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Introduction Paragraph
Understanding oxidation, reduction, and redox reactions is essential for mastering Inorganic Chemistry (Chapter 8: Redox Reactions) in CBSE Class 11 Chemistry. These concepts explain how electrons are transferred during chemical reactions, forming the basis for topics like electrochemistry, corrosion, and oxidation numbers in higher studies.
This online MCQ practice test is designed strictly as per the NCERT Class 11 Chemistry syllabus and follows the CBSE Board exam pattern. It helps students build a strong conceptual foundation in identifying oxidizing and reducing agents, assigning oxidation numbers, and differentiating between redox and non-redox reactions.
Each question includes detailed feedback and correct answers, ensuring conceptual clarity and exam readiness. Perfect for self-study and revision, these MCQs will enhance your understanding and boost confidence for both school exams and competitive exams like JEE and NEET.
Attempt this 30-minute interactive test to test your grasp on oxidation, reduction, and overall redox concepts effectively!
Sample MCQs (with Answers and Explanations)
Q1. Oxidation is defined as:
A) Gain of electrons B) Loss of electrons C) Gain of protons D) Decrease in oxidation number
Answer: B) Loss of electrons
Explanation: Oxidation involves the loss of electrons by an atom or ion, leading to an increase in oxidation number.
Q2. In the reaction Cu + 2Ag⁺ → Cu²⁺ + 2Ag, which species is reduced?
A) Cu B) Ag⁺ C) Cu²⁺ D) Ag
Answer: B) Ag⁺
Explanation: Silver ions (Ag⁺) gain electrons to form metallic silver (Ag), hence undergo reduction.
Q3. The oxidation number of nitrogen in NH₃ is:
A) +3 B) -3 C) +1 D) 0
Answer: B) -3
Explanation: Let x be the oxidation number of N → x + 3(+1) = 0 → x = -3.
Q4. The substance that gets reduced is called:
A) Oxidizing agent B) Reducing agent C) Neutral D) Catalyst
Answer: A) Oxidizing agent
Explanation: The oxidizing agent causes oxidation in another species and is itself reduced by gaining electrons.
Q5. In the reaction 2Fe²⁺ + Cl₂ → 2Fe³⁺ + 2Cl⁻, the oxidizing agent is:
A) Fe²⁺ B) Cl₂ C) Fe³⁺ D) Cl⁻
Answer: B) Cl₂
Explanation: Chlorine gains electrons (reduced) and oxidizes Fe²⁺ to Fe³⁺, thus acting as the oxidizing agent.
✅ Highlight:
These MCQs are based on NCERT Class 11 Chemistry, ensuring 100% syllabus alignment and conceptual coverage — ideal for CBSE board exams and competitive preparation.