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Indian Navy AA (Artificer Apprentice) Electrochemical Series — practice questions

Explore 34 free Electrochemical Series questions in Indian Navy AA (Artificer Apprentice) 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 34.

A device converting CHEMICAL energy to electrical energy via spontaneous redox is a:Read the answer and worked solution →The value of Faraday's constant F is approximately:Read the answer and worked solution →Conductivity of a 0.01 M NaCl solution is 0.0014 S/cm. Molar conductivity Λ_m:Read the answer and worked solution →Electrochemistry deals with:Read the answer and worked solution →Faraday constant F is:Read the answer and worked solution →Time to deposit 1.27 g of Cu from CuSO₄ solution at 2 A current (Cu atomic mass = 63.5):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 Cl₂(g) + 2 KI(aq) → 2 KCl(aq) + I₂(s) is an example of which kind?Read the answer and worked solution →As per your syllabus, the balanced reaction of MnO₄⁻ with Br⁻ in BASIC medium gives MnO₂ and which Br species?Read the answer and worked solution →The standard electrode potential of the Standard Hydrogen Electrode (SHE) is defined as: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 →

Worked practice questions

A device converting CHEMICAL energy to electrical energy via spontaneous redox is a:

  1. Heat engine
  2. Battery charger
  3. Galvanic (voltaic) cell
  4. Electrolytic cell
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Correct answer: C. Galvanic (voltaic) cell

Galvanic cell (also called voltaic cell, e.g. Daniell cell): spontaneous chemical reaction generates electrical current. **Electrolytic cell does the reverse:** electrical energy drives a non-spontaneous reaction.

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The value of Faraday's constant F is approximately:

  1. 9.65 × 10⁴ C/mol
  2. 96.5 C/mol
  3. 1.6 × 10⁻¹⁹
  4. 6.022 × 10²³
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Correct answer: A. 9.65 × 10⁴ C/mol

We have F = N_A × e. That is F = 6.022 × 10²³ × 1.6 × 10⁻¹⁹ C ≈ 96,500 C/mol. So F = 9.65 × 10⁴ C/mol. The charge of one mole of electrons.

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Conductivity of a 0.01 M NaCl solution is 0.0014 S/cm. Molar conductivity Λ_m:

  1. 140 S·cm²/mol
  2. 14 S·cm²/mol
  3. 1400 S·cm²/mol
  4. 1.4 S·cm²/mol
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Correct answer: A. 140 S·cm²/mol

Λ_m = κ × 1000 / c (with c in mol/L). = 0.0014 × 1000 / 0.01 = 140 S·cm²/mol. (Or in SI: κ/c with appropriate unit conversion.)

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