Question

Which of the following is known as hydronium ion?

• A. $H{e}^{2+}$
• B. $O{H}^{-}$
• C. $H_3{O}^{+}$
• D. $H^{-}$

Answer 1

The correct option is C $H_3{O}^{+}$

Acids produce hydrogen ions in water but hydrogen ions cannot exist alone. So, they combine with water molecules and exist as hydronium ions $\left(H_3{O}^{+}\right).$

Hence, the correct answer is option (c).