What Is a Redox Reaction? Explained with Examples and Key Concepts
This page offers 20 expertly curated NEET Redox Reactions and Electro MCQ questions, tailored for exam success. Practicing these MCQs boosts your grasp on redox processes and electrochemistry, builds speed, and improves NEET Chemistry accuracy. Use this resource to master essential concepts, clarify doubts, and systematically prepare for your upcoming NEET examination.
What are MCQs for Redox Reactions And Electro MCQ?
NEET Redox Reactions and Electro MCQ practice questions are single-answer, objective problems covering oxidation-reduction reactions and electrochemistry. These MCQs mimic NEET exam format and help you revise n-factor, balancing, cell potential, and application-based principles vital for achieving a high NEET Chemistry score.
Why Practice NEET Redox Reactions And Electro MCQ?
Regular MCQ practice for Redox Reactions and Electro MCQ helps you apply chemical theories, develop logical thinking, and avoid common exam mistakes. It pinpoints weak spots, lets you master high-weightage NEET topics, and improves your ability to solve problems under real exam pressure. Timely revision with Vedantu’s MCQs is key to scoring well in NEET.
Practice MCQs: Redox Reactions And Electro MCQ
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Which statement best describes an oxidation process in a redox reaction?
A. Electrons are gained
B. Electrons are lost
C. Protons are gained
D. Protons are lost
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Which is the oxidation number of oxygen in OF2?
A. +2
B. -1
C. 0
D. -2
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Identify the redox pair from these options:
A. Na/NaCl
B. Fe2+/Fe3+
C. H2O/H+
D. MgSO4/MgO
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Which reaction is NOT a redox process?
A. Na + Cl2 → 2NaCl
B. BaCl2 + Na2SO4 → BaSO4 + 2NaCl
C. CuO + H2 → Cu + H2O
D. Zn + CuSO4 → ZnSO4 + Cu
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In the reaction: 2KBr + Cl2 → 2KCl + Br2, which species is oxidized?
A. K
B. Br-
C. Cl2
D. Br2
-
During rusting, iron acts as:
A. Reducing agent
B. Oxidizing agent
C. Both A and B
D. Neither
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Which compound shows oxygen with a positive oxidation number?
A. H2O
B. Na2O
C. OF2
D. K2O
-
Which element undergoes reduction in 2KBr + Cl2 → 2KCl + Br2?
A. Br
B. K
C. Cl2
D. O2
-
The n-factor of H2O2 in the reaction with NaOCl (forming O2) is:
A. 1
B. 2
C. 4
D. 0
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Which is a displacement type redox reaction?
A. H2 + Cl2 → 2HCl
B. Fe + CuSO4 → FeSO4 + Cu
C. 2KClO3 → 2KCl + 3O2
D. CaCO3 → CaO + CO2
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Which one is a disproportionation reaction?
A. Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
B. 2NO + O2 → 2NO2
C. 2H2O2 → 2H2O + O2
D. H2 + Cl2 → 2HCl
-
In a galvanic cell, the anode is where:
A. Oxidation occurs
B. Reduction occurs
C. Ions are formed
D. No reaction occurs
-
Which statement is INCORRECT regarding standard electrode potential (E°)?
A. A more positive E° means a stronger oxidizing agent
B. E° is measured at 1 M, 1 atm, 25°C
C. E° for H2/H+ is zero
D. E° changes with concentration
-
In the cell Zn | Zn2+ || Cu2+ | Cu, electrons flow from:
A. Cu to Zn
B. Zn to solution
C. Zn to Cu
D. Cu to solution
-
What is the oxidation state of S in SO42-?
A. -2
B. +2
C. +6
D. 0
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Which law governs the quantitative aspects of electrolysis?
A. Avogadro’s Law
B. Faraday’s Law
C. Ohm’s Law
D. Dalton’s Law
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Which has the highest reducing property?
A. F2
B. Cl2
C. Li
D. H2O
-
Electrolysis of aqueous NaCl yields at cathode:
A. Na
B. H2
C. Cl2
D. NaOH
-
In which reaction does H2O2 act as a reducing agent?
A. H2O2 + NaI → I2
B. H2O2 + PbS → PbSO4
C. H2O2 + NaOCl → O2
D. H2O2 + HNO3 → O2
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Cell potential becomes zero when:
A. The cell reaction stops
B. Salt bridge is removed
C. Electrodes are reversed
D. Electrolyte is diluted
-
Which statement about redox reactions is correct?
A. Electrons are transferred
B. Only reduction takes place
C. No change in oxidation number
D. Only oxidation occurs
MCQ Answer Key
| Q.No. | Answer | Explanation |
|---|---|---|
| 1 | B | Oxidation involves loss of electrons by a species. |
| 2 | A | Oxygen in OF₂ has an oxidation number of +2. |
| 3 | B | Fe²⁺/Fe³⁺ is a classic redox pair differing by electron transfer. |
| 4 | B | BaCl₂ + Na₂SO₄ shows no change in oxidation state; not redox. |
| 5 | B | Br⁻ changes from -1 to 0 (oxidized) in the reaction. |
| 6 | A | Iron gives electrons to oxygen, so it acts as a reducing agent. |
| 7 | C | Oxygen is positive (+2) only in OF₂, bonded to more electronegative F. |
| 8 | C | Cl₂ is reduced from 0 to -1 in KCl (gains electrons). |
| 9 | B | For H₂O₂ → O₂, O goes from -1 to 0 so n-factor = 2. |
| 10 | B | Fe displaces Cu from CuSO₄; classic single displacement (redox). |
| 11 | C | In 2H₂O₂ → 2H₂O + O₂, O is both oxidized and reduced (disproportionation). |
| 12 | A | Oxidation always takes place at the anode in a galvanic cell. |
| 13 | D | Standard electrode potential is constant for standard conditions only. |
| 14 | C | Electrons flow from Zn (anode) to Cu (cathode). |
| 15 | C | S in SO₄²⁻: x + 4(-2) = -2 ⇒ x = +6. |
| 16 | B | Faraday’s First and Second Law relate to electrolysis quantities. |
| 17 | C | Li has the lowest standard reduction potential; strongest reducer. |
| 18 | B | Water is reduced at the cathode; hydrogen gas forms in aqueous NaCl electrolysis. |
| 19 | C | H₂O₂ acts as a reducing agent with NaOCl, producing O₂. |
| 20 | A | When equilibrium is reached, reaction stops; E_cell = 0. |
Explanations clarify reasoning behind each answer and help students understand important NEET concepts.
