Which of the following reactions illustrates an amphoteric compound?
A) 2 HF ? H2F+ + F-
B) NaOH + HBr ? NaBr + H2O
C) 2 H2 + O2 ? 2 H2O
D) All are amphoteric.
E) none of the above
A
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Fill in the blank(s) with the appropriate word(s).
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