Which of the following can function as Lewis acid?
Correct answer: D. I+
- A. CN-
- B. NH3
- C. CH3 - O - CH3
- D. I+
Explanation
The correct answer is I+. A Lewis acid is defined as an electron pair acceptor, and I+ fits this definition because of its positive charge and incomplete octet, making it electron-deficient. This allows it to accept electron pairs from Lewis bases. Other options, such as CN-, NH3, and CH3 - O - CH3, are more likely to donate electron pairs due to their lone pairs or negative charge, making them Lewis bases instead.
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