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Indian Navy SSR (Sailor) Electrochemistry — practice questions

Explore 29 free Electrochemistry questions in Indian Navy SSR (Sailor) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Electrochemistry questions and exercises with answers

Showing questions 1–29 of 29.

In a galvanic cell, electrons flow externally from:Read the answer and worked solution →Kohlrausch's law states the limiting molar conductivity of an electrolyte is:Read the answer and worked solution →Equilibrium constant for cell with E° = 0.118 V, n = 2, at 25°C:Read the answer and worked solution →Standard reduction potential ranking. Which is the strongest oxidizing agent?Read the answer and worked solution →Galvanic cell or electrolytic cell?Read the answer and worked solution →Complete the standard cell potential relationRead the answer and worked solution →Order these electrodes by standard potential, lowest firstRead the answer and worked solution →Match each electrode to the potential your syllabus givesRead the answer and worked solution →True or false: conductivity on dilutionRead the answer and worked solution →Strong electrolyte or weak electrolyte?Read the answer and worked solution →Kohlrausch's lawRead the answer and worked solution →Match each relation to what it linksRead the answer and worked solution →True or false: cells and electrodesRead the answer and worked solution →Tap every statement true of a galvanic cellRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Complete the thermodynamic linksRead the answer and worked solution →What the Nernst equation is forRead the answer and worked solution →Which quantity is being described?Read the answer and worked solution →True or false: batteries, fuel cells and corrosionRead the answer and worked solution →Order the steps: find a standard cell potentialRead the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every factor conductivity depends onRead the answer and worked solution →Assertion and reason: potentialsRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →Complete the dilution behaviourRead the answer and worked solution →True or false: the standard scaleRead the answer and worked solution →

Worked practice questions

In a galvanic cell, electrons flow externally from:

  1. Both directions equally
  2. Cathode to anode
  3. Anode to cathode
  4. Either depending on circuit
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Correct answer: C. Anode to cathode

**In external circuit:** electrons flow from anode (oxidation, source of electrons) to cathode (reduction, sink). Conventional current is opposite (cathode to anode externally).

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Kohlrausch's law states the limiting molar conductivity of an electrolyte is:

  1. Always equal
  2. Sum of individual ionic limiting conductivities
  3. Product of conductivities
  4. Variable with concentration
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Correct answer: B. Sum of individual ionic limiting conductivities

**Kohlrausch's law:** Λ_m^0(electrolyte) = ν+ λ+^0 + ν- λ-^0, where ν+ and ν- are cation and anion stoichiometries. Λ_m^0(HCl) = λ_H+^0 + λ_Cl-^0.

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Equilibrium constant for cell with E° = 0.118 V, n = 2, at 25°C:

  1. 10
  2. 10⁴ = 10000 (log K = 2 × 0.118 / 0.0591 ≈ 4)
  3. 10² = 100
  4. 1
Show answer and solution

Correct answer: B. 10⁴ = 10000 (log K = 2 × 0.118 / 0.0591 ≈ 4)

log K = nE°/0.0591 = 2 × 0.118/0.0591 ≈ 3.99 ≈ 4. K ≈ 10⁴.

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