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Oxidation and Reduction

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  1. Which among the following elements (metals) pollutes the airof a city having large number of automobiles?
    1. Cadmium
    2. Lead
    3. Chromium
    4. Nickel
Correct Option: B

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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