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Indian Navy 10+2 B.Tech Cadet Electrochemistry — practice questions

Explore 28 free Electrochemistry questions in Indian Navy 10+2 B.Tech Cadet 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 1–28 of 28.

Relation between standard cell potential E°, ΔG°, and equilibrium constant K:Read the answer and worked solution →Standard electrode potential of SHE (Standard Hydrogen Electrode) is taken as:Read the answer and worked solution →How many coulombs are needed to deposit 1 mole of Cu from CuSO₄ (Cu²⁺ + 2e⁻ → Cu)?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

Relation between standard cell potential E°, ΔG°, and equilibrium constant K:

  1. ΔG° = E°/n
  2. ΔG° = -RT/F
  3. ΔG° = -nFE° = -RT ln K
  4. ΔG° = nFE° = RT ln K
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Correct answer: C. ΔG° = -nFE° = -RT ln K

ΔG° = -nFE° (relates ΔG° to electrochemistry) and ΔG° = -RT ln K (relates to thermodynamic equilibrium). **So nFE° = RT ln K. Useful for predicting spontaneity and K from cell potentials.**

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Standard electrode potential of SHE (Standard Hydrogen Electrode) is taken as:

  1. 0 V
  2. Variable
  3. -1.0 V
  4. +1.0 V
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Correct answer: A. 0 V

**SHE is defined as the reference:** E°(SHE) = 0 V by convention. All other electrode potentials are measured relative to it. 2H+ (1 M) + 2e- → H2 (1 atm) at 25°C, with Pt electrode.

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How many coulombs are needed to deposit 1 mole of Cu from CuSO₄ (Cu²⁺ + 2e⁻ → Cu)?

  1. 48250 C
  2. 2 × 96500 = 193000 C
  3. 0
  4. 96500 C
Show answer and solution

Correct answer: B. 2 × 96500 = 193000 C

Cu²⁺ + 2e⁻ → Cu requires 2 moles of electrons = 2F = 193000 C per mole of Cu. Faraday's law in action.

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