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Which of the following ions is acidic?

Which of the following ions is acidic?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A K+
  • B KNO3-
  • C S2-
  • D H3O+
Correct Answer: Option D
Explanation:
Acids are substances which produces hydrogen ions (or protons) as the only positive ion when dissolved in water.
\(H_{3}O^{+} \to 2H^{+} + OH^{-}\)

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