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 : 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 : 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 : Which of the following compounds has been suggested as causing depletion of the ozone layer in the upper stratosphere? (a) CH4 (b) CCl2F2 (c) CF4 (d) CH2Cl2
Last Answer : CCl2F2
Description : Ozone depletion in the atmosphere is mainly caused by - (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon
Last Answer : (4) chlorofluorocarbon Explanation: A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ethane. They contribute to ozone depletion in the upper atmosphere.
Description : Ozone depletion in the atmosphere is mainly caused by (1) sulphur dioxide (2) nitrogen dioxide (3) hydrogen sulphide (4) chlorofluorocarbon
Last Answer : chlorofluorocarbon
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
Description : Which of the following is produced during the formation of photochemical smog? (1) Nitrogen Oxides (2) Hydrocarbons (3) Methane (4) Ozone
Last Answer : (4) Ozone Explanation: Ozone is produced during the formation of photochemical smog. Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities.
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 : 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 : 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 : 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 : Oxides of nitrogen released during lightning is an example of
Last Answer : biodegradable pollutant.
Description : Give reason: Oxides of nitrogen released during lightning is not pollutant but oxides released by industries and automobiles are pollutant.
Last Answer : Human interference causes the same substance to become a pollutant.
Description : Which is correct about statements X and Y statement X. DDT shows biological magnification Statement Y : UV radiations causes ozone depletion .
Last Answer : Which is correct about statements X and Y statement X. DDT shows biological magnification Statement Y : UV ... D. X is not correct, Y is correct.
Description : Depletion of ozone layer in the atmosphere causes cancer of a) skin b)stomach c)blood d)lungs
Last Answer : a) skin
Description : Depletion of ozone is mainly due to
Last Answer : Depletion of ozone is mainly due to A. `CO_(2)` B. CFC C. `SO_(2)` D. `CH_(4)`.
Description : The depletion of ozone layer is due to:
Last Answer : The depletion of ozone layer is due to: A. Oxides of nitrogen B. Oxides of carbon C. Oxides of sulphur D. None of the above
Description : Mirage is due to (a) Unequal heating of different parts of the atmosphere (b) Magnetic disturbances in the atmosphere (c) Depletion of ozone layer in the atmosphere (d) Equal heating of different parts of the atmosphere
Last Answer : Ans:(a)
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 : The depletion of ozone layer is due to - (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane
Last Answer : (1) chloro fluoro carbon Explanation: A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ... R-4104 by the Montreal Protocol because they contribute to ozone depletion in the upper atmosphere.
Description : Ultraviolet radiation striking the earth is due to the depletion of – (1) carbon monoxide (2) carbon dioxide (3) ozone (4) oxygen
Last Answer : (3) ozone Explanation: Ozone is a powerful oxidant (far more so than dioxygen) and has many industrial and consumer applications related to oxidation. This same high oxidizing potential, however, ... 100 parts per billion. This makes ozone a potent respiratory hazard and pollutant near ground level.
Description : Why normal rain is slightly acidic? A. due to presence of dust in air B. carbon dioxide and water in clouds react to form carbonic acid (Answer) C. Ozone depletion D. All of these
Last Answer : B. carbon dioxide and water in clouds react to form carbonic acid (Answer)
Description : Depletion of ozone Layer is mainly due to
Last Answer : Chlorofluoro carbon
Description : 1. Bird population is seen to decrease due to thinning of egg shells which is caused by : a) Eutrophication b) Biomagnification c) Greenhouse Effect d) Ozone depletion
Last Answer : d) Ozone depletion
Description : The depletion of Ozone layer is mainly due to (1) Volcanic eruptions (2) Aviation fuels (3) Radioactive rays (4) Chlorofluorocarbons
Last Answer : Chlorofluorocarbons
Description : The depletion of ozone layer is due to (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane
Last Answer : chloro fluoro carbon
Description : Ultraviolet radiation striking the earth is due to the depletion of (1) carbon monoxide (2) carbon dioxide (3) ozone (4) oxygen
Last Answer : ozone
Description : Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog? (A) Nitrogen oxides (B) Hydrocarbons (C) Both 'a' & 'b' (D) Carbon monoxide
Last Answer : (C) Both 'a' & 'b'
Description : Acid rain is caused due to pollution of atmosphere by – (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorus (4) None of these
Last Answer : (2) oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of Sulpfur Dioxide (SO2) and Nitrogen Oxide (NOx), which react with the water molecules in the atmosphere to produce acids.
