Neco Model Questions Vol1 2020 Chemistry Question 47

Practice objective / multiple choice question 47 from the 2020 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 47 NECO_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective

A galvanic cell is constructed as follows: Zn(s) | Zn²⁺ (0.010 M) || Cu²⁺ (0.10 M) | Cu(s). Standard electrode potentials are E°(Zn²⁺/Zn) = -0.76 V and E°(Cu²⁺/Cu) = +0.34 V. At 25 °C, (i) calculate the cell potential, (ii) state the direction of the spontaneous reaction, and (iii) determine the equilibrium constant for the overall cell reaction.

Answer Options

A. (i) 0.58 V, (ii) Zn oxidises and Cu²⁺ reduces (as written), (iii) K ≈ 1.5 × 10^{37}
Correct Answer B. (i) 1.13 V, (ii) Zn oxidises and Cu²⁺ reduces (as written), (iii) K ≈ 1.5 × 10^{37}
C. (i) 1.13 V, (ii) Cu oxidises and Zn²⁺ reduces, (iii) K ≈ 1.5 × 10^{37}
D. (i) 1.13 V, (ii) Zn oxidises and Cu²⁺ reduces (as written), (iii) K ≈ 2.3 × 10^{20}
Correct Answer
B
Correct Option:
(i) 1.13 V, (ii) Zn oxidises and Cu²⁺ reduces (as written), (iii) K ≈ 1.5 × 10^{37}

About This Question

This is Neco Model Questions Vol1 2020 Chemistry Question 47. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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