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Physical Chemistry - Redox Reactions

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Q. What is the primary product when potassium permanganate (KMnO4) is reduced in acidic medium? (2019)
  • A. MnO2
  • B. Mn2+
  • C. MnO4-
  • D. KMnO4
Q. What is the product of the reduction of Cr2O7²⁻ in acidic medium? (2019)
  • A. CrO4²⁻
  • B. Cr³⁺
  • C. Cr²O3
  • D. CrO2
Q. What is the product of the reduction of permanganate ion (MnO4-) in acidic medium? (2019)
  • A. MnO2
  • B. Mn2O3
  • C. Mn2+
  • D. MnO4
Q. What is the role of an oxidizing agent in a redox reaction? (2020)
  • A. It gains electrons
  • B. It loses electrons
  • C. It remains unchanged
  • D. It increases the temperature
Q. What is the role of MnO4⁻ in acidic medium during redox reactions? (2020)
  • A. Oxidizing agent
  • B. Reducing agent
  • C. Neutral agent
  • D. Catalyst
Q. What is the standard reduction potential of a half-reaction? (2022)
  • A. The tendency to gain electrons
  • B. The tendency to lose electrons
  • C. The energy released during oxidation
  • D. The energy absorbed during reduction
Q. What is the standard reduction potential of the half-reaction Cu2+ + 2e- → Cu? (2022)
  • A. +0.34 V
  • B. +0.76 V
  • C. -0.34 V
  • D. -0.76 V
Q. What is the standard reduction potential of the half-reaction Fe^3+ + 3e- → Fe? (2022)
  • A. +0.77 V
  • B. +0.44 V
  • C. -0.77 V
  • D. -0.44 V
Q. Which of the following is an example of an oxidation reaction? (2020)
  • A. 2H2 + O2 → 2H2O
  • B. C + O2 → CO2
  • C. Fe + CuSO4 → FeSO4 + Cu
  • D. Na + Cl2 → NaCl
Q. Which of the following is the oxidizing agent in the reaction: 2MnO4⁻ + 5C2O4²⁻ + 6H⁺ → 2Mn²⁺ + 10CO2 + 3H2O? (2022)
  • A. MnO4⁻
  • B. C2O4²⁻
  • C. H⁺
  • D. CO2
Q. Which of the following reactions is an example of a disproportionation reaction? (2023)
  • A. 2H2O2 → 2H2O + O2
  • B. 2Na + Cl2 → 2NaCl
  • C. Zn + CuSO4 → ZnSO4 + Cu
  • D. Fe + 2HCl → FeCl2 + H2
Q. Which of the following reactions is an example of a redox reaction? (2023)
  • A. H2 + Cl2 → 2HCl
  • B. NaOH + HCl → NaCl + H2O
  • C. CaCO3 → CaO + CO2
  • D. C + O2 → CO2
Q. Which of the following species can act as an oxidizing agent? (2023)
  • A. Na+
  • B. Cl-
  • C. H2O
  • D. MnO4-
Q. Which of the following species is oxidized in the reaction 2Na + Cl2 → 2NaCl? (2023)
  • A. Na
  • B. Cl2
  • C. NaCl
  • D. None
Q. Which of the following species is the strongest oxidizing agent? (2023)
  • A. F2
  • B. Cl2
  • C. Br2
  • D. I2
Showing 31 to 45 of 45 (2 Pages)

Physical Chemistry - Redox Reactions MCQ & Objective Questions

Understanding "Physical Chemistry - Redox Reactions" is crucial for students preparing for school and competitive exams in India. This topic not only forms a significant part of the syllabus but also helps in developing a strong conceptual foundation. Practicing MCQs and objective questions on redox reactions enhances your exam readiness and boosts your confidence, allowing you to tackle important questions effectively.

What You Will Practise Here

  • Definition and significance of redox reactions
  • Oxidation and reduction processes with examples
  • Balancing redox reactions using half-reaction method
  • Standard electrode potentials and their applications
  • Electrochemical cells and their functioning
  • Applications of redox reactions in real-life scenarios
  • Common redox reaction equations and their derivations

Exam Relevance

The topic of redox reactions is frequently featured in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that require them to identify oxidizing and reducing agents, balance chemical equations, and apply concepts to solve numerical problems. Common question patterns include direct MCQs, assertion-reason type questions, and application-based scenarios that test conceptual understanding.

Common Mistakes Students Make

  • Confusing oxidation with reduction due to similar terminologies
  • Neglecting to balance charges and atoms in redox equations
  • Overlooking the significance of standard electrode potentials
  • Misinterpreting the role of catalysts in redox reactions

FAQs

Question: What are redox reactions?
Answer: Redox reactions are chemical processes that involve the transfer of electrons between two substances, resulting in changes in their oxidation states.

Question: How can I effectively balance redox reactions?
Answer: You can balance redox reactions using the half-reaction method, which involves separating the oxidation and reduction processes and balancing them individually.

Now is the time to enhance your understanding of "Physical Chemistry - Redox Reactions". Solve practice MCQs and test your knowledge to ensure you are well-prepared for your exams. Remember, consistent practice leads to success!

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