In electrochemical series, elements are arranged in order of their standard electrode potentials, the correct decreasing reactivity order for metals is:
Correct answer: C. Sodium, aluminum, lead, copper
- A. Gold, silver, magnesium, aluminum
- B. Mercury, calcium, sodium, magnesium
- C. Sodium, aluminum, lead, copper
- D. Potassium, silver, magnesium, aluminum
Explanation
In order to learn reactivity we have to memorize the electrochemical series.
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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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