Description : Identify the air pollutant in urban areas which irritates eyes and also respiratory tract of human beings. (A) Particulate matter (B) Oxides of nitrogen (C) Surface ozone (D) Carbon monoxide
Last Answer : (C) Surface ozone
Description : Which of the following pollutants is not emitted from the transport sector? (A) Oxides of nitrogen (B) Chlorofluorocarbons (C) Carbon monoxide (D) Poly aromatic hydrocarbons
Last Answer : (B) Chlorofluorocarbons
Description : One of the anthropogenic sources of gaseous pollutants chlorofluorocarbons (CFCs) in air is (A) Cement Industry (B) Fertiliser industry (C) Foam industry (D) Pesticide industry
Last Answer : (C) Foam industry
Description : Which of the following pollutants affects the respiratory tract in humans? (A) Carbon monoxide (B) Nitric oxide (C) Sulphur di-oxide (D) Aerosols
Last Answer : (C) Sulphur di-oxide
Description : Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? (A) Smog & ozone (B) Hydrogen fluoride & nitrogen oxides (C) Sulphur dioxide & spray of weed killers (D) Carbon monoxide
Last Answer : (D) Carbon monoxide
Description : The smog in cities in India mainly consists of (A) Oxides Of sulphur (B) Oxides of nitrogen and unburnt hydrocarbons (C) Carbon monoxide and SPM (D) Oxides of sulphur and ozone
Last Answer : (B) Oxides of nitrogen and unburnt hydrocarbons
Description : Which one of the following is not a matter a global concern in the removal of tropical forests ? (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer ... , moisture content and reflectivity. (D) Their contribution to the biological diversity of the planet.
Last Answer : (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer.
Description : Which of the following pollutants can cause cancer in humans ? (A) Pesticides (B) Mercury (C) Lead (D) Ozone
Last Answer : Answer: A
Description : Which is the source of chlorofluorocarbons? (A) Thermal power plants (B) Automobiles (C) Refrigeration and Air-conditioning (D) Fertilizers
Last Answer : (C) Refrigeration and Air-conditioning
Description : Consider the following statements 1. Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons. 2. Ammonia can be liquefied at ambient temperatures and at low pressures. 3. Chlorofluorocarbons are ... 3 only (b) 2 and 3 only (c) 1, 2 and 3 (d) 3 only
Last Answer : Ans:(a)
Description : A scrubber in the exhaust of a chemical industrial plant removes (a) gases like sulphur dioxide (b) particulate matter of the size 5 micrometer or above (c) gases like ozone and methane (d) particulate matter of the size 2.5 micrometer or less.
Last Answer : a) gases like sulphur dioxide
Description : According to Central Pollution Control board (CPCB). Which particulate size in diameter (in micrometers) of the air pollutants is responsible for grea
Last Answer : According to Central Pollution Control board (CPCB). Which particulate size in diameter (in micrometers) of the air ... . 2.5 or less D. 1.5 or less
Description : According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health? (a) 1.0 or less (b) 5.2 - 2.5 (c) 2.5 or less (d) 1.5 or less
Last Answer : (c) 2.5 or less
Description : Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a ‘particulate’? (A) Dust & mists (B) Smoke & fumes (C) Photochemical smog & soot (D) None of these
Last Answer : (D) None of these
Description : Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere? A. Methane B. Chlorofluorocarbons C. Nitrogen oxides D. Carbon dioxide
Last Answer : ANSWER: C
Description : The depletion in Ozone layer is caused by - (1) Nitrous oxide (2) Carbon dioxide (3) Chlorofluorocarbons (4) Methane
Last Answer : (3) Chlorofluorocarbons Explanation: Chlorofluorocarbons (CFCs), also known as Freon, cause the breakdown of the ozone layer that protects the earth from the sun's ultraviolet (UV) radiation. In the ... depletion in the upper atmosphere, CFCs have been phased out under the Montreal Protocol of 1987.
