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Which one of the following metals pollutes the air of a...

This question belongs to General Knowledge Chemistry
Chemistry
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Which one of the following metals pollutes the air of a city having large number of automobiles?

Answer & Solution
Correct Answer: Option C
Tetra ethyl lead (C2H5)4 Pb is used as an antiknock compound . It is mixed with petrol to improve its quality. Therefore automobile exhausts lead, which pollutes city.
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