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

Explore 33 free Electrochemical Series 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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Electrochemical Series questions and exercises with answers

Showing questions 1–30 of 33.

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 →As per your syllabus, in 2Na(s) + H₂(g) → 2NaH(s), the role of hydrogen is which?Read the answer and worked solution →As per your syllabus, MnO₂ is best written as which formula?Read the answer and worked solution →As per your syllabus, the reaction CuSO₄(aq) + Zn(s) → ZnSO₄(aq) + Cu(s) is classified as which type?Read the answer and worked solution →As per your syllabus, eqn 7.40, the reaction 2 H₂O + 2 F₂ → 4 HF + O₂ shows which species being oxidised?Read the answer and worked solution →As per your syllabus, the balanced ionic equation for Cr₂O₇²⁻ + SO₃²⁻ → Cr³⁺ + SO₄²⁻ in acid solution uses how many H⁺ ions on the reactant side?Read the answer and worked solution →As per your syllabus, for a BASIC medium, oxygen balance is achieved by adding which species?Read the answer and worked solution →Match each scientist to their contributionRead the answer and worked solution →Ionic or covalent?Read the answer and worked solution →Complete the driver of bond formationRead the answer and worked solution →Single, double and triple bondsRead the answer and worked solution →True or false: Lewis structuresRead the answer and worked solution →Complete the definition of resonanceRead the answer and worked solution →Tap every bond parameter the chapter namesRead the answer and worked solution →True or false: ionic solidsRead 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 →Bonded pair or lone pair?Read the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the reasoning: why resonance is neededRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →True or false: what bond parameters affectRead the answer and worked solution →Bond parameters in useRead the answer and worked solution →Which parameter answers this?Read the answer and worked solution →True or false: resonanceRead the answer and worked solution →Order the steps: draw a Lewis structureRead 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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