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PE practice questions and answers

What is the oxidation state of Carbon in Carbonate (CO3-2)

(A) -2

(B) 4

(C) 1

(D) 2

The Correct Answer

The Principles and Practice of Engineering exam is the examination required for one to become a Professional Engineer (PE) in the United States. It is the second exam required, coming after the Fundamentals of Engineering exam.