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Question

Which are true for a standard hydrogen electrode?

A
The hydrogen ion concentration is 1 M
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B
Temperature is 25oC
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C
Pressure of hydrogen is 1 bar
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D
It contains a metallic conductor which does not absorb hydrogen
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Solution

The correct options are
A Temperature is 25oC
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 250C 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.

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