Which of the following is not the characteristic of a reference electrode? Explanation: The output potential of a reference electrode must be insensitive to the composition of the solution. Explanation: Standard hydrogen electrode is called the primary reference electrode as its output potential is zero volts.

The role of the reference electrode is to provide a stable potential for controlled regulation of the working electrode potential and in doing so allow the measurement of the potential at the working electrode without passing current through it. An ideal reference electrode should also have zero impedance.