Question : The main cause of the hole in the ozone layer is the release of:
Option 1: Carbon dioxide
Option 2: Methane
Option 3: CFCs (chlorofluorocarbons)
Option 4: Nitrous oxide
Correct Answer: CFCs (chlorofluorocarbons)
Solution : The correct answer is (C) CFCs (chlorofluorocarbons).
The main cause of the hole in the ozone layer is the release of certain chemicals known as chlorofluorocarbons (CFCs). CFCs were commonly used in various industries, such as aerosol propellants, refrigeration, and air conditioning. When released into the atmosphere, CFCs can reach the stratosphere, where they undergo chemical reactions triggered by ultraviolet (UV) radiation from the Sun.
These reactions break down the CFC molecules and release chlorine atoms. The chlorine atoms then catalytically destroy ozone molecules, leading to the thinning of the ozone layer. This thinning is particularly prominent in certain regions, such as over Antarctica, where a "hole" in the ozone layer has been observed.
Question : What is the main greenhouse gas responsible for global warming?
Option 3: Nitrous oxide
Option 4: Ozone
Question : Which of the following groups of gases contribute to the "Green House Effect"?
Option 1: Carbon dioxide and Methane
Option 2: Ammonia and Ozone
Option 3: Carbon monoxide and Sulphur dioxide
Option 4: Carbon tetrafluoride and Nitrous oxide
Question : Which of the following is not a greenhouse gas?
Option 1: Nitrogen
Option 3: Carbon dioxide
Question : Acid rain is primarily caused by emissions of:
Option 1: Sulfur dioxide and nitrogen oxides
Option 2: Carbon dioxide and ozone
Option 3: Methane and CFCs
Option 4: Lead and mercury
Question : Which of the following green houses gases has the greatest heat trapping ability?
Option 1: Chlorofluro carbon
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