Class 9th Chemistry Chapter 3 Exercise MCQs, Short Questions And Long Questions

Understanding the periodic table and its periodicity is fundamental in chemistry. Chapter 3 of Class 9th Chemistry covers these concepts with detailed explanations and solved exercises.

This article focuses on the highlights of the chapter, including exercise questions and their solutions. Whether you are preparing for exams or looking to strengthen your concepts, these notes are a must-have tool.

What Is Covered in These Notes?

These notes comprehensively address the key aspects of Chapter 3, including:

• MCQs: Multiple-choice questions to test your knowledge on periodicity, periodic trends, and classifications.
• Short Questions: Concise explanations of critical topics like ionization energy, atomic radius, and electronegativity.
• Long Questions: In-depth answers to significant questions such as Mendeleev’s contributions and the trends in periodic properties.

The content ensures complete coverage of the syllabus, making it a reliable resource for revision and understanding.

Exercise MCQs, Short Questions, and Long Questions

Exercise MCQs

1. Which of the following decreases along a period?
   • Correct Answer: Atomic radius
     Explanation: Across a period, the atomic radius decreases due to the increased nuclear charge pulling the electrons closer.
2. Which halogen has the lowest electronegativity?
   • Correct Answer: Iodine
     Explanation: As atomic size increases down the group, electronegativity decreases.

Exercise Short Questions

• Why does ionization energy increase across a period?
  • Ionization energy increases across a period due to a higher effective nuclear charge, which tightly binds the electrons to the nucleus.
• What is the shielding effect?
  • The shielding effect refers to the reduction in the nuclear force experienced by outer electrons due to inner electron shells.

Exercise Long Questions

• Discuss Mendeleev’s Periodic Table and its limitations.
  • Mendeleev’s periodic table arranged elements by atomic mass, predicting properties of undiscovered elements. However, it failed to explain isotopes and atomic number relevance, which was later corrected in the modern periodic table.

Tool for Success in Exams

The structured content of these notes ensures success in exams. Each section is tailored to clarify complex concepts and provide practical solutions to exercise questions. This focus on periodic trends, atomic properties, and group behaviors aids in developing a thorough understanding of the subject.

Colored Notes

These notes are designed with color-coded highlights to make studying more engaging and effective. Important definitions, key concepts, and significant points are marked distinctly to ensure easy identification during revision. For instance:

• Blue highlights are used for important terms like “ionization energy” and “electronegativity.”
• Green highlights distinguish critical differences, such as “periods vs. groups.”

This approach not only improves retention but also saves time when revisiting specific topics.

Notes Are Free to Use

One of the best aspects of these notes is their accessibility—they are completely free to use. Students can rely on these resources without worrying about costs, making high-quality educational materials available to everyone. This inclusivity ensures that students from all backgrounds can benefit equally.

Notes Are Mistake-Free

The notes undergo rigorous proofreading to ensure they are error-free. This guarantees the accuracy of the content, whether it’s a definition, formula, or solved question. With zero mistakes, these notes build confidence in students, knowing they are relying on a trustworthy source.

Conclusion

Chapter 3 of Class 9th Chemistry provides foundational knowledge of the periodic table and periodicity of properties. The solved exercises, including MCQs, short questions, and long questions, are invaluable tools for mastering these concepts.

With color-coded highlights, free access, and error-free content, these notes are an essential resource for exam preparation. They not only clarify challenging topics but also empower students to excel academically.

Other Chapters Exercises

• Class 9th Chemistry Chapter 2 Exercise
• Class 9th Chemistry Chapter 1 Exercise
• Class 9th Chemistry Chapter 4 Exercise
• Class 9th Chemistry Chapter 5 Exercise
• Class 9th Chemistry Chapter 6 Exercise
• Class 9th Chemistry Chapter 7 Exercise
• Class 9th Chemistry Chapter 8 Exercise

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