Post-UTME Chemistry 2019 Objective — Question 5
Question 5 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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An atom, P reacts by losing two electrons on the outermost shell which are accepted by two Q atoms. The oxidation states of P and Q are respectively
- A. +1 and -1
- B. +2 and -2
- C. -2 and +2
- D. +2 and -1Correct
Explanation
P loses 2 electrons to become +2. Since 2 electrons are shared between two Q atoms (one each), each Q atom gains 1 electron to become -1.
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