NEET Chemistry: Electrochemistry — MCQ Test 20

Q6. In a dry cell, what is the oxidation state of manganese in the cathode product MnO(OH)?

Q7. How much time (in seconds) is required to deposit 0.635 g of copper from CuSO\(_4\) solution using a current of 0.5 A? (Atomic mass of Cu = 63.5 g/mol, F = 96500 C/mol)

Q8. The resistance of a conductivity cell with 0.02 M NaCl solution is 500 Ω, and its conductivity is 0.0024 S cm\(^{-1}\). What is the cell constant?

Q9. The molar conductivity of a strong electrolyte at infinite dilution is 240 S cm\(^2\) mol\(^{-1}\). If its molar conductivity at 0.01 M is 228 S cm\(^2\) mol\(^{-1}\), what is the degree of dissociation at this concentration?

Q10. The degree of dissociation of a weak electrolyte is 0.05, and its molar conductivity is 19 S cm\(^2\) mol\(^{-1}\). What is its \( \Lambda_m^\circ \)?

NEET ChemistryElectrochemistry

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What is the limiting molar conductivity of CaCl\(_2\) in water at 298 K, given \( \lambda^\circ_{Ca^{2+}} = 119 \, S \, cm^2 \, mol^{-1} \), \( \lambda^\circ_{Cl^-} = 76.3 \, S \, cm^2 \, mol^{-1} \)?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Chemistry preparation, focusing specifically on the chapter Electrochemistry. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Limiting, Conductivity, Reaction, Electrolysis, Electrodes, and Produced.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. What is the limiting molar conductivity of CaCl\(_2\) in water at 298 K, given \( \lambda^\circ_{Ca^{2+}} = 119 \, S \, cm^2 \, mol^{-1} \), \( \lambda^\circ_{Cl^-} = 76.3 \, S \, cm^2 \, mol^{-1} \)?

  • A. 195.3 S cm\(^2\) mol\(^{-1}\)
  • B. 152.6 S cm\(^2\) mol\(^{-1}\)
  • C. 271.6 S cm\(^2\) mol\(^{-1}\)
  • D. 347.9 S cm\(^2\) mol\(^{-1}\)

Q2. In a fuel cell, what is the cathode reaction?

  • A. \( H_2 + 2OH^- \rightarrow 2H_2O + 2e^- \)
  • B. \( O_2 + 2H_2O + 4e^- \rightarrow 4OH^- \)
  • C. \( H_2 \rightarrow 2H^+ + 2e^- \)
  • D. \( O_2 + 4H^+ + 4e^- \rightarrow 2H_2O \)

Q3. What is the emf of a cell \( Zn(s) | Zn^{2+}(0.001 \, M) || H^+(1 \, M) | H_2(g)(1 \, bar) | Pt(s) \) at 298 K? (Given: \( E^\circ_{Zn^{2+}/Zn} = -0.76 \, V \), \( E^\circ_{H^+/H_2} = 0.00 \, V \))

  • A. 0.76 V
  • B. 0.6715 V
  • C. 0.80 V
  • D. 0.8485 V

Q4. In the electrolysis of aqueous K\(_2\)SO\(_4\) with inert electrodes, what gas is produced at the anode?

  • A. H\(_2\)
  • B. SO\(_2\)
  • C. O\(_2\)
  • D. Cl\(_2\)

Q5. A cell operates with \( E_{cell} = 1.50 \, V \) at 298 K when \( [Anode] = 0.001 \, M \) and \( [Cathode] = 0.1 \, M \). If \( E^\circ_{cell} = 1.44 \, V \), what is the reaction quotient \( Q \)?

  • A. 0.1
  • B. 1.0
  • C. 0.001
  • D. 0.01

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