Write one word term of the following
(i) Water soluble base
(ii) A substance which dissociates on dissolving in water to produce hydrogen ions. `[H^+ (aq) ions]`
(iii) A reaction between an acid and a base to form salt and water.
(iv) A substance which dissociates on dissolving in water to produce hydroxide ions `[OH^(-) ions]`

Explanation

(i) Alkali
(ii) Acid
(iii) Neutralization reaction
(iv) Base