Which of the following statements about the standard hydrogen electrode is not correct?

A. The hydrogen gas is at a pressure of 1 atmosphere
B. A solution containing 1 mol dm^-3 of H⁺ (_aq) ions is used
C. A platinum electrode is used
D. The temperature is kept at 20°C

Correct Answer:

Option D = The temperature is kept at 20°C

Explanation

The standard hydrogen electrode consists of hydrogen gas at 25°C