Relevant Titles:
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CBSE Class 11 Chemistry MCQs – Pollution and Green Chemistry (NCERT Quiz)
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NCERT MCQs on Environmental Chemistry – Pollution and Green Chemistry
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Class 11 Chemistry Online Test – Pollution and Green Chemistry Practice Questions
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CBSE Board Preparation – Environmental Chemistry MCQs with Answers
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Green Chemistry and Pollution – CBSE Class 11 Chemistry MCQs (NCERT Aligned)
Introduction
Master the key concepts of Pollution and Green Chemistry with this CBSE Class 11 Chemistry MCQ practice test, based on Chapter 14: Environmental Chemistry (Part C: Organic Chemistry). Designed in accordance with the NCERT syllabus, these multiple-choice questions help students understand the causes of environmental pollution, control measures, and the principles of sustainable chemistry.
This quiz emphasizes important topics such as air and water pollution, acid rain, greenhouse effect, photochemical smog, waste management, and the 12 principles of green chemistry — all crucial for the CBSE Class 11 board exams. Each question provides instant feedback with detailed explanations, ensuring conceptual clarity and exam-oriented understanding.
Ideal for both classroom practice and self-study, this online quiz enhances analytical skills and prepares students for higher-level exams like NEET and JEE. These MCQs follow the latest CBSE and NCERT guidelines, making them a perfect tool for revision and board exam preparation.
Sample MCQs (with Answers and Explanations):
Q1. Which gas is the main contributor to the greenhouse effect and global warming?
A) O₂ B) CO₂ C) SO₂ D) NO₂
Answer: B) CO₂
Explanation: Carbon dioxide traps infrared radiation, causing global warming. It is the most significant anthropogenic greenhouse gas.
Q2. Acid rain occurs due to the presence of which gases in the atmosphere?
A) CH₄ and CO₂ B) SO₂ and NO₂ C) CO and O₃ D) H₂ and O₂
Answer: B) SO₂ and NO₂
Explanation: Sulfur dioxide and nitrogen oxides react with water vapor to form acids (H₂SO₄ and HNO₃), leading to acid rain (pH < 5.6).
Q3. Which of the following is not a principle of Green Chemistry?
A) Use of renewable feedstock
B) Atom economy
C) Designing for degradation
D) Use of toxic solvents
Answer: D) Use of toxic solvents
Explanation: Green chemistry promotes the use of safe, biodegradable solvents to minimize toxicity and environmental impact.
Q4. What does “BOD” stand for in the context of water pollution?
A) Basic Oxidation Demand
B) Biochemical Oxygen Demand
C) Biological Organic Density
D) Base Oxygen Data
Answer: B) Biochemical Oxygen Demand
Explanation: BOD measures the oxygen required by microorganisms to decompose organic matter — higher BOD indicates more pollution.
Q5. Which of the following represents an example of green chemistry?
A) Using CFCs as refrigerants
B) Replacing lead-based catalysts with enzymes
C) Dumping chemical waste into rivers
D) Using concentrated acids for cleaning
Answer: B) Replacing lead-based catalysts with enzymes
Explanation: Enzymatic catalysis is eco-friendly, energy-efficient, and reduces toxic by-products, aligning with green chemistry principles.
✅ Highlight: These MCQs are designed strictly as per the NCERT Class 11 Chemistry syllabus, ensuring exam-focused preparation for CBSE Board Examinations.