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  4. Most hazardous metal pollutant of automobile exhaust is :

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Q. Most hazardous metal pollutant of automobile exhaust is :

Haryana PMTHaryana PMT 2003

Solution:

Lead, cadmium, copper and mercury are common heavy metal pollutants. Lead is the most immobile heavy metal pollutant. Because of its immobility, lead poisoning is localised. Lead is a common pollutant from dry cell or battery manufacturing plants and automobile exhausts. Lead is used as an antiknock agent in petrol as tetraethyl and tetramethyl lead.