pH
Most acidic is substance of pH of 2, then of pH of 5 and the substance of pH 7 is neutral and the substance of pH 11 is basic
No, 7 is neutral. Higher than seven is a base, and lower than 7 is an acid.
No, it's a very weak alkaline. 7 is neutral and is in the middle of the scale.Below 7 is acidic and above 7 are alkaline. :)
No, pH ranges from 0-10 anything below seven is acidic (closer to zero is more acidic) and anything above seven is a base.