Need help with practice MCAT question (acidit, basic or neutral?)

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The discussion centers on a practice MCAT question regarding acidity, where the answer key indicates option D, but the explanation is unclear. Participants express confusion over the term "amphoteric" and the role of alcohol groups in aqueous solutions. There is a consensus that terminal alkynes are acidic, but confusion arises due to the absence of a terminal triple bond in the question. Participants question the accuracy of the answer key and suggest a possible mistake in the book. Ultimately, the conclusion is that the book likely contains an error.
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The answer key states the the answer is D but the explanation makes no sense to me. “ amphoteric means that it could behave either as an acid or as a base. The alcohol group is not the key in aqueous solution. Terminal Alkynes are acidic”. I don’t see a terminal triple bond.
 

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Nor do I. I assume there must be a mistake in the book. (You have got the right answer book for the right questions, haven't you? Same edition of both?)
 
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mjc123 said:
Nor do I. I assume there must be a mistake in the book. (You have got the right answer book for the right questions, haven't you? Same edition of both?)
Yes, it must be a book mistake. Thank you.
 
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