Description : Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere? (1) Chlorofluorocarbons (2) Nitrous oxide (3) Sulphur dioxide (4) Carbon dioxide
Last Answer : (1) Chlorofluorocarbons Explanation: Chlorofluorocarbon contributes to ozone depletion in the upper atmosphere. It is an organic compound that contains only carbon, chlorine, and fluorine, produced as a ... methane, ethane, propane. Its manufacture has been phased out under the Montreal Protocol.
Description : Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere? A. Carbon dioxide B. Chlorofluorocarbons (Answer) C. Nitrogen oxides D. Methane
Last Answer : B. Chlorofluorocarbons (Answer)
Description : The depletion in Ozone layer is caused by ___________ . (1) Nitrous oxide (2) Carbon dioxide (3) Chlorofluorocarbons (4) Methane
Last Answer : Chlorofluorocarbons
Description : Which of the following is the most major constituents of air pollutants? (A) Oxides of sulphur (B) Oxides of nitrogen (C) Carbon monoxide (D) Hydrogen sulphide
Last Answer : (A) Oxides of sulphur
Description : Electrostatic precipitators are employed to remove particulate pollutants of the size of
Last Answer : Electrostatic precipitators are employed to remove particulate pollutants of the size of A. `5-20 mum ` B. `20 - ... mum` and larger D. `0.5-5.0 mum`.
Description : Fine organic or inorganic particles suspended in air is called --------? A. particulate pollutant B. gaseous pollutant C. aerosol (Answer) D. none of these
Last Answer : C. aerosol (Answer)
Description : Among the following air pollutants which directly impacts human health as well as climate ? (A) Soot (B) Sulphur dioxide (C) Oxides of nitrogen (D) Chlorofluoro carbons
Last Answer : (A) Soot
Description : What are the major pollutants of cigarette smoke? (1) Carbon monoxide and dioxin (2) Carbon monoxide and nicotine (3) Carbon monoxide and benzene (4) Dioxin and benzene
Last Answer : (2) Carbon monoxide and nicotine Explanation: Particulate matter consists of millions of tiny particles of diverse chemical composition. Particulate matter from tobacco smoke includes many particles in the size ... smoke and can enter deep into the lung where they can cause serious health problems.
Last Answer : Carbon monoxide and nicotine
Description : The most serious air pollutant causing health hazard is – (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide
Last Answer : (1) Sulphur dioxide Explanation: Sulphur dioxide (SO2) is considered as the most serious single air pollutant causing health hazard, obstructing breathing. It always leads to airways inflammation, ... , pulmonary oedema, heart failure and circulatory collapse. It is also responsible for acid rain.
Description : The major harmful gas emitted by automobile vehicle which causes air pollution is – (1) Carbon Monoxide (2) Methane (3) Carbon dioxide (4) Ozone gas
Last Answer : (1) Carbon Monoxide Explanation: Carbon monoxide is the major harmful gas emitted by the automobile vehicles which causes air pollution. Carbon monoxide (CO) - A product of incomplete combustion, ... overexposure (carbon monoxide poisoning) may be fatal. Carbon Monoxide poisoning is a major killer.
Description : The major harmful gas emitted by automobile vehicles which causes air pollution is – (1) Carbon Monoxide (2) Methane (3) Carbon dioxide (4) Ozone gas
Description : Chief air pollutant which is likely to deplete ozone layer is a) Sulphur dioxide b) Carbon dioxide c) Carbon monoxide d) Nitrogen oxides and Fluorocarbons.
Last Answer : d) Nitrogen oxides and Fluorocarbons
Description : The most serious air pollutant causing health hazard is (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide
Last Answer : Sulphur dioxide
Description : The major harmful gas emitted by automobile vehicles which causes air pollution is (1) Carbon Monoxide (2) Methane (3) Carbon dioxide (4) Ozone gas
Last Answer : Carbon Monoxide
Description : The major harmful gas emitted by automobile vehicle which causes air pollution is (1) Carbon Monoxide (2) Methane (3) Carbon dioxide (4) Ozone gas
Last Answer : Carbon dioxide
Description : Ozone-hole in the atmosphere is largely caused by the presence of – (1) Oxygen (2) Hydrogen (3) Chlorofluorocarbons (4) Radio-active waste
Last Answer : (3) Chlorofluorocarbons Explanation: Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. It is calculated that a ... about a century, destroying up to one hundred thousand ozone molecules during that time.
