Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?
Correct answer: B. Causes asphyxia
- A. Acts as a green house gas thereby raising earth's temperature
- B. Causes asphyxia
- C. Causes increase in sea level
- D. Enhances the green house effect
Explanation
Carbon monoxide binds strongly with haemoglobin, forming carboxyhaemoglobin and preventing blood from carrying oxygen, so concentrations above the TLV can cause asphyxia. Its major source is incomplete combustion, especially in vehicle exhaust, not chlorophyll decomposition.
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