Question

Which are true for a standard hydrogen electrode?

• A. The hydrogen ion concentration is 1 M
• B. Temperature is 25${}^o$C
• C. Pressure of hydrogen is 1 bar
• D. It contains a metallic conductor which does not absorb hydrogen

Answer 1

Answer: (A), (B), (C)

The correct options are
A Temperature is 25${}^o$C
B Pressure of hydrogen is 1 bar
C The hydrogen ion concentration is 1 M

The standard hydrogen electrode has the hydrogen ion concentration of 1 M.
It operates at a temperature of ${25}^{0}C$ and the pressure of 1 bar.
Thus, the options A to C are correct.
It contains a metallic conductor (platinium electrode) which absorb hydrogen.
Thus, the option D is incorrect.