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Physical Chemistry - Electrochemistry

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Q. In a concentration cell, the electrodes are made of: (2020)
  • A. Different metals
  • B. Same metal but different concentrations
  • C. Same metal and same concentration
  • D. Different electrolytes
Q. In a concentration cell, the two half-cells have: (2019)
  • A. Different electrodes
  • B. Same electrodes but different concentrations
  • C. Same concentrations
  • D. Different temperatures
Q. In an electrochemical cell, the anode is where: (2019)
  • A. Oxidation occurs
  • B. Reduction occurs
  • C. Electrons are gained
  • D. Ions are produced
Q. In electrolysis, the process of oxidation occurs at which electrode? (2019)
  • A. Anode
  • B. Cathode
  • C. Both electrodes
  • D. None of the above
Q. The electrochemical series is a list of elements arranged according to their: (2022)
  • A. Atomic mass
  • B. Electronegativity
  • C. Standard electrode potentials
  • D. Ionization energy
Q. The electrochemical series is a list of: (2023)
  • A. Reactions
  • B. Electrodes arranged by standard electrode potential
  • C. Ionic compounds
  • D. Gases
Q. The Faraday's first law of electrolysis states that: (2018)
  • A. The mass of substance deposited is directly proportional to the current
  • B. The voltage is directly proportional to the current
  • C. The energy is conserved
  • D. The temperature remains constant
Q. What is the effect of increasing temperature on the conductivity of an electrolyte solution? (2019)
  • A. Increases conductivity
  • B. Decreases conductivity
  • C. No effect
  • D. Depends on the electrolyte
Q. Which of the following ions is a common spectator ion in electrochemical reactions? (2020)
  • A. Na+
  • B. Cl-
  • C. Ag+
  • D. Cu2+
Q. Which of the following ions is commonly used as a reference electrode? (2020)
  • A. Ag+
  • B. Cl-
  • C. K+
  • D. Hg2+
Q. Which of the following ions is commonly used in a salt bridge? (2020)
  • A. Na+
  • B. Cl-
  • C. K+
  • D. Ca2+
Q. Which of the following ions is reduced at the cathode during electrolysis of copper(II) sulfate solution? (2020)
  • A. Cu²⁺
  • B. SO₄²⁻
  • C. H⁺
  • D. OH⁻
Q. Which of the following is a characteristic of a reversible cell? (2019)
  • A. It can be recharged
  • B. It cannot be recharged
  • C. It has a fixed voltage
  • D. It operates at constant temperature
Q. Which of the following metals has the highest standard reduction potential? (2019)
  • A. Gold
  • B. Silver
  • C. Copper
  • D. Zinc
Q. Which of the following statements is true about a galvanic cell? (2020)
  • A. It converts chemical energy to electrical energy
  • B. It requires an external power source
  • C. It is always non-spontaneous
  • D. It operates at constant temperature only
Q. Which of the following statements is true for a galvanic cell? (2020)
  • A. It converts chemical energy to electrical energy
  • B. It requires an external power source
  • C. It is always non-spontaneous
  • D. It operates at constant temperature only
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Physical Chemistry - Electrochemistry MCQ & Objective Questions

Physical Chemistry, particularly the branch of Electrochemistry, plays a crucial role in various examinations. Understanding this subject not only enhances your conceptual clarity but also boosts your confidence in tackling objective questions. Practicing MCQs and important questions in Electrochemistry can significantly improve your exam scores, making it essential for effective exam preparation.

What You Will Practise Here

  • Fundamental concepts of electrochemical cells and their types.
  • Key definitions such as electrode potential, standard electrode potential, and Nernst equation.
  • Understanding of galvanic and electrolytic cells, including their working principles.
  • Calculation of cell potential and its relation to Gibbs free energy.
  • Applications of electrochemistry in real-world scenarios, such as batteries and corrosion.
  • Diagrams illustrating electrochemical processes and cell configurations.
  • Important Physical Chemistry - Electrochemistry questions for exams, including numerical problems.

Exam Relevance

Electrochemistry is a significant topic in CBSE, State Boards, NEET, and JEE examinations. Questions often focus on theoretical concepts, numerical calculations, and application-based scenarios. Common patterns include direct MCQs, assertion-reason type questions, and numerical problems that require a solid understanding of the Nernst equation and cell potentials. Mastering this topic can give you an edge in competitive exams.

Common Mistakes Students Make

  • Confusing galvanic cells with electrolytic cells and their functions.
  • Misapplying the Nernst equation in numerical problems.
  • Overlooking the significance of standard electrode potentials in calculations.
  • Failing to interpret electrochemical diagrams correctly.

FAQs

Question: What is the Nernst equation used for?
Answer: The Nernst equation is used to calculate the cell potential under non-standard conditions.

Question: How do galvanic and electrolytic cells differ?
Answer: Galvanic cells generate electrical energy from spontaneous reactions, while electrolytic cells use electrical energy to drive non-spontaneous reactions.

Now is the time to enhance your understanding of Physical Chemistry - Electrochemistry! Dive into our practice MCQs and test your knowledge to excel in your exams. Remember, consistent practice is the key to success!

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