Class 10th Chemistry Chapter 14 Exercise MCQs, Short Questions And Long Questions

Chemistry plays a crucial role in understanding the environment and the challenges it faces today. Chapter 14, Environmental Chemistry – I: The Atmosphere, introduces students to the composition, layers, and significance of the Earth’s atmosphere.

This chapter is essential for grasping environmental concepts and preparing for board exams. With solved exercises, MCQs, short questions, and long questions, these notes are a comprehensive tool for success.

Topics Covered in These Notes

The notes from this chapter focus on:

• Composition of the Atmosphere: Understanding the gases present and their significance.
• Layers of the Atmosphere: Troposphere, stratosphere, mesosphere, and thermosphere.
• Characteristics and Effects: Effects of atmospheric layers on temperature, gases, and life.
• Environmental Chemistry: Significance of pollutants and their effects.
• Solved Exercises: Detailed answers to textbook questions for exam preparation.

Class 10 Chapter 14 Solved Exercise MCQs, Short Questions, and Long Questions

These notes provide an organized and thorough explanation of the key concepts, enabling students to:

• Tackle Multiple Choice Questions (MCQs) related to the atmospheric composition, properties, and pollutants.
• Understand Short Questions like the role of CO2 in greenhouse effects or the functions of the ozone layer.
• Master Long Questions such as detailed explanations of the atmospheric layers or the significance of pollutants and their impact on the environment.

Example MCQs

1. What percentage of the atmosphere is composed of nitrogen?
   • (A) 20.94%
   • (B) 78.09%
   • (C) 0.93%
   • (D) 0.03%
   Correct Answer: (B) 78.09%
2. What is the major reason for ozone depletion?
   • (A) Carbon dioxide
   • (B) Chlorofluorocarbons (CFCs)
   • (C) Oxygen
   • (D) Water vapors
   Correct Answer: (B) Chlorofluorocarbons (CFCs)

Short Questions Highlights

• Q: What are the natural systems of the Earth?
  • A: Earth has four natural systems: lithosphere, hydrosphere, atmosphere, and biosphere.
• Q: How is ozone formed in the stratosphere?
  • A: Ozone forms through the recombination of oxygen atoms (O) and molecules (O2), creating O3 in an exothermic reaction.

Long Questions Explained

• Composition of the Atmosphere: The atmosphere consists primarily of nitrogen (78.09%), oxygen (20.94%), argon (0.93%), and carbon dioxide (0.03%). These gases are essential for sustaining life and regulating temperature.
• Layers of the Atmosphere: The atmosphere is divided into four layers based on temperature variation:
  • Troposphere (0-12 km): Temperature decreases with altitude.
  • Stratosphere (12-50 km): Contains the ozone layer; temperature increases with altitude.
  • Mesosphere (50-85 km): Temperature decreases again.
  • Thermosphere (85-120 km): Temperature increases due to solar radiation.

Tool for Success in Exams

These notes are designed to simplify complex topics and make learning more effective. By following the structured solutions provided:

• Students can quickly grasp difficult concepts.
• Practice exams become easier with MCQs, short, and long question formats.
• Comprehensive coverage ensures no critical topic is left out.

Colored Notes

These notes include color-coded sections to make learning more interactive and visually appealing. Key points, formulas, and diagrams are highlighted to ensure students can easily find and retain essential information.

Notes Are Free to Use

One of the standout features of these notes is their accessibility. Students can access these resources without any cost, making quality education available to everyone. This accessibility encourages more learners to benefit from well-structured, exam-focused content.

Notes Are Mistake-Free

The notes have been meticulously reviewed to ensure they are error-free. Each solution has been verified by experts, so students can confidently rely on them for accurate information. Mistake-free content builds trust and saves valuable time during exam preparation.

Conclusion

Chapter 14 of Class 10 Chemistry introduces crucial environmental concepts that are vital for academic success and practical understanding of our world. These solved notes provide an effective way for students to excel in their exams.

With clear explanations, structured answers, and comprehensive coverage, they serve as a reliable resource for learners aiming to achieve top results.

Other Class 10th Chemistry Exercises

• Class 10th Chemistry Chapter 9 Exercise
• Class 10th Chemistry Chapter 10 Exercise
• Class 10th Chemistry Chapter 11 Exercise
• Class 10th Chemistry Chapter 12 Exercise
• Class 10th Chemistry Chapter 13 Exercise
• Class 10th Chemistry Chapter 15 Exercise
• Class 10th Chemistry Chapter 16 Exercise

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