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Indian Navy INET Electrochemical Series — practice questions

Explore 5 free Electrochemical Series questions in Indian Navy INET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Electrochemical Series questions and exercises with answers

Showing questions 1–5 of 5.

For ΔG° < 0 (spontaneous), E° must be:Read the answer and worked solution →Equilibrium constant K of the Daniell cell at 25°C (E° = 1.10 V, n = 2):Read the answer and worked solution →Conductance is the:Read the answer and worked solution →As per your syllabus, oxidation can also be characterised as the addition of which kind of element to a substance?Read the answer and worked solution →The byproduct of a hydrogen-oxygen fuel cell (used in space + electric cars) is:Read the answer and worked solution →

Worked practice questions

For ΔG° < 0 (spontaneous), E° must be:

  1. Positive
  2. Variable
  3. Zero
  4. Negative
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Correct answer: A. Positive

ΔG° = -nFE°. For ΔG° < 0 (spontaneous), we need -nFE° < 0, so E° > 0. Positive cell potential indicates spontaneous galvanic cell.

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Equilibrium constant K of the Daniell cell at 25°C (E° = 1.10 V, n = 2):

  1. ≈ 10²⁰
  2. ≈ 10⁻²
  3. ≈ 10³⁷
  4. ≈ 10²
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Correct answer: C. ≈ 10³⁷

**At equilibrium:** log K = nE°/0.0591 = 2 × 1.10/0.0591 ≈ 37.2. So K ≈ 10³⁷, very large. The forward reaction goes essentially to completion.

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Conductance is the:

  1. Same as resistance
  2. Voltage
  3. Reciprocal of resistance: G = 1/R (siemens)
  4. Current
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Correct answer: C. Reciprocal of resistance: G = 1/R (siemens)

G = 1/R, measured in siemens (S = ohm⁻¹). For ionic solutions, this characterizes ease of charge flow. Specific conductance κ = G × (l/A).

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