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Which of the following is not correct about carbon monoxide?

1. It reduces oxygen carrying ability of blood
2. The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin
3. It is produced due to incomplete combustion
4. It forms carboxyhaemoglobin

Correct answer: The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin

Solution

Carboxyhaemoglobin is more stable than oxyhaemoglobin, which is why carbon monoxide poisoning is so dangerous. This makes option B incorrect.

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