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प्रश्न
What are the causes of depletion of ozone layer? Which diseases are likely to be caused if the ozone layer will become thinner?
उत्तर
Chlorofluorocarbons, which are widely used in refrigerators, fire extinguishers and aerosol sprayers, are released into the air and react with the ozone present in the ozone layer and destroy it gradually. This causes the depletion of the ozone layer. If the ozone layer becomes thinner, harmful ultraviolet radiations will enter the earth and may cause skin cancer and other ailments in humans and also affect plants and animals.
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संबंधित प्रश्न
What is ozone?
The excessive exposure of humans to ultraviolet rays results in:
- damage to immune system
- damage to lungs
- skin cancer
- peptic ulcers
The gas A is used by most of the animals to obtain energy from food by the process of respiration. When A is acted upon by radiation X, it gets converted into another gas B which is an allotrope of A but poisonous when inhaled. B forms a kind of layer C in the upper atmosphere which absorbs radiations X coming from a source Y and prevent them from reaching the earth. Some chemicals Z released from the various devices on the earth are destroying the layer C slowly. In fact, a hole has already been formed in layer C over the area D of the earth.
(a) What are gases (i) A, and (ii) B? Write their molecular formulae.
(b) Name the layer C.
(c) What are (i) X, (ii) Y, and (iii) Z?
(d) Name the area D.
(e) Name any two human ailments which may be caused by X.
Which Gas is present in large amount in the upper part of stratosphere.
Number of Oxygen atom in Ozone.
Ozone is abundant in this layer. Ozone heats this layer as it absorbs from incoming ultraviolet radiation from the sun:
Enumerate methods of protecting the ozone layer and preventing its depletion.
Select the correct answer from the following statement:
The gas which in presence of U.V. light gives two atoms of the same gas.
______ was signed in 1987 to control emission of ozone depleting substances.
Why was there a sharp in the amount of ozone in the atmosphere in 1980's.
