Which of the following statements regarding the effects of gaseous air pollutants is not correct?a)Sulphur Dioxide causes stiffness of flower buds which fall off from the plantsb)The red haze in traffic is due to existence of oxides of Nitrogenc)Hydrocarbon pollutants are formed by incomplete combustion of fueld)Carbon dioxide binds with haemoglobin in blood to form carboxyhaemoglobinCorrect answer is option 'D'. Can you explain this answer?

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Which of the following statements regarding the effects of gaseous air pollutants is not correct?

a)
Sulphur Dioxide causes stiffness of flower buds which fall off from the plants
b)
The red haze in traffic is due to existence of oxides of Nitrogen
c)
Hydrocarbon pollutants are formed by incomplete combustion of fuel
d)
Carbon dioxide binds with haemoglobin in blood to form carboxyhaemoglobin

Correct answer is option 'D'. Can you explain this answer?

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Test: Environment & Ecology - 3

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Which of the following statements regarding the effects of gaseous ai...

Statement (a) is correct: Oxides of sulphur are produced when sulphur containing fossil fuel is burnt. The most common species, sulphur dioxide, is a gas that is poisonous to both animals and plants. It has been reported that even a low concentration of sulphur dioxide causes respiratory diseases e.g., asthma, bronchitis, emphysema in human beings. Sulphur dioxide causes irritation to the eyes, resulting in tears and redness. High concentration of SO₂ leads to stiffness of flower buds which eventually fall off from plants.
Statement (b) is correct: Dinitrogen and dioxygen are the main constituents of air. These gases do not react with each other at a normal temperature. At high altitudes when lightning strikes, they combine to form oxides of nitrogen. NO₂ is oxidised to nitrate ion, NO3- which is washed into soil, where it serves as a fertilizer. In an automobile engine, (at high temperature) when fossil fuel is burnt, dinitrogen and dioxygen combine to yield significant quantities of nitric oxide (NO) and nitrogen dioxide (NO₂). The irritant red haze in the traffic and congested places is due to oxides of nitrogen. Higher concentrations of NO₂ damage the leaves of plants and retard the rate of photosynthesis. Nitrogen dioxide is a lung irritant that can lead to an acute respiratory disease in children. It is toxic to living tissues also. Nitrogen dioxide is also harmful to various textile fibres and metals.
Statement (c) is correct: Hydrocarbons are composed of hydrogen and carbon only and are formed by incomplete combustion of fuel used in automobiles. Hydrocarbons are carcinogenic, i.e., they cause cancer. They harm plants by causing ageing, breakdown of tissues and shedding of leaves, flowers and twigs.
Statement (d) is not correct: Carbon monoxide (CO) is one of the most serious air pollutants. It is a colourless and odourless gas, highly poisonous to living beings because of its ability to block the delivery of oxygen to the organs and tissues. It is produced as a result of incomplete combustion of carbon. Carbon monoxide is mainly released into the air by automobile exhaust. It binds to haemoglobin to form carboxyhaemoglobin, which is about 300 times more stable than the oxygen-haemoglobin complex. In blood, when the concentration of carboxyhaemoglobin reaches about 3–4 per cent, the oxygen carrying capacity of blood is greatly reduced. This oxygen deficiency, results into headache, weak eyesight, nervousness and cardiovascular disorder.

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Which of the following statements regarding the effects of gaseous air pollutants is not correct?a)Sulphur Dioxide causes stiffness of flower buds which fall off from the plantsb)The red haze in traffic is due to existence of oxides of Nitrogenc)Hydrocarbon pollutants are formed by incomplete combustion of fueld)Carbon dioxide binds with haemoglobin in blood to form carboxyhaemoglobinCorrect answer is option 'D'. Can you explain this answer?

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Which of the following statements regarding the effects of gaseous air pollutants is not correct?a)Sulphur Dioxide causes stiffness of flower buds which fall off from the plantsb)The red haze in traffic is due to existence of oxides of Nitrogenc)Hydrocarbon pollutants are formed by incomplete combustion of fueld)Carbon dioxide binds with haemoglobin in blood to form carboxyhaemoglobinCorrect answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements regarding the effects of gaseous air pollutants is not correct?a)Sulphur Dioxide causes stiffness of flower buds which fall off from the plantsb)The red haze in traffic is due to existence of oxides of Nitrogenc)Hydrocarbon pollutants are formed by incomplete combustion of fueld)Carbon dioxide binds with haemoglobin in blood to form carboxyhaemoglobinCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding the effects of gaseous air pollutants is not correct?a)Sulphur Dioxide causes stiffness of flower buds which fall off from the plantsb)The red haze in traffic is due to existence of oxides of Nitrogenc)Hydrocarbon pollutants are formed by incomplete combustion of fueld)Carbon dioxide binds with haemoglobin in blood to form carboxyhaemoglobinCorrect answer is option 'D'. Can you explain this answer?.

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