Question : Which of the following gases is most toxic ?
Option 1: Carbon dioxide
Option 2: Carbon monoxide
Option 3: Sulphur dioxide
Option 4: Chlorine
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Correct Answer: Carbon monoxide
Solution : The correct answer is carbon monoxide.
Carbon monoxide is a released on the incomplete combustion of fuels. It is a tasteless, odorless and colourless gas which is toxic for human beings. It binds with haemoglobin in the blood and forms a stable compound known as carboxyhaemoglobin. Carbon monoxide has high haemoglobin affinity and it reduces the oxygen carrying capacity of blood, which turns life threatening.
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