Description : Global warming is mainly due to accumulation of – (1) Oxides of nitrogen (2) Oxides of sulphur (3) Carbon dioxide (4) Carbon monoxide
Last Answer : (3) Carbon dioxide Explanation: Global Warming refers to average increase in the earth's temperature due to increase in pollution which results in greenhouse effect which in turn leads to climate ... dioxide accumulate into the atmosphere and trap heat that would normally exit into the outer space.
Description : The dominant source of pollution due to oxides of nitrogen (NOx) in urban areas is (A) Road trAns:port (B) Commercial Sector (C) Energy use in industry (D) Power plants
Last Answer : (B) Commercial Sector
Description : Acid rain is caused due to pollution of atmosphere by (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorous (4) None of these
Last Answer : oxides of nitrogen and sulphur
Description : Global warming is mainly due to accumulation of (1) Oxides of nitrogen (2) Oxides of sulphur (3) Carbon dioxide (4) Carbon monoxide
Last Answer : Carbon dioxide
Description : Why is it good to have ozone in the Stratosphere and bad to have ozone in the lower Troposphere?
Last Answer : reduced absorption of ultraviolet radiation
Description : The area of the stratosphere that has a great amount of ozone gas is the?
Last Answer : Ozone layer has most of the ozone. It is present as pool ofozone molecules.
Description : The protective ozone layer of stratosphere itself requires protection from indiscriminate use of :
Last Answer : The protective ozone layer of stratosphere itself requires protection from indiscriminate use of : A. ... wastes D. Baloons and turbo-prop aeroplanes.
Description : Ozone present in stratosphere filters out
Last Answer : Ozone present in stratosphere filters out A. UV-A B. UV-B C. UV-C D. Both B and C
Description : Ozone present in stratosphere comes from
Last Answer : Ozone present in stratosphere comes from A. Photosynthesis activity from earth B. Reaction between ... oxygen molecules D. Microbial decay on earth.
Description : Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Most of the ozone in the atmosphere is concentrated in the _____ A. Mesosphere B. Troposphere C. Stratosphere D. Ionosphere
Description : Which layer of the earth's atmosphere contains the ozone layer? (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere
Last Answer : (4) Stratosphere Explanation: The ozone layer is a region of Earth's stratosphere. It is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometres (12 to 19 mi) ... nm to 315 nm wavelength), which other-wise would be harmful to exposed life forms on the earth.
Description : Most of the ozone in the earth's atmosphere is found in the: (1) Troposphere (2) Stratosphere (3) Mesophere (4) Thermosphere
Last Answer : (2) Stratosphere Explanation: Most ozone (about 90%) resides in a layer that begins between 10 and 17 kilometers above the Earth's surface and extends up to about 50 kilometers. This region of ... is called the stratosphere. The ozone layer absorbs most of the Sun's ultraviolet (UV) radiation.
Description : Ultraviolet radiation in the stratosphere is absorbed by – (1) SO2 (2) Ozone (3) Oxygen (4) Argon
Last Answer : (2) Ozone Explanation: The ozone layer of Earth's stratosphere absorbs most of the Sun's ultraviolet radiation. It absorbs 97 to 99 percent of the Sun's medium-frequency ultravi-olet light ( ... 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms on the earth.
Description : Ozone layer is present in - (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Exosphere
Last Answer : (3) Stratosphere Explanation: The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres above Earth, though the thickness varies seasonally and ... in general thicker during the spring and thinner during the autumn in the northern hemisphere.
Description : Which atmospheric layer contains ozone layer? (1) Genosphere (2) Zonosphere (3) Stratosphere (4) Ionosphere
Last Answer : (3) Stratosphere Explanation: The ozone layer is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radioation.
Description : Most of the ozone in the atmosphere is concentrated in the------? A. Mesosphere B. Troposphere C. Stratosphere (Answer) D. Ionosphere
Last Answer : C. Stratosphere (Answer)
Description : Most of the ozone in the atmosphere is concentrated in the -------? A. Mesosphere B. Troposphere C. Stratosphere (Answer) D. ionosphere
Description : Pick out the wrong statement (A) The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone (B) Mesosphere is characterised by very low atmospheric ... radio waves used in the long distance radio communication are reflected back to earth by stratosphere
Last Answer : (D) The radio waves used in the long distance radio communication are reflected back to earth by stratosphere
Description : The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU). (A) 20 (B) 230 (C) 750 (D) 1500
Last Answer : (B) 230