CO ki maatra : Effects
50 ppm : permissible limit (no effect)
200 ppm : 2 hour me seer dard
400 ppm : 45 min me seer dard, chances of unconsciousness
1200 ppm : 30 min me seer dard, confusion , behoshi
2000 ppm : 10 min me comma
5000 ppm : 1 min me breathing stop & maut
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