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NCERT Solutions › Chemistry › Chapter 14

Chapter 14: Environmental Chemistry

NCERT Solutions for CBSE Class 10 Chemistry — 8 solved questions with detailed explanations.

8
Questions
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Topics

Solved Questions

Q1. The main cause of ozone depletion is:

Difficulty: Easy · Topic: Ozone Layer

Solution

Chlorofluorocarbons (CFCs) release Cl radicals in the stratosphere that catalytically destroy ozone.

Q2. BOD stands for:

Difficulty: Easy · Topic: Water Pollution

Solution

BOD (Biochemical Oxygen Demand) measures the amount of dissolved oxygen consumed by microorganisms to decompose organic matter.

Q3. Acid rain has pH less than:

Difficulty: Easy · Topic: Environmental Chemistry

Solution

5.6.

Q4. The greenhouse effect is caused by:

Difficulty: Easy · Topic: Environmental Chemistry

Solution

CO₂, CH₄, N₂O trapping IR radiation.

Q5. DDT is a:

Difficulty: Easy · Topic: Environmental Chemistry

Solution

non-biodegradable pesticide.

Q6. Biological magnification means:

Difficulty: Easy · Topic: Environmental Chemistry

Solution

increase in concentration along food chain.

Q7. London smog is a mixture of:

Difficulty: Easy · Topic: Environmental Chemistry

Solution

smoke and fog (reducing).

Q8. Photochemical smog contains:

Difficulty: Easy-Medium · Topic: Air Pollution

Solution

Photochemical smog (Los Angeles type) contains ozone, PAN (peroxyacetyl nitrate), and other oxidants.

Other Chapters in Chemistry

Ch 1: Some Basic ConceptsCh 2: Structure of AtomCh 3: Classification of ElementsCh 4: Chemical BondingCh 5: States of MatterCh 6: ThermodynamicsCh 7: EquilibriumCh 8: Redox ReactionsCh 9: HydrogenCh 10: s-Block ElementsCh 11: p-Block ElementsCh 12: Organic ChemistryCh 13: Hydrocarbons

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