Q1. The Faraday's first law of electrolysis states that: (2018)
Solution:
Faraday's first law states that the mass of a substance deposited at an electrode is directly proportional to the quantity of electricity passed through the electrolyte.
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Q2. Which of the following metals has the highest standard reduction potential? (2019)
Solution:
Gold has the highest standard reduction potential among the given metals.
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Q3. 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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Q4. Which of the following is a characteristic of a reversible cell? (2019)
Solution:
A reversible cell can be recharged, allowing it to be used multiple times.
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Q5. 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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Q6. 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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Q7. In a concentration cell, the two half-cells have: (2019)
Solution:
In a concentration cell, the two half-cells have the same electrodes but different concentrations of the electrolyte.
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Q8. The electrochemical series is a list of: (2023)
Solution:
The electrochemical series is a list of electrodes arranged by their standard electrode potentials, indicating their tendency to gain or lose electrons.
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Q9. 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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Q10. 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.
