Which type of radiations are absorbed by the upper layer of the atmosphere? (1) Radio-waves (2)Infrared (3) Visible (4) Ultraviolet Answer : Ultraviolet...
In upper layer of atmosphere ozone is formed by (1) the action of ultraviolet rays on oxygen (2) the combination of oxygen molecules (3) subjecting oxygen to high pressure (4) the action of nitrogen on oxygen in atmosphere Answer : the action of ultraviolet rays on oxygen...
In the absence of ozone layer, which rays will enter into atmosphere? (1) Infrared (2) Visible (3) Ultraviolet (4) X-rays Answer : Ultraviolet...
Ozone layer is formed due to reactions of : (1) oxygen and ultraviolet rays (2) carbon dioxide and layers of atmosphere (3) cosmic rays and layers of atmosphere (4) infrared rays and ultraviolet rays Answer : oxygen and ultraviolet rays...
89. Which one of the following is a wrong statement ? (1) Eutrophication is a natural phenomenon in freshwater bodies (2) Most of the forests have been lost in tropical areas (3) Ozone in upper part of atmosphere is harmful to animals (4) Greenhouse effect is a natural phenomenon
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