Is chlorofluorocarbons harmful to ozone layer?
Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun.
What are the harmful effects of chlorofluorocarbons?
CFCs react with the ozone gas in our atmosphere and leave us vulnerable to harmful effects of ultraviolet radiations of the sun. CFC is the refrigerant which causes ozone layer depletion.
Why excess of CFC is a cause of concern?
When CFCs reach upper layers of the atmosphere they cause depletion of ozone layer and allow harmful UV radiations to reach the surface of the earth to create health hazards.
What are CFCs Why are they considered harmful for life on Earth?
CFC is a gas, chloro fluoro carbon. It can be found in the cool appliances that we use in our home such as refrigerators or air conditioners. These aree harmful as they are responsible for the depletion of ozone layer. they may deplete our earth 's resources and may lead to global warming…….
How CFCs deplete the ozone layer equation?
Cl + O3 = ClO + O2 When the molecule of chlorine monoxide (ClO) meets another molecule of oxygen (O) it breaks up, releasing chlorine (Cl), which can “destroy” another molecule of ozone (O3), creating the catalytic cycle of chlorine.
What destroys the ozone layer?
Chlorofluorocarbons (CFCs) have been identified as the main cause of the destruction to the ozone layer, but there are also compounds containing bromine, other halogen compounds and also nitrogen oxides which cause damage.
How do chlorofluorocarbons contribute to ozone depletion quizlet?
how does Chlorofluorocarbons (CFC's)affect ozone depletion? , CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing the chlorine that catalytically destroys ozone.
Why is damage to the ozone layer?
Chlorofluorocarbons or CFCs are the main cause of ozone layer depletion. These are released by solvents, spray aerosols, refrigerators, air-conditioners, etc. The molecules of chlorofluorocarbons in the stratosphere are broken down by ultraviolet radiations and release chlorine atoms.
Why is the ozone layer damage?
Scientists also discovered that the thinning in the ozone layer was caused by increasing concentrations of ozone-depleting chemicals – chlorofluorocarbons or CFCs (compounds with chlorine and/or fluorine attached to carbon) and to a lesser extent halons (similar compounds with bromine or iodine).
How do CFCs cause ozone depletion quizlet?
How do CFCs cause ozone depletion? Ultraviolet radiation breaks down CFCs, molecules containing chlorine. Chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.
How do chlorofluorocarbons affect Earth’s ozone layer quizlet?
how does Chlorofluorocarbons (CFC's)affect ozone depletion? , CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing the chlorine that catalytically destroys ozone.
What causes damage to the ozone layer quizlet?
Ozone depletion occurs when chlorofluorocarbons (CFCs)—formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.
How is ozone formed in the upper atmosphere Why is the damage of ozone layer a cause of concern to us state a cause of this damage?
Ozone is formed in upper atmosphere by the reaction of ultraviolet UV radiations on oxygen O2 molecule. The damage to ozone layer is a cause of concern to us as due to its damage more ultraviolet rays reach the earth's surface causing various health hazards.
How is ozone layer formed what is the reason for the depletion of this layer What is the effect of ozone layer depletion?
Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. It is destroyed more quickly than it is created.
What causes ozone depletion?
Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere (see details below).
What are chlorofluorocarbons CFCs quizlet?
chlorofluorocarbons (CFCs) Organic compounds made up of atoms of carbon, chlorine, and fluorine. An example is Freon-12 (CCl2F2), used as a refrigerant in refrigerators and air conditioners and in making plastics such as Styrofoam.
What is the major concern with CFCs in the atmosphere quizlet?
Ozone depletion occurs when chlorofluorocarbons (CFCs)—formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.
Why is the damage to the ozone layer a cause of concern what steps are being taken to limit this damage?
CFCs (chlorofluorocarbons) are chemicals that deplete the ozone layer. The release of CFCs into the atmosphere must be curtailed to limit the harm to the ozone layer. CFCs should be replaced with environmentally friendly replacements in refrigerants and fire extinguishers.
What causes damage to ozone layer?
The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (chlorofluorocarbons (CFCs), HCFCs, halons).
What is the harm from the depletion of Earth’s ozone layer?
Ozone layer depletion causes increased UV radiation levels at the Earth's surface, which is damaging to human health. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders.
How does ozone depletion occur and what are the harmful effects?
Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. It is destroyed more quickly than it is created.
What are the harmful effects of ozone layer depletion?
Ozone layer depletion causes increased UV radiation levels at the Earth's surface, which is damaging to human health. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders.
What is the process by which chlorofluorocarbons destroy ozone molecules in the stratosphere?
Describe the process by which chlorofluorocarbons destroy ozone molecules in the stratosphere. CFC molecules break apart high in the stratosphere, where UV radiation a powerful energy source, is absorbed. Once CFC molecules break apart, parts of the CFC molecules destroy protective ozone.
What causes the most damage to the ozone layer?
The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (chlorofluorocarbons (CFCs), HCFCs, halons).
What do you mean by chlorofluorocarbon?
chlorofluorocarbon (CFC), any of several organic compounds composed of carbon, fluorine, and chlorine. When CFCs also contain hydrogen in place of one or more chlorines, they are called hydrochlorofluorocarbons, or HCFCs. CFCs are also called Freons, a trademark of the E.I.
What is ozone How does it affect ecosystem What is causing damage to ozone layer?
Ozone is a gas composed of three atoms of oxygen. It is a harmful gas and is present high up in the atmosphere. Ozone is an important gas for all kinds of ecosystems on earth as it protects the ecosystem from the harmful effects of ultraviolet radiations cause skin cancer, cataract and affect our immune system.
Why is damage to the ozone layer a cause?
Damage to the ozone layer is a cause for concern because the harmful ultraviolet (UV) radiation from the sun will reach the earth. This radiation is highly damaging to organisms, for example, is known to cause skin cancer in human beings.
What is the reason for the depletion of ozone layer?
The main cause of ozone layer depletion is the build-up of chlorofluorocarbon(CFC's) in the atmosphere. When the CFC's reaches the upper atmosphere, high UV radiation reacts with these and releases chlorine atoms. These free chlorine atoms react with ozone thereby leading to the depletion of the ozone layer.
What are the harmful effects of ozone depletion Class 8?
The following are the harmful effects of ozone depletion.
- It causes UV rays to reach the earth and it causes harm to living organisms.
- It can lead to skin cancer in humans.
- It can lead to cataracts in humans.
- It can lead to damage to our immune system by lowering the body's resistance to diseases.
What is the main cause of depletion of ozone layer?
The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (chlorofluorocarbons (CFCs), HCFCs, halons).