These may seem like strange questions.
1) What is the real definition of neutralisation if these reactions are considered neutralisation reactions ?
A)Sodium hydroxide and hydrochloric acid (salt and water product, pH7)
B) ammonia and hydrochloric acid in solution ( Salt formed but is a weak acid, no water and pH below 7)
C) ammonia and hydrogen chloride gas ( solid Salt formed that would be a a weak acid in solution )
a) secondly, are all acid base reactions neutralisation reaction or are neutralisation reactions a subgroup of acid base reactions?
B) Can you consider Na2O + H2O -> 2NaOH a neutralisation reaction because Na2O is the base and Water is the acid?