In case of a standard hydrogen electrode ........

General Science (CDS) Chemistry

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In case of a standard hydrogen electrode

absolute electrode potential is not zero

absolute electrode potential is zero

both absolute and standard electrode potential values are zero

electrode potential is zero only at 25 degree C

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Explanation:

The Standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be 4.44 ± 0.02 V at 25 °C, but to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential (E0) is declared to be zero volts only at 298K.