It is impossible to measure the actual voltage of any half-cell by itself because:
Correct answer: C. A reaction does not take place on its own
- A. Both half-cell reactions take place simultaneously
- B. Of resistance of the wire
- C. A reaction does not take place on its own
- D. None of the above
Explanation
It is impossible to measure the actual voltage of any half-cell by itself because a reaction does not take place on its own. For a half-cell to generate a measurable voltage, it must participate in a complete redox reaction involving the transfer of electrons. This requires a second half-cell to complete the circuit and allow electron flow. The other options are incorrect because they do not address the fundamental requirement of a redox reaction for voltage measurement.
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