What value on the pH scale is considered neutral?

Answer: B — 7

On the pH scale, acidity and basicity come from the hydrogen ion concentration in a solution. The neutral point is reached when the concentrations of hydrogen ions and hydroxide ions are equal. In water at room temperature, that equality happens at about 1×10^−7 M for each ion, which makes the pH equal to −log10(1×10^−7) = 7. So seven is the neutral value. Values below seven indicate acidity (with zero being very strongly acidic), while values above seven indicate basicity (with fourteen being very strongly basic).