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CBSE Class 11 Chemistry MCQs: Oxidizing and Reducing Agents – NCERT Practice Test
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NCERT Class 11 Chemistry Practice Questions – Oxidizing and Reducing Agents
Introduction Paragraph
Understanding oxidizing and reducing agents is a key concept in Inorganic Chemistry (Chapter 8: Redox Reactions) for CBSE Class 11 students. These agents play a vital role in chemical reactions, where oxidation involves the loss of electrons and reduction involves the gain of electrons. Recognizing which substances act as oxidizers or reducers helps students balance redox equations and predict reaction outcomes.
This online MCQ practice test is carefully designed as per the NCERT Class 11 Chemistry syllabus and aligns with the latest CBSE Board exam pattern. The questions cover fundamental examples of common oxidizing agents like KMnO₄, K₂Cr₂O₇, H₂O₂, and reducing agents like Zn, CO, and H₂. Each question includes detailed feedback, making it ideal for conceptual learning, board exam revision, and competitive exam preparation (JEE/NEET).
Attempt this 30-question interactive quiz to master redox behavior and strengthen your grasp on oxidation and reduction reactions effectively!
Sample MCQs (with Answers and Explanations)
Q1. Which of the following is the strongest oxidizing agent?
A) F₂ B) Cl₂ C) Br₂ D) I₂
Answer: A) F₂
Explanation: Fluorine has the highest electronegativity and electron affinity, making it the strongest oxidizing agent among halogens.
Q2. Which of the following acts as a reducing agent in redox reactions?
A) KMnO₄ B) Zn C) HNO₃ D) Cl₂
Answer: B) Zn
Explanation: Zinc readily loses electrons to form Zn²⁺ ions, thereby reducing other species — a classic example of a reducing agent.
Q3. In acidic medium, the oxidizing agent in the reaction MnO₄⁻ → Mn²⁺ is:
A) KMnO₄ B) Mn²⁺ C) H₂SO₄ D) H₂O₂
Answer: A) KMnO₄
Explanation: Permanganate ions in acidic solution act as strong oxidizing agents, getting reduced to Mn²⁺.
Q4. Which reagent is commonly used as a reducing agent in laboratory redox reactions?
A) NaBH₄ B) H₂O₂ C) K₂Cr₂O₇ D) Cl₂
Answer: A) NaBH₄
Explanation: Sodium borohydride (NaBH₄) donates hydride ions, reducing aldehydes and ketones to alcohols in organic redox reactions.
Q5. Which of the following is both an oxidizing and a reducing agent?
A) H₂O₂ B) NaCl C) CO₂ D) SO₂
Answer: A) H₂O₂
Explanation: Hydrogen peroxide can act as both oxidizer and reducer — it undergoes disproportionation under suitable conditions.
✅ Highlight:
These MCQs are designed strictly as per the NCERT Class 11 Chemistry syllabus, making them ideal for CBSE Board exam preparation and competitive exam practice.