What are CFCs why are they harmful to the environment?

What are CFCs why are they harmful to the environment?

Chlorofluorocarbons, or CFCs, are compounds made up of combinations of the elements chlorine, fluorine and carbon; aerosols, refrigerants and foams contain CFCs. When these CFCs enter the air, they rise up into the atmosphere to meet up with and destroy ozone molecules.

How does CFC affect the ozone layer?

Once in the atmosphere, CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules. The seasons have an impact on the Antarctic ozone hole. When sunlight returns in the spring, the chlorine begins to destroy ozone.

What are the harmful effects of CFC Class 8?

Chlorofluorocarbons react with the ozone in the upper atmosphere and destroy the ozone layer, making the layer thinner and allowing ultraviolet (UV) radiation to pass through it and fall on the earth’s surface. This UV radiation can cause skin cancer and other ailments in humans and also affect plants and animals.

What are 2 examples of CFCs?

An example of a refrigerant CFC is dichlorodifluoromethane, CF2Cl2 (also known as CFC-12), which boils at -30°C. Another once-common CFC is trichlorofluoromethane, CFCl3 (CFC-11), which boils at 24°C and was once the propellant in around half of all the aerosol cans used in the world.

How are CFCs harmful for the environment and living beings Class 9?

AnsweR: CFCs are harmful both on environment and living beings. It makes greenhouse effect and which cause harm to the ozone layer. If the ozone layer is harmed then the UVrays Will harm us and can cause many diseases like cancer etc.

How are CFCs harmful Class 9?

CFCs contain both chlorine and fluorine. Free chlorine atoms catalyse the breakdown of ozone molecules (03) into oxygen. This results in degradation of the ozone layer. Thinning of the ozone layer would allow penetration of ultraviolet light into Earth’s atmosphere causing blindness, skin cancer and mutations.

What are sources of CFCs?

The most common source of CFCs are refrigerants, but fire suppression systems for aircraft and aerosols also emit CFCs into the atmosphere.

  • Refrigerators and Air Conditioners. The most common emitter of CFCs are refrigerants, particularly those used after the 1930s.
  • Aircraft Halon.
  • Aerosol Sprays.
  • Rogue CFCs.

What are CFCs used for?

Chlorofluorocarbons (CFCs) are largely used as refrigerants, solvents, degreasing agents in the electronic industry, blowing agents in plastic formation and propellants for aerosol cans.

What are CFCs for Class 9?

Chlorofluorocarbons (CFC) are gases used for various purposes including solvents, refrigerants and aerosol sprays. They are organic chemicals and contain carbon, (sometimes hydrogen,) chlorine, and fluorine.

What are the most common CFCs?

The most abundant CFCs emitted into the troposphere are CFC 11 and CFC 12. These CFCs are not soluble in water, so deposition does not removed them from the air.

What are CFCs and what 4 elements make up CFCs?

CFCs are halocarbons that contain only the elements carbon, chlorine, and fluorine. The most common CFCs are small molecules containing only one or two carbon atoms.

Is CFC a greenhouse gas?

The compounds that only contain carbon, chlorine, and fluorine are called chlorofluorocarbons (CFCs). Chlorofluorocarbons are exceptionally strong greenhouse gases and are also responsible for the destruction of stratospheric ozone.

One of the trade names of CFCs is freon, which is used as a coolant not only for refrigerators but for air conditioning units, both in vehicles and in homes. Atmospheric chlorine derived from chlorofluorocarbons (CFCs) converts ozone to oxygen molecules.

What is CFC made out of?

Chlorofluorocarbon (CFC) is a gaseous compound made of three elements, carbon, chlorine and fluorine (and sometimes hydrogen). Manufacturers have used this compound to make cleaning solvents, refrigerants, and aerosol propellants, in some cases, even plastic foams.

What does CFC stand for?

The Combined Federal Campaign (CFC) is the largest and most successful workplace charitable giving drive in the world.

What are CFCs and why are they bad for the environment?

Studies conducted in the 1970s found that CFCs when released into the atmosphere (a common occurrence in cars, and refrigerant equipment), they caused a significant deterioration of the ozone layer in the atmosphere. This is important because the ozone layer protects human skin and many living organisms from ultraviolet rays emitted from the sun.