PU E 2026 Electrochemistry Free Quiz 3

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PU E 2026 Electrochemistry Free Quiz 3

PU E Quiz

10:00

Answered: 0 / 10

Remaining: 10

Navigator 10 Q

General

General 10 MCQs

21. What is standard electrode potential?

A. Under standard conditions (1 M, 1 atm, 25°C) B. Under non-standard conditions C. At high pressure D. At high temperature

22. What is the reference electrode with E° = 0.00 V?

A. Copper electrode B. Standard hydrogen electrode (SHE) C. Zinc electrode D. Silver electrode

23. What is the standard electrode potential of Zn²⁺/Zn?

A. +0.76 V B. 0.00 V C. -0.76 V D. +0.34 V

24. What is the standard electrode potential of Cu²⁺/Cu?

A. -0.34 V B. 0.00 V C. -0.76 V D. +0.34 V

25. What does a more negative electrode potential indicate?

A. Gain electrons (reduction) B. Lose electrons (oxidation) C. No tendency D. Variable

26. What is the Nernst equation?

A. E = E° - (RT/nF) ln Q B. E = E° + (RT/nF) ln Q C. E = E° - (RT/nF) log Q D. E = E° + (RT/nF) log Q

27. What is the simplified Nernst equation at 25°C?

A. E = E° + (0.0592/n) log Q B. E = E° - (0.0592/n) log Q C. E = E° - (0.0592/n) ln Q D. E = E° + (0.0592/n) ln Q

28. What is the Nernst equation for a concentration cell?

A. E = (0.0592/n) log(C₂/C₁) B. E = -(0.0592/n) ln(C₂/C₁) C. E = -(0.0592/n) log(C₂/C₁) D. E = (0.0592/n) ln(C₂/C₁)

29. What does the Nernst equation show?

A. Independent of concentration B. Only on temperature C. Only on pressure D. Depends on concentration

30. How is the EMF of a cell calculated?

A. E_cell = E_cathode - E_anode B. E_cell = E_anode - E_cathode C. E_cell = E_cathode + E_anode D. E_cell = E_cathode × E_anode

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