Which of the following has highest reduction potential?
Correct answer: C. Au
- A. Zn
- B. Al
- C. Au
- D. Pb
Explanation
Gold (Au) has a high reduction potential, which means it readily gains electrons and is less likely to oxidize. This characteristic makes gold a noble metal, resistant to corrosion and oxidation, unlike zinc (Zn), aluminum (Al), and lead (Pb), which have lower reduction potentials. These metals are more prone to lose electrons and undergo oxidation. Therefore, among the given options, gold has the highest reduction potential.
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Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
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