Description : Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of stratospheric ozone layer has resulted in increase in ult
Last Answer : Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of ... true but reason is wrong D. Both are wrong
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 : Depletion of ozone layer in the outer atmosphere may cause A. Lung cancer B. Skin cancer C. Bronchitis D. Heart disorder
Last Answer : ANS: B
Description : Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of (A) CO2 (B) SO2 (C) Hydrocarbons (D) CFC (chloro fluoro carbon)
Last Answer : (D) CFC (chloro fluoro carbon)
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 : CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone. (A) 10 2 (B) 10 5 (C) 10 9 (D) 10 15
Last Answer : (B) 10 5
Description : Depletion of ozone layer in the atmosphere causes cancer of a) skin b)stomach c)blood d)lungs
Last Answer : a) skin
Description : Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ? (1) Nitrous oxide (2) Carbon dioxide (3) Chlorofluorocarbon (4) Sulphur dioxide
Last Answer : Chlorofluorocarbon
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 : 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 : Depletion of ozone Layer is mainly due to
Last Answer : Chlorofluoro carbon
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 : 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 : Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful (1) solar ultraviolet radiation (2) solar infrared radiation (3) CO2 in the air (4) SO2 in the air
Last Answer : (1) solar ultraviolet radiation Explanation: Ozone layer serves as a protective shield against harmful solar ultraviolet radiation.
Last Answer : solar ultraviolet radiation
Description : The depletion of ozone layer is caused by?
Last Answer : Chlorofluorocarbon (CFC)
Description : Effect of ozone layer depletion?
Last Answer : It causes harmful activities like skin cancer, cataracts. Mainlychildren are worst affected. It is also harmful for eyes.
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 : Dangerous gas for depletion of ozone layer is: (A)Ethane (B) Methane (C)CFC (D) Carbon-dioxide
Last Answer : (C)CFC
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 : This cause the depletion of ozone layer by decomposing ozone to oxygen . a) CFC b)UV radiations c)CO2 d)O2
Last Answer : b)UV radiations
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 : The depletion in Ozone layer is caused by ___________ . (1) Nitrous oxide (2) Carbon dioxide (3) Chlorofluorocarbons (4) Methane
Description : Ozone layer is formed due to reactions of : (1) oxygen and ultraviolet rays (2) carbon dioxide and layers of atmosphere (3) cosmic rays and layers of atmosphere (4) infrared rays and ultraviolet rays
Last Answer : (1) oxygen and ultraviolet rays Explanation: Ozone in the Earth's stratosphere is created by ultraviolet light striking ordinary oxygen molecules containing two oxygen atoms (O2), splitting them into ... (atomic oxygen). The atomic oxygen then combines with unbroken O2 to create ozone (O3).
Description : The progressive warming up of the earth's surface is mainly due to the (A) Automobile exhau (B) Blanketing effect of CO2 in the atmosphere (C) De-forestation (D) Thickening of ozone layer
Last Answer : (B) Blanketing effect of CO2 in the atmosphere
Last Answer : oxygen and ultraviolet rays
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 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 : Nitrogen oxides released in the stratosphere causes ozone depletion due to
Last Answer : Nitrogen oxides released in the stratosphere causes ozone depletion due to A. catalysing conversion of ... . reacting with ozone D. All the above
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 : 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 : 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 : 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
Last Answer : ANSWER: C
Description : What refers to the heating of the earth’s atmosphere not caused by direct sunlight but by infrared light radiated by the surface and absorbed mainly by atmospheric carbon dioxide? A. Greenhouse effect B. Global warming C. Thermal rise effect D. Ozone effect
Last Answer : Greenhouse effect
Description : Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratosphe
Last Answer : Which of the following is not one of the prime health risks associated with greater UV radiation ... C. Reduced Immune System D. Damage to eyes
Description : The mirage is seen in a hot desert because of (a) The density of the layer of air increases with altitude (b) The density of the layer of air decreases with altitude (c) The reflection of light from the layers of sand (d) The total internal reflection from sand
Last Answer : Ans:(a)
Description : Indicate the false statement. A. Industrial noise is usually of the impulse type B. Static is caused by lightning discharges in thunderstorms and other natural electric disturbances occurring in the ... another source of man-made noise D. Flourescent lights are another source of man-made noise
Last Answer : C. Distant stars are another source of man-made noise
Description : What is the name of the layer of the Earth's atmosphere that contains the ozone layer?
Last Answer : A: The stratosphere.
Description : What prevents the earth’s atmosphere from drifting away into space? A. Gravity (Answer) B. Ozone layer C. Troposphere D. Ecosystem
Last Answer : A. Gravity (Answer)
Description : Ozone layer prevents ------- radiation from entering the atmosphere? A. Infra-red B. Ultraviolet (Answer) C. X-rays
Last Answer : B. Ultraviolet (Answer)
Description : How does CFC gas damage the ozone layer in the atmosphere ?
Last Answer : When CFC gas is present in the stratosphere of the atmosphere, the sun's ultraviolet rays break it down and release chlorine. This free chlorine acts as a catalyst and breaks down ozone into oxygen.
Description : Ozone layer of upper atmosphere is being destroyed by:
Last Answer : Ozone layer of upper atmosphere is being destroyed by: A. Chlorofluorocarbon B. `SO_(2)` C. photochemical oxidants/`O_(2)` and `CO_(2)` D. smog.
Description : The zone of atmosphere in which the ozone layer is
Last Answer : The zone of atmosphere in which the ozone layer is A. lonosphere B. Mesosphere C. Stratosphere D. Troposphere
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 : Ozone layer in the outer atmosphere helps us in – (1) reflecting radio waves and makes radio communication possible (2) regulating he temperature of atmosphere (3) absorbing cosmic ray particles (4) absorbing U-V radiations
Last Answer : (4) absorbing U-V radiations Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (03) which absorbs 97- 99% of the Sun's medium-frequency ultraviolet light.
Description : Ultra violet light of Sun's radiation is prevented from reaching the earth's atmosphere by the layer of – (1) Oxygen (2) Hydrogen (3) Ozone (4) Helium
Last Answer : (3) Ozone Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (03). The layer absorbs 97-99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth.
Description : The ozone layer in the atmosphere is at a height of about ______. (1) 25 km (2) 50 km (3) 100 km (4) 200 km
Last Answer : (2) 50 km Explanation: Ozone is mainly found in two regions of the Earth's atmosphere. Most ozone (about 90%) resides in a layer that begins between 10 to 17 kilometers above the Earth's surface and extends up to about 50 kilometers