Q781
Which one of the following metals pollutes the air of a city having large number of automobiles?
A.
Cadmium
B.
Chromium
C.
Lead
AnswerD.
Copper
Answer: Option C
Solution
Answer: Option C
Solution:
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.