Physical Chemistry - Electrochemistry

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Q1. The electrochemical series is a list of elements arranged according to their: (2022)

Solution:

The electrochemical series arranges elements based on their standard electrode potentials.

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Q2. Which of the following ions is reduced at the cathode during electrolysis of copper(II) sulfate solution? (2020)

Solution:

Cu²⁺ ions are reduced to copper metal at the cathode during the electrolysis of copper(II) sulfate solution.

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Q3. Which of the following ions is commonly used as a reference electrode? (2020)

Solution:

Silver ions (Ag+) are commonly used in reference electrodes, particularly in silver/silver chloride electrodes.

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Q4. Which of the following statements is true about a galvanic cell? (2020)

Solution:

A galvanic cell converts chemical energy into electrical energy spontaneously.

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Q5. In electrolysis, the process of oxidation occurs at which electrode? (2019)

Solution:

In electrolysis, oxidation occurs at the anode.

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Q6. What is the effect of increasing temperature on the conductivity of an electrolyte solution? (2019)

Solution:

Increasing temperature generally increases the conductivity of an electrolyte solution due to increased ion mobility.

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Q7. In a concentration cell, the electrodes are made of: (2020)

Solution:

In a concentration cell, the electrodes are made of the same metal but have different concentrations of the electrolyte.

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Q8. Which of the following ions is commonly used in a salt bridge? (2020)

Solution:

Potassium ions (K+) are commonly used in salt bridges to maintain electrical neutrality.

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Q9. Which of the following statements is true for a galvanic cell? (2020)

Solution:

A galvanic cell converts chemical energy into electrical energy spontaneously.

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Q10. Which of the following ions is a common spectator ion in electrochemical reactions? (2020)

Solution:

Sodium ion (Na+) is often a spectator ion in many electrochemical reactions.