NEET Chemistry: Electrochemistry — MCQ Test 15

Q6. The molar conductivity of RbCl at infinite dilution is 152.7 S cm\(^2\) mol\(^{-1}\). If \( \lambda^\circ_{Rb^+} = 77.8 \, S \, cm^2 \, mol^{-1} \), what is \( \lambda^\circ_{Cl^-} \)?

Q7. The degree of dissociation of a weak acid is 0.02, and its molar conductivity at infinite dilution is 400 S cm\(^2\) mol\(^{-1}\). What is its molar conductivity at that concentration?

Q8. The dissociation constant of acetic acid is 1.78 × 10\(^{-5}\) mol L\(^{-1}\) at 0.001 M concentration with molar conductivity 48.15 S cm\(^2\) mol\(^{-1}\). What is its \( \Lambda_m^\circ \)?

Q9. A weak acid has \( \Lambda_m^\circ = 380 \, S \, cm^2 \, mol^{-1} \) and \( \Lambda_m = 19 \, S \, cm^2 \, mol^{-1} \) at 0.02 M. What is the dissociation constant \( K_a \)?

Q10. A cell has \( E^\circ_{cell} = 1.10 \, V \) and \( \Delta_r G^\circ = -424600 \, J/mol \) at 298 K. What is the number of electrons transferred? (F = 96500 C/mol)

NEET Chemistry — Electrochemistry

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In a fuel cell with H2_2 and O2_2, what is the cathode reaction?

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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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10
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Key concepts covered in this specific test include Reaction, Electrons, Involved, Reduction, Hydrogen, and Electrode.

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.

In a fuel cell with H2_2 and O2_2, what is the cathode reaction?

  • A.

    2H2+4OH−→4H2O+4e−2H_2 + 4OH^- \rightarrow 4H_2O + 4e^-

  • B.

    2H2O→O2+4H++4e−2H_2O \rightarrow O_2 + 4H^+ + 4e^-

  • C.

    H2+2OH−→2H2O+2e−H_2 + 2OH^- \rightarrow 2H_2O + 2e^-

  • D.

    O2+2H2O+4e−→4OH−O_2 + 2H_2O + 4e^- \rightarrow 4OH^-

Q2.

How many electrons are involved in the reduction of 1 mole of ClO4−ClO_4^- to Cl−Cl^- in acidic medium?

  • A.

    6

  • B.

    8

  • C.

    4

  • D.

    2

Q3.

A hydrogen electrode operates at 298 K with PH2=1.5 atmP_{H_2} = 1.5 \, atm and [H+]=0.0001 M[H^+] = 0.0001 \, M. What is its potential? (Given: EH+/H2∘=0.00 VE^\circ_{H^+/H_2} = 0.00 \, V)

  • A.

    0.00 V

  • B.

    -0.177 V

  • C.

    -0.118 V

  • D.

    -0.2412 V

Q4.

The standard emf of a cell is 0.96 V, and its equilibrium constant at 298 K is 103210^{32}. How many electrons are transferred in the cell reaction?

  • A.

    2

  • B.

    3

  • C.

    1

  • D.

    4

Q5.

What is the emf of the cell $ Cr(s)

Cr^{3+}(0.001 , M)
Cu^{2+}(0.01 , M)

Cu(s) at298K?(Given:at 298 K? (Given: E^\circ_{Cr^{3+}/Cr} = -0.74 , V ,, E^\circ_{Cu^{2+}/Cu} = 0.34 , V $)

  • A.

    1.08 V

  • B.

    1.10 V

  • C.

    1.06033 V

  • D.

    1.02 V

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