Which one of the following toxic metals is extensively present in newspaper?
Correct answer: C. Pb
- A. Mg
- B. Cd
- C. Pb
- D. Hg
Explanation
Lead, symbol Pb, was historically used in printing inks and could therefore be present in newspapers. Students may choose mercury because it is a well-known toxic metal, but mercury was not the characteristic metal associated with newspaper printing ink.
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