3. Ozone
  4. All of these

Question Answer: All of these


Which pollutant is generated from combustion of fuel?

A Smoke

  1. SO2
  2. CO2
  3. All of these

Question Answer: All of these


Which free radicals is existing in the atmosphere?

  1. CH3
  2. HOO
  3. CH3COO
  4. HCO

Question Answer: CH3COO


Commercial incinerators produce

  1. NOx
  2. CO
  3. Smoke
  4. All of these

Question Answer: All of these


SO is generated from which industry?

  1. Drying and packing
  2. Paper and pulp
  3. Pulp
  4. Paper

Question Answer: Paper and pulp


Which gas defends us form harmful effect of UV radiation?

  1. O3
  2. NO2
  3. CO
  4. SO₂

Question Answer: O3


Ozone filters out radiation below?

  1. 1000 Å
  2. 2000 Å
  3. 4000 Å
  4. 3000 Å

Question Answer: 3000 Å


Chloroflororocarbons (CFC) are widely used as coolants in

  1. Air conditioners
  2. Aerosol propellants
  3. Clearing solvents
  4. All of these

Question Answer: All of these


The reduction in ozone layer would lead to

  1. Temperature changes
  2. Increase in UV radiation on earth
  3. Cancer
  4. All of these

Question Answer: All of these


What products are formed when ozone absorbs UV light (308 nm)?

  1. O₂+ + e
  2. O₂ + O
  3. O+ + e
  4. O + O

Question Answer: O₂ + O


What is the maximum concentration of ozone in the stratosphere at an altitude of 25-30 km?

  1. 10 ppm
  2. 5 ppm
  3. 15 ppm
  4. 20 ppm

Question Answer: 10 ppm


Which pollutant is not primary pollutant?

  1. Ash
  2. SO3
  3. Fumes
  4. Smoke

Question Answer: SO3


Which pollutant is not secondary pollutant?

  1. SO2
  2. NO2
  3. SO3
  4. Peroxyacetyl nitrate (PAN)

Question Answer: SO2


Which substance is normally not considered an air pollutant?

  1. CO
  2. NO₂
  3. SO₂
  4. CO₂

Question Answer: CO₂


Particulate from soil and mineral primarily contains

  1. Sodium compounds
  2. Calcium, aluminum and silicon compounds
  3. Aluminum compounds
  4. Calcium compounds

Question Answer: Calcium, aluminum and silicon compounds


The most harmful components of incomplete combustion are normally grouped as particulate polycyclic organic matter (PPOM). These materials are derivatives of

  1. Benzene
  2. Benz-a-pyrene
  3. Anthracene
  4. Naphthalene

Question Answer: Benz-a-pyrene


Ozone can react with Which chemical species?

  1. NO
  2. O
  3. HO Cons
  4. All of these

Question Answer: All of these


Which statement is not related with SO,?

  1. It is a colorless gas
  2. It is reduced slowly in clear air to H₂S
  3. It is moderately soluble in water
  4. It has sharp and pungent odor

Question Answer: It is reduced slowly in clear air to H₂S


Which gas forms weakly acidic sulphurous acid (H,SO)?

  1. SO₂
  2. SO3
  3. NO₂
  4. N₂O

Question Answer: SO3


Which oxide is formed in appreciable quantity in the atmosphere?

  1. NO2
  2. NO
  3. N2O
  4. All of these

Question Answer: All of these


Which statement is not relevant with nitrous oxide?

  1. It is a colorless and odorless gas
  2. It has high reactivity in the lower atmosphere
  3. It is existing in the atmosphere in higher concentration
  4. It is non-toxic gas

Question Answer: It has high reactivity in the lower atmosphere


Which of the following are Aerosols of natural origin with diameter less than 0.2 p?

  1. Beta-particles
  2. Gamma particles
  3. Alpha –particles
  4. Aitken particles

Question Answer: Aitken particles


Which substance acts as gaseous pollutant?

  1. SO2
  2. NO2
  3. NO
  4. All of these

Question Answer: All of these


Which statement is not related with nitric oxide?

  1. It is a colorless and odorless gas
  2. It is produced largely by fuel combustion
  3. It is a brown pungent gas
  4. It absorbs sun light and starts photochemical reactions

Question Answer: It is a brown pungent gas


Which statement is no regarding nitrogen dioxide?

