The salt whose aqueous solution will have no effect on either red litmus or blue litmus is

The salt whose aqueous solutio will turn blue litmus to red is:

A solution turns red litmus blue its ph is:

Aqueous solution of which of the following oxides turns blue litmus red?

Phenols turn blue litmus red

The aqueous solution of one of the following satls will turn red litmus to blue. This salt is:

Consider the following salts : Sodium sulphate, Sodium carbonate, Ammonium sulphate The aqueous solution of which of these salts will: turn blue litmus to red ?