Q1. 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.
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Q2. 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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Q3. 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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Q4. 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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Q5. 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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Q6. 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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Q7. 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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Q8. 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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Q9. 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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Q10. 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.
