MCAT General Chemistry Question 296: Answer and Explanation
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Question: 296
3. Which of the following substances has the atom with the greatest oxidation state?
- A. CH2F2
- B. K2O
- C. S4O62--
- D. Fe2O3
Correct Answer: D
Explanation:
D Assigning oxidation states yields:
CH2F2: F = -1, H = 0, C = –2;
K2O: K = +1, O = -2;
S4O62-: O = -2, S = average of +2.5;
Fe2O3: O = -2, Fe = +3;
Since +3 is the greatest number, choice D is the best answer.