1. Ozone is





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MCQ->Consider the following statements: Ozone is mostly found in the stratosphere. Ozone layer lies 55-75 km above the surface of the Earth. Ozone absorbs ultraviolet radiation from the Sun. Ozone layer has no significance for life on the Earth....
MCQ->In this question, a passage is given followed by a statement. Read the passage carefully and judge the statement based on the given passage. Delhi, the capital of India and one of the largest cities in the world, is under severe stress, thanks to urbanisation, increasing population and alarming levels of pollution. Studies have proved that transportation, industrial and residential sectors are the largest polluters, and that the citizens are exposed to high levels of nitrogen oxides (NOx), ozone (O3), black carbon (BC) and particulate matter (PM). The 2015 Global Burden of Disease report attributes about 1.09 million deaths in India to PM 2.51 and identifies air pollution to be among the top 10 health risks in the country. As per the World Health Organisation, 37 Indian cities are among the world’s top 100 cities with very high levels of PM10. Ozone formation requires both oxides of nitrogen (NOx) and volatile organic compounds (VOCs), along with sunlight and warm temperature. Therefore, the ground level ozone in the city exceeds the threshold limit largely during summer months. Statement: The ground level ozone in the city doesn't exceed the limit largely during Summer.Choose the appropriate one from the following options A -The statement is definitely true. B -The statement is probably true. C -The statement is cannot be determined. D -The statement is definitely false.....
MCQ->Some sentences are grammatically incorrect or inappropriate. Select the option that indicates the grammatically correct and appropriate sentence(s).A. Large reductions in the ozone layer, which sits about 15-30 km above the Earth, take place each winter over the polar regions, especially the Antarctic, as low temperatures allow the formation of stratospheric clouds that assist chemical reactions breaking down ozone.B. Industrial chemicals containing chlorine and bromine have been blamed for thinning the layer because they attack the ozone molecules, making them to break apart.C. Many an offending chemicals have now been banned.D. It will still take several decades before these substances have disappeared from the atmosphere.....
MCQ->Which of the following statements regarding ozone layer within the atmosphere is/are correct? It absorbs most of the ultraviolet radiation found in the Sun's rays. Chlorofluorocarbons are serious threat to the ozone layer. Select the correct answer using the code given below:....
MCQ->Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of....
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