Description : The depletion of Ozone layer is mainly due to – (1) Volcanic eruptions (2) Aviation fuels (3) Radioactive rays (4) Chlorofluorocarbons
Last Answer : (4) Chlorofluorocarbons Explanation: Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. Chloroiluorocarbon (CFC) is ... , chlorine, and fluorine, produced as a volatile derivative of methane and ethane.
Description : Which one among the following is responsible for formation of "Ozone Holes" in the atmosphere? (1) Benzopyrene (2) Hydrocarbons (3) Chlorofluorocarbons (4) UV radiation
Last Answer : (3) Chlorofluorocarbons Explanation: Chlorofluorocarbon (CFCs), commonly known by the DuPont brand name Freon, are considered as one of the ozonedepleting substances.
Description : Ozone hole is caused by a) Acetylene b) Ethylene c) Chlorofluorocarbons d) Methane.
Last Answer : c) Chlorofluorocarbons
Description : Which element in chlorofluorocarbons (CFCs) is responsible for destroying the Earth's ozone layer? w) oxygen x) fluorine y) chlorine z) bromine
Last Answer : ANSWER: Y -- CHLORINE
Description : The depletion of Ozone layer is mainly due to (1) Volcanic eruptions (2) Aviation fuels (3) Radioactive rays (4) Chlorofluorocarbons
Description : How effective are air scrubbers in removing particulate matter from the air?
Last Answer : answer:Particulate matter from exhaust gases emitted by power plant boilers in particular (if you'll pardon the pun) is primarily removed via the use of electrostatic precipitators or by baghouses. A ... its entire traverse as the gas loses heat and speed and encounters obstacles in the flow.
Description : As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3 .(μg-microgram) (A) 10 (B) 90 (C) 800 (D) 750
Last Answer : (B) 90
Description : The maximum emission of pollutants from fuel sources in India is caused by : (A) Coal (B) Firewood (C) Refuse burning (D) Vegetable waste product
Last Answer : Answer: B As many as 115,000 people die in India each year from coal-fired power plant po llution, costing the country about $4.6 billion, according to a groundbreaking new study released ... generation in India and its usage is continuously increasing to meet the energy demands of the country.
Description : Which one of the following is an indication of the quality of a research journal? (A) Impact factor (B) h-index (C) g-index (D) i10-index
Last Answer : (A) Impact factor
Description : Biomagnification means increase in the (A) concentration of pollutants in living organisms (B) number of species (C) size of living organisms (D) biomass
Last Answer : (A) concentration of pollutants in living organisms
Description : Which of the following is a source of emissions leading to the eventual formation of surface ozone as a pollutant? (A) Transport sector (B) Refrigeration and Air conditioning (C) Wetlands (D) Fertilizers
Last Answer : (A) Transport sector
Description : Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion ... rate? (A) CO (B) SO2 (C) NOx (D) CFC (chloro fluoro carbons)
Last Answer : (A) CO
Description : Certain substances are classified as water pollutants, others as air pollutants and still others as land pollutants. Which of the following pollutes all three parts of our environment? w) fluorocarbons x) smog y) acid rain z) ozone
Last Answer : ANSWER: Y -- ACID RAIN
Description : The most important quality of a good teacher is (A) Sound knowledge of subject matter (B) Good communication skills (C) Concern for students’ welfare (D) Effective leadership qualities
Last Answer : (A) Sound knowledge of subject matter
Description : (1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, ... violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3
Last Answer : Water is not effective in extinguishing a fire caused by petrol because - (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn