Question

The two ions which are formed when ammonia dissolves in water are ammonium ion and ___________ .

• A. ${OH}^{-}$
• B. ${H_{3}O}^{+}$
• C. $H^{+}$
• D. $O^{-2}$

Answer 1

The correct option is A ${OH}^{-}$

Ammonia readily dissolves in water with the liberation of heat. The ions which are formed are ammonium ion and hydroxyl ion. The aqueous solution of ammonia is ammonium hydroxide.
${NH}_3+H_{2}O\rightleftharpoons {NH}_4^{+}+{OH}^{-}$