MCQ
A standard hydrogen electrode has zero electrode potential because
- AHydrogen is easiest to oxidise
- ✓The electrode potential is assumed to be zero
- CHydrogen atom has only one electron
- DHydrogen is the lightest element
✓
Answer
Correct option: B.
The electrode potential is assumed to be zero
b
Potential is a relative term i.e. it is always measured with respect to a reference. In electrochemistry, hydrogen is taken to be the reference to measure the potential and hence to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential is declared to be zero volts at all temperatures.
Potential is a relative term i.e. it is always measured with respect to a reference. In electrochemistry, hydrogen is taken to be the reference to measure the potential and hence to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential is declared to be zero volts at all temperatures.
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