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
Correct Answer:
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