  1. It is produced by the oxidation of NO
  2. Its small concentration has been detected in lower stratosphere
  3. It is major pollutant
  4. It does not absorb sun light

Question Answer: It does not absorb sun light


Which statement is related with CO?

  1. It constitutes the single largest pollutant in urban atmosphere
  2. It is a colorless and tasteless gas matter
  3. It has less affinity towards hemoglobin
  4. It has a boiling point of 192°C

Question Answer: It has less affinity towards hemoglobin


Which statement is not true regarding hydrocarbons?

  1. They are gaseous and liquids
  2. They can be saturated or unsaturated
  3. They in air by themselves alone cause harmful effects
  4. They form photochemical oxidants

Question Answer: They in air by themselves alone cause harmful effects


Which pollutant results from combustion of fossil fuels?

  1. SO2
  2. NOx
  3. CO
  4. All of these

Question Answer: All of these



Which process is used for the removal of gases?

  1. Absorption
  2. Chemical reaction in the atmosphere
  3. Precipitation
  4. All of these

Question Answer: All of these


Which health effect is caused by lead?

  1. Neurotoxicity
  2. Cancer
  3. Hypertension
  4. Kidney damage.

Question Answer: Neurotoxicity

Which health effect is caused by mercury?

  1. Nerve damage
  2. Kidney damage
  3. Brain damage
  4. All of these

Question Answer: All of these


Which health effect is caused by cadmium?

  1. Kidney damage
  2. Cardiovascular problem
  3. Hypertension
  4. All of these

Question Answer: All of these


Which is existing in photochemical smog?

  1. Aldehydes
  2. NOx
  3. PAN
  4. All of these

Question Answer: All of these



Which of the following is the most hazardous metal pollutant of automobile exhaust?

  1. Lead
  2. Tin
  3. Cadmium
  4. Mercury

Question Answer: Lead


Which plays an important role in depletion of ozone layer?

  1. Oxides of sulphur
  2. Oxides of carbon
  3. Oxides of nitrogen
  4. None of these

Question Answer: Oxides of nitrogen



When/Where Photochemical smog is normally formed?

  1. In early hours of winters
  2. When intensity of solar radiations is very low
  3. Around mid-day in summer months
  4. When concentration of particulate matter is very low

Question Answer: Around mid-day in summer months


Which reacts with hemoglobin of blood and produce toxic effect?

  1. Carbon dioxide
  2. Nitrogen oxide
  3. Oxygen
  4. Carbon monoxide

Question Answer: Carbon monoxide


Which is major sink for carbon monoxide?

  1. Soil
  2. Water
  3. Animal respiration
  4. Salts dissolved in ocean water

Question Answer: Soil


U.V. radiation from the sun causes a reaction in the atmosphere that leads to production of

  1. Nitrogen oxides
  2. Ozone
  3. Sulphur dioxide
  4. Carbon monoxide

Question Answer: Ozone


Which pose threat to Historical monument Taj Mahal?

  1. Floods in Yamuna river
  2. Temperature mediated spoilage of
  3. Weathering of marble
  4. Air pollutants from Mathura refinery marble

Question Answer: Weathering of marble


Which is not a pollutant from the exhaust of motor?

  1. Hydrocarbons
  2. Carbon monoxide
  3. Fly ash
  4. NOx

Question Answer: Fly ash


Acid rain is caused due to increase in the concentration of in the atmosphere

  1. Ozone and dust
  2. SO₂ and NO₂
  3. SO3 and CO
  4. CO₂ and CO

Question Answer: SO₂ and NO₂


Maximum thinning of ozone (bole) has spread over which of the following?

  1. Antarctica
  2. America
  3. Europe
  4. Australia

Question Answer: Antarctica

Atmosphere of metropolitan cities is mostly- polluted by which of the following?

  1. Household waste
  2. Pesticide residue
  3. Automobile exhausts
  4. Radio-active fall out

Question Answer: Automobile exhausts


Green chemistry refers to:

  1. Chemistry of plants
  2. Chemistry of green pigments
  3. Development of chemical products and processes less harmful to humans
  4. Chemistry of greenhouse effect

Question Answer: Development of chemical products and processes less harmful to humans


What is Result of ozone hole?

