Question : The major harmful gas emitted by automobile vehicle which causes air pollution is
Option 1: Carbon monoxide
Option 2: Methane
Option 3: Carbon dioxide
Option 4: Ozone gas
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Correct Answer: Carbon monoxide
Solution : The correct answer is carbon monoxide.
Carbon monoxide is a harmful colourless gas which is released by the incomplete combustion of fossil fuels in automobiles. It is harmful for human beings as it has high affinity with haemoglobin molecules and forms a stable compound, which decreases the oxygen carrying capacity of the blood. It is released from automobile exhaust, industries etc. Other gases released from automobiles are carbon dioxide, Sulphur dioxide and nitrogen oxides.
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