Chemistry
Answer
Ozone layer can be protected by :
- Use of products that contain CFC's to be replaced by alternative products.
- Substitutes for CFC's have been initiated by scientists and use of HCFC [hydro chlorofluorocarbons] is being considered. Labelling products as CFC free is initiated.
- International Treaty [Montreal protocol] was also initiated to prevent ozone depletion.
Related Questions
Name the chemicals responsible for destruction of the ozone layer. State the main chemical from these chemicals, which is responsible for more than 80% ozone depletion. State the man-made applications which make use of that chemical.
State the role of chlorofluorocarbons in ozone destruction or depletion [no equations required].
Select the correct answer from the choice A, B, C given in each case.
The major pollutant released during burning of fossil fuels.
A: Carbon monoxide B: Sulphur dioxide C: Hydrogen sulphideThe green house gas which on combustion produces another green house gas.
A: Nitrous oxide B: Ozone C: MethaneThe gas which in presence of U.V. light gives two atoms of the same gas.
A: Oxygen B: Ozone C: Carbon dioxideA chemical responsible for ozone depletion.
A: Methyl acetylene B: Methyl chloride C: MethanolA renewable source of energy which causes minimum or no pollution.
A: Fossil fuel B: L.P.G. C: Hydro power.
Give balanced equations for the following conversions [one or two steps].
- Sulphur trioxide to sulphuric acid – a constituent of acid rain.
- Nitrogen to nitrogen dioxide – in an internal combustion engine.
- Methane to carbon dioxide – a green house gas.
- A molecule of ozone to two molecules of oxygen gas.
- Oxygen to ozone gas by photolysis.