How These MCQs Help in NEET
Solving NEET Redox Reactions and Electro MCQ boosts chemistry accuracy, encourages active recall, and conditions you for timed exams. Detailed reviews expose mistakes and solidify concepts like oxidation numbers, n-factor, cell potential, and reaction types. Consistent MCQ practice using resources like Vedantu’s NEET Chemistry Chapterwise Test or NEET Electrochemistry Practice Questions helps maximize your NEET score.
Tips & Next Steps for NEET Chemistry Success
- Analyze MCQ errors immediately and revise weak concepts in redox or electrochemistry.
- Strengthen fundamentals by practicing more at NEET Chapterwise Practice: Oxidation and NEET Redox Practice Test.
- Attempt NEET Chemistry Previous Year MCQs to spot patterns and frequently asked questions.
- For complete NEET coverage, use NEET Full Syllabus Chemistry Practice Test for simulated exam drills.
Practicing Redox Reactions and Electro MCQ sharpens your Chemistry knowledge and exam confidence. These NEET-style MCQs, with instant answer keys, help you identify gaps and reinforce concepts for top performance. Continue using Vedantu’s MCQ banks and tests to master all NEET Chemistry topics and maximize your future scores.
FAQs on Redox Reactions And Electro MCQ for Students
1. What is the NEET Redox and Electrochemistry MCQ mock test?
The NEET Redox and Electrochemistry MCQ mock test is an online practice tool offering chapterwise multiple-choice questions on redox reactions and electrochemistry as per NEET syllabus. Students can:
- Attempt exam-level Chemistry MCQs with instant scoring
- Receive detailed answer keys and explanations
- Analyze strengths and weaknesses in each topic
- Simulate real NEET exam conditions for redox and electrochemistry topics
2. How many Redox and Electrochemistry MCQs are there in the NEET mock test?
This NEET mock test features a total of 25 multiple-choice questions divided as follows:
- Redox Reactions: 12 MCQs
- Electrochemistry: 8 MCQs
- Mixed/Application Based: 5 MCQs
3. Are these questions based on the current NEET Chemistry syllabus?
Yes, all questions are strictly aligned with the latest NEET Chemistry syllabus, covering essential topics in redox reactions, electrochemistry, Gibbs free energy, Faraday’s laws, and cell potential calculations. The test reflects updated NEET exam patterns and weightage.
4. Can I get instant solutions and explanations for each NEET Mock Test question?
Yes, after submitting the test, you receive instant answer keys with detailed stepwise explanations for every Redox and Electrochemistry MCQ. This includes solution tips, concept clarifications, and error analysis to improve your understanding and test scores.
5. Is the NEET Redox and Electrochemistry MCQ test free to attempt?
The NEET Redox and Electrochemistry MCQ mock test is available for free on Vedantu, providing full access to chapterwise questions, answer keys, and analytics for all NEET Chemistry aspirants.
6. What types of questions are included in the Redox and Electrochemistry NEET mock test?
The test includes
- Balancing redox equations MCQs
- Oxidation number determination questions
- Faraday’s Law numericals
- Electrochemical cell and electrode potential MCQs
- Assertion-reason and application-based questions mimicking NEET trends
7. How is the NEET Redox/Electrochemistry test scored and analyzed?
The test uses actual NEET marking scheme: +4 for each correct answer, -1 for each incorrect answer. After submitting, you get:
- Total score and marks breakdown
- Review of correct and incorrect responses
- Percentile rank among NEET peers
- Topicwise analysis in Redox and Electrochemistry
8. How can I improve my accuracy in redox balancing for NEET MCQs?
To boost redox balancing accuracy in NEET MCQs:
- Regularly practice balancing using half-reaction and ion-electron methods
- Review standard redox pairs and oxidation states
- Attempt timed mock tests focused on redox equations
- Analyze solutions for common errors and learn stepwise approaches
9. Are the Redox and Electrochemistry MCQs similar to previous NEET exam questions?
Yes, the MCQs are carefully curated to match previous NEET Chemistry question trends, including both classic and newly designed problems, so students experience true NEET-exam level difficulty and format.
10. Where can I find more NEET Chemistry mock tests and practice questions?
You can access more NEET Chemistry MCQs and full-length tests on Vedantu, covering subjects like Physical Chemistry, Organic Mechanism, Oxidation MCQs, Previous Year Papers, and Chapterwise Practice Sets to strengthen overall NEET preparation.
11. How close is the difficulty level of this mock test to the actual NEET exam for Redox/Electrochemistry?
The Redox and Electrochemistry MCQ mock test is designed to closely mimic the real NEET exam difficulty, covering all key concepts, competitive MCQ patterns, and case-based/application questions as seen in recent NEET exams.
