Question

how can  salt be prepared from from a neutrilization reaction ?????????????????

Answer 1

Soluble Salt can be prepared when insoluble metal oxide and dilute acid is made to react each other.
When acid and alkali are made to react we get salt+water.

Answer 2

When acid is mixed with alkali it will result in Salt and water.
 
      Acid    +     Alkali   ---------------->     Salt       +      Water