Ozone Flashcards
What is ozone?
Ozone is a molecule composed of three oxygen atoms (O3).
True or False: Ozone is beneficial in the troposphere but harmful in the stratosphere.
False: Ozone is beneficial in the stratosphere but harmful in the troposphere.
What are the main functions of the ozone layer?
The ozone layer protects life on Earth by absorbing the majority of the Sun’s harmful ultraviolet (UV) radiation.
Fill in the blank: The depletion of the ozone layer is primarily caused by __________.
chlorofluorocarbons (CFCs).
What are CFCs?
Chlorofluorocarbons (CFCs) are man-made compounds used in refrigeration, air conditioning, and aerosol propellants.
How do CFCs lead to ozone depletion?
CFCs release chlorine atoms in the stratosphere when they are broken down by UV radiation, which then catalyze the destruction of ozone molecules.
What are some alternatives to CFCs?
Hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) are some alternatives, although HFCs are also being phased out due to their global warming potential.
What is the role of UV radiation in ozone depletion?
UV radiation breaks down CFCs, releasing chlorine atoms that destroy ozone.
What are the health effects of increased UV exposure due to ozone depletion?
Increased UV exposure can lead to higher rates of skin cancer, cataracts, and weakened immune systems.
What is the significance of the term ‘ozone depletion potential’ (ODP)?
ODP is a measure of the relative ability of a substance to destroy ozone compared to CFC-11.
What is the difference between stratospheric ozone and tropospheric ozone?
Stratospheric ozone is beneficial and protects against UV radiation, while tropospheric ozone is a pollutant that can harm health and vegetation.
True or False: Ozone is constantly being created and destroyed in the stratosphere.
True.
Electronegativity is…
the relative ability of an atom to attract a pair of lone pair of electrons from a covalent bond.
How are ID - ID formed?
There is an uneven distrubtion of electrons which creates a temporary dipole . This induces dipoles in neighbouring molecules
How do PD -PD form?
Large difference in EN of atoms across the molecule which creates permanent dipoles. The oppositely chard parts of the molecules attract each other.
