Answer is: battery acid, stomach acid, antacid, baking soda and household ammonia.
Battery acid (sulfuric acid) has pH = 0.
Stomach acid (hydrochloric acid) has pH = 1.
pH(household ammonia) = 11.5.
pH = -log[H⁺], approximately the negative of the base 10 logarithm of the molar concentration of hydrogen ions.
[H⁺] = 10∧(-pH).
[H⁺] = 10∧(-11.5).
[H⁺] = 3.16·10⁻¹² M; concentration of hydrogen ions.