How does CFC gas damage the ozone layer in the atmosphere ?

1 Answer

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.

Related questions

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 : Dangerous gas for depletion of ozone layer is: (A)Ethane (B) Methane (C)CFC (D) Carbon-dioxide

Last Answer : (C)CFC

Description : Role of CFC present in atmosphere is to a) Reduction in ozone b) Ozone formation c) Formation of leg haemoglobin a) Enhance chlorophyll formation.

Last Answer : a) Reduction in ozone

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 : The pollutant responsible for ozone holes is - (1) CO2 (2) SO2 (3) CO (4) CFC

Last Answer : (4) CFC Explanation: Chlorofluorocarbons (CFCs) have been held responsible for the depletion of ozone layer. The manufacture of CFCs has been phased out under the Montreal Protocol, and they are being replaced with other products such as HFCs.

Description : The pollutant responsible for ozone holes is _____. (1) CO2 (2) SO2 (3) CO (4) CFC

Last Answer : CFC

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.

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 : 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 : solar ultraviolet radiation

Description : In upper layer of atmosphere ozone is formed by (1) the action of ultraviolet rays on oxygen (2) the combination of oxygen molecules (3) subjecting oxygen to high pressure (4) the action of nitrogen on oxygen in atmosphere

Last Answer :  the action of ultraviolet rays on oxygen

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 : Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage? -Biology

Last Answer : The ozone shields the surface of the earth from ultraviolet (UV) radiation from the sun. These radiations are highly damaging as they can cause cancer in both plants and animals, ... United Nations Environment Programme (UNEP) succeeded in reaching an agreement to freeze CFC production at 1986

Description : Why is damage to the ozone layer a cause for concern ? What steps are being taken to limit this damage ? -Biology

Last Answer : The damage to the ozone layer is a cause for concern because if the ozone layer in the atmosphere disappears completely, then all the extremely harmful ultraviolet radiations coming from the ... ) unanimously forged an agreement among its member countries to freeze CFC production at 1986 levels.

Description : Green House Effect' means (1) Pollution in houses in tropical region (2) Prevention of ultraviolet radiation by the ozone layer (3) Trapping of solar energy due to atmospheric gases (4) Damage to green painted buildings

Last Answer : (3) Trapping of solar energy due to atmospheric gases Explanation: The greenhouse effect occurs when Earth's atmosphere traps solar radiation because of the presence of certain gases, causing the ... , nitrous oxide (N2O) and other gases, ac-cording to the Environmental Protection Agency (EPA

Description : What are CFC’s? How do they damage ozone layer?

Last Answer : CFC stands for chloro-fluoro carbons. It is a product of industrial processes involved in the manufacturing of insulating foams, solvents, cooling equipments like refrigerators, air conditioners. It ... CFC in the stratosphere into chlorine atoms. Chlorine reacts with ozone and breaks into oxygen

Description : Green House Effect’ means (1) Pollution in houses in tropical region (2) Prevention of ultraviolet radiation by the ozone layer (3) Trapping of solar energy due to atmospheric gases (4) Damage to green painted buildings

Last Answer : Trapping of solar energy due to atmospheric gases

Description : In 2002 AD,CFC concentration of atmosphere was

Last Answer : In 2002 AD,CFC concentration of atmosphere was A. 261 ppt B. 326 ppb C. 1750 ppb D. 368 ppm.

Description : What is the name of the layer of the Earth's atmosphere that contains the ozone layer?

Last Answer : A: The stratosphere.

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 : 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 : 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 : 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 : 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

Description : In the absence of ozone layer, Which rays will enter into atmosphere? (1) Infrared (2) Visible (3) Ultraviolet (4) X-rays

Last Answer : (3) Ultraviolet Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (O3). The ozone layer absorbs 97-99% of the Sun's medium-frequency ... (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth.

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 : The ozone layer in the atmosphere is necessary for our survival. Why?

Last Answer : Ans: ozone layer in the atmosphere is very necessary for plant and animal survival because it is the absorber of ultraviolet rays which are very dangerous for animal health. Ultraviolet rays cause cancer ... that is why the ozone layer is necessary and essential for animal as well as plant survival.

Description : The ozone layer in the atmosphere is at a height of about how many k.m.?

Last Answer : 50 km

Description : The ozone layer in the atmosphere is at a height of about how many k.m.?

Last Answer : 50 km

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 : 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 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

Description : A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it. (A) Hydrogen (B) Carbon dioxide (C) Ozone (D) None of these

Last Answer : (C) Ozone

Description : Pick out the wrong statement. (A) The concentric layer in atmosphere which contains about 70% of the total mass of atmosphere and characterised by a steady decrease in temperature is called stratosphere (B) ... ) The earth's atmosphere is an envelope of gases extending upto a height of about 200 kms

Last Answer : (A) The concentric layer in atmosphere which contains about 70% of the total mass of atmosphere and characterised by a steady decrease in temperature is called stratosphere

Description : The ozone layer in the atmosphere is at a height of about how many k.m.? —

Last Answer : 50 km

Description : Depletion of ozone layer in the atmosphere causes cancer of a) skin b)stomach c)blood d)lungs

Last Answer : a) skin

Description : The ozone layer is located in which region of the atmosphere?

Last Answer : ANSWER: STRATOSPHERE

Description : Ozone layer in the outer atmosphere helps us in (1) reflecting radio waves and makes radio communication possible (2) regulating the temperature of atmosphere (3) absorbing cosmic ray particles (4) absorbing U-V radiations

Last Answer :  absorbing U-V radiations

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 : Ozone

Description : In the absence of ozone layer, which rays will enter into atmosphere? (1) Infrared (2) Visible (3) Ultraviolet (4) X-rays

Last Answer : Ultraviolet

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 : oxygen and ultraviolet rays

Description : Which layer of the earth’s atmosphere contains the ozone layer ? (1) Troposphere (2) Mesosphere (3) Ionosphere (4) Stratosphere

Last Answer : Stratosphere

Description : Which of the following is NOT a primary green house gas in the earth's atmosphere? (1) Methane (2) Ozone (3) Nitrous oxide (4) Hydrogen

Last Answer : (4) Hydrogen Explanation: Greenhouse gases are those that absorb and emit infrared radiation in the wavelength range emitted by Earth.

Last Answer : CFC gas is harmful to the environment as it creates holes in the ozone layer.