Which is neutral to litmus?

A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dil. HNO_(3) . The anion could be :

A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the aforementioned solution, a white precipitate is obtained which does not dissolved in dil. nitric acid. The anion is :

Why salt of strong acid and strong base does not undergo hydrolysis or is neutral to litmus?

The substance that is neutral to litmus

Water is neutral of litmus paper. This is because in water ?