Relevant Titles:
-
CBSE Class 11 Chemistry MCQs – Water, Soil, and Air Pollution (NCERT Quiz)
-
Class 11 Chemistry Practice Test – Environmental Pollution (NCERT Questions)
-
NCERT MCQs on Air, Water, and Soil Pollution – CBSE Class 11 Chemistry
-
CBSE Online Test – Environmental Chemistry: Pollution & Control MCQs
-
Class 11 Chemistry Quiz – Air, Water, and Soil Pollution with Answers
Introduction
Prepare effectively for your CBSE Class 11 Chemistry exams with this NCERT-based practice test on Water, Soil, and Air Pollution from Chapter 14: Environmental Chemistry (Part C: Organic Chemistry). This quiz covers essential environmental chemistry concepts such as air pollutants (CO₂, SO₂, NOₓ, and ozone), acid rain formation, greenhouse gases, eutrophication, and wastewater treatment. It also explores soil contamination, heavy metal toxicity, and strategies to minimize pollution through green chemistry principles.
Each question is carefully aligned with the NCERT syllabus to help you revise key environmental concepts and their real-life implications. Designed for self-assessment, this 30-question timed quiz provides automatic scoring and instant feedback, ensuring a clear understanding of each topic. Whether you’re revising for your CBSE board exams or preparing for entrance tests like NEET or JEE, these multiple-choice questions strengthen both conceptual clarity and application skills. Perfect for students aiming for accuracy, confidence, and top performance in Chemistry.
Sample MCQs (with Answers and Explanations)
Q1. Which gas is mainly responsible for the greenhouse effect and global warming?
A) O₂ B) CO₂ C) SO₂ D) O₃
Answer: B) CO₂
Explanation: Carbon dioxide traps heat in the atmosphere and is the primary greenhouse gas emitted from burning fossil fuels.
Q2. Acid rain occurs due to the presence of which gases in the atmosphere?
A) SO₂ and NO₂ B) CO₂ and CH₄ C) O₃ and CO D) H₂ and O₂
Answer: A) SO₂ and NO₂
Explanation: Sulfur dioxide and nitrogen oxides react with water vapor to form acids (H₂SO₄ and HNO₃), lowering rainwater pH.
Q3. What is the main cause of eutrophication in water bodies?
A) Excess phosphate and nitrate fertilizers
B) Carbon dioxide accumulation
C) High dissolved oxygen levels
D) Heavy metal pollution
Answer: A) Excess phosphate and nitrate fertilizers
Explanation: Fertilizer runoff increases nutrient levels, causing algal blooms and oxygen depletion in aquatic ecosystems.
Q4. Which pollutant is most responsible for the depletion of the ozone layer?
A) CO₂ B) SO₂ C) CFCs D) CH₄
Answer: C) CFCs
Explanation: Chlorofluorocarbons (CFCs) release chlorine radicals that destroy ozone molecules in the stratosphere.
Q5. Which method is used to remove suspended solids during primary sewage treatment?
A) Sedimentation and screening
B) Aeration
C) Chlorination
D) Filtration only
Answer: A) Sedimentation and screening
Explanation: Physical processes like screening and sedimentation remove large suspended solids before biological treatment.
✅ Highlight: These MCQs are designed strictly as per the NCERT Class 11 Chemistry syllabus, making them ideal for CBSE Board exam preparation and conceptual clarity in Environmental Chemistry.