Relevant Titles
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CBSE Class 11 Chemistry – Environmental Chemistry Applications MCQs with Answers
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Online Practice Test: Environmental Chemistry (Applications & Principles)
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Class 11 Chemistry MCQs – Environmental Chemistry for Board Exams
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Top NCERT-Based CBSE Class 11 Chemistry Questions – Environmental Chemistry
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Free CBSE Online Test – Environmental Chemistry Applications MCQs with Solutions
✅ Introduction Paragraph
Prepare for your CBSE Class 11 Chemistry exam with this online MCQ practice test focused on Environmental Chemistry Applications. Designed strictly according to the NCERT Class 11 Chemistry Chapter 14 syllabus, these questions help students understand how chemistry interacts with our environment through real-life applications.
This chapter highlights the importance of waste management, pollution control, green chemistry, and water treatment techniques, which play a vital role in maintaining environmental balance. Each multiple-choice question is crafted to test conceptual clarity and application-based learning — essential for scoring well in CBSE board examinations.
Students can attempt this online quiz to practice environmental concepts such as BOD, COD, biodegradation, phytoremediation, and catalytic converters, along with understanding pollution mitigation methods. Every question includes feedback and explanations for a complete learning experience.
Start this Environmental Chemistry Applications Quiz today to strengthen your understanding of sustainable chemistry and score higher in your board exams!
✅ Sample MCQs (with Answers and Explanations)
Q1. Which process is used to disinfect drinking water in municipal treatment plants?
A) Chlorination
B) Ozonation
C) UV Irradiation
D) All of the above
Answer: D
Explanation: All these methods — chlorination, ozonation, and UV treatment — are effective in killing pathogens and disinfecting water.
Q2. Biochemical Oxygen Demand (BOD) is a measure of:
A) Dissolved oxygen in water
B) Organic matter decomposition by microbes
C) Suspended solids
D) Heavy metal concentration
Answer: B
Explanation: BOD indicates the oxygen required by microorganisms to decompose organic matter, reflecting water pollution level.
Q3. Which gas is released from landfills due to anaerobic decomposition?
A) O₂
B) CO₂
C) CH₄
D) NO₂
Answer: C
Explanation: Anaerobic bacterial decomposition of organic waste in landfills produces methane (CH₄) and carbon dioxide.
Q4. Eutrophication in lakes is primarily caused by:
A) Heavy metals
B) Nutrients like nitrates and phosphates
C) Acid rain
D) Thermal pollution
Answer: B
Explanation: Excess nitrogen and phosphorus in water bodies cause algal blooms, leading to oxygen depletion — eutrophication.
Q5. What is the function of a catalytic converter in vehicles?
A) Convert CO and NOₓ to CO₂ and N₂
B) Produce ozone
C) Reduce fuel efficiency
D) Increase hydrocarbon emission
Answer: A
Explanation: Catalytic converters reduce harmful emissions by converting CO and NOₓ gases into less toxic CO₂ and N₂.