  1. Acid rain
  2. Greater exposure of earth to U.V. rays
  3. Increased amount of CO2
  4. Global warming

Question Answer: Greater exposure of earth to U.V. rays


Air pollution is not caused by  which of the following?

  1. Pollen grains
  2. Automobiles
  3. Industries
  4. Hydroelectric power

Question Answer: Hydroelectric power



Which is atmosphere pollutant ?

  1. CO2
  2. CO
  3. O2
  4. N2

Question Answer: O2


Ozone layer of upper atmosphere is being destroyed by

  1. Photochemical oxidants/O2 and CO₂
  2. SO2
  3. Chlorofluorocarbons
  4. Smog

Question Answer: Chlorofluorocarbons


Ozone depletion in stratosphere will result in which of the following?

  1. Increased incidence of skin cancer
  2. Forest fires
  3. Global warming
  4. Acid rain

Question Answer: Increased incidence of skin cancer


Which one of the following is a source of energy but does not cause pollution?

  1. Gasoline
  2. Solar energy
  3. Fossil fuels
  4. Nuclear power plant

Question Answer: Solar energy


Which substance is not existing in acid rain?

  1. Sulphuric acid
  2. Nitric acid
  3. Sulphurous acid
  4. Acetic acid

Question Answer: Acetic acid


Which is not a chemical pollutant?

  1. Solid waste
  2. insecticides
  3. Norse
  4. Liquid waste

Question Answer: Norse


Earth is protected from UV radiations by which of the following?

  1. Carbon dioxide layer
  2. Oxygen layer
  3. Troposphere
  4. Ozone layer

Question Answer: Ozone layer

Which responsible for depletion of ozone layer in upper strata of the atmosphere?

  1. Freons
  2. Ferrocene
  3. Fullerenes
  4. Polyhalogens

Question Answer: Freons


The smog is essentially caused by the presence of which of the following?

  1. O3 and N2
  2. O2 and O3
  3. Oxides of sulphur and nitrogen
  4. O2 and N2

Question Answer: O2 and O3


Ozone acts as ______.

  1. Saver
  2. Pollutant
  3. Oxidant
  4. All of these

Question Answer: Oxidant


In Which layer of atmosphere there is more thickness of ozone layer?

  1. Stratosphere
  2. Troposphere
  3. Mesosphere
  4. Photosphere

Question Answer: Stratosphere

Which air pollutants more dangerous for ozone layer?

  1. Halogens
  2. CO2
  3. Oxides of nitrogen
  4. CO

Question Answer: Oxides of nitrogen


Which the following of blood and reacts produce with toxic effect.

  1. Carbon dioxide
  2. Carbon sub oxide
  3. Oxygen
  4. Carbon monoxide

Question Answer: Carbon monoxide


Carbon dioxide content in atmosphere is:

  1. 0.034 %
  2. 0.0034%
  3. 0.34%
  4. 3.4 %

Question Answer: 0.034 %

Which of the following is secondary pollutant?

  1. PAN
  2. CO₂
  3. CO
  4. Aerosol

Question Answer: PAN


DDT is

  1. Biodegradable pollutant
  2. No degradable contaminant
  3. Air pollutant
  4. An antibiotic

Question Answer: No degradable contaminant


Peeling of ozone umbrella is due to which of the following?

  1. CO2
  2. PAN
  3. CFCs
  4. Coal burning

Question Answer: CFCs


Ozone layer of stratosphere needed protection from indiscriminate use of

  1. Aerosols and high flying jets
  2. Fungicides, insecticides, bactericides etc.
  3. Atomic explosions and industrial wastes
  4. Weather balloons.

Question Answer: Aerosols and high flying jets


Which statement is/are true regarding Aitken particles?

  1. Their size is in the range of 0.1-0.15 μ
  2. These particles originate from vegetation
  3. They are colloidal in nature
  4. All of these

Question Answer: All of these


Which statement is/are true regarding particulate matter?

  1. They are responsible for cloud and fog formation
  2. They determine the heat balance of the earth through reflection of radiation
  3. They are responsible for several catalytic reactions in the atmosphere
  4. All of these

Question Answer: All of these


More Environmental Chemistry MCQs

  1. AIR POLLUTION MCQs
  2. MCQs on Water Pollution and Noise Pollution
  3. Environmental Chemistry MCQs
  4. CHEMISTRY MCQs From all subjects of  Chemistry
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