Numericals in chemistry form the backbone of understanding critical concepts. Chapter 5 of Class 9th Chemistry delves into the Physical States of Matter, supported by exercise numericals to strengthen problem-solving skills.
This article focuses on the solved Numericals Of Chemistry Chapter 5, providing students with an invaluable resource for exam preparation. Mastering these numerical ensures clarity in topics like pressure, volume, and gas laws.
Class 9th Chemistry Chapter 5 Exercise Numericals With Solutions
1. Conversion of Units
Example 1: Convert 850 mmHg to atm.
Solution:
- Formula:
1 atm = 760 mmHg 850 mmHg = 850 / 760 = 1.12 atm
Example 2: Convert 205,000 Pa to atm.
Solution:
- Formula:
1 atm = 101,325 Pa 205,000 Pa = 205,000 / 101,325 = 2.02 atm
2. Applying Boyle’s Law
Example 1: A gas at a pressure of 912 mmHg occupies 450 cm3. What will be its volume at 0.4 atm?
Solution:
- Convert
912 mmHgto atm:912 mmHg = 912 / 760 = 1.2 atm - Using
P1V1 = P2V2: 1.2 * 450 = 0.4 * V2V2 = (1.2 * 450) / 0.4 = 1350 cm3
Example 2: A gas occupies 800 cm3 at 1 atm. If allowed to expand to 1200 cm3, find its pressure in mmHg.
Solution:
- Using
P1V1 = P2V2: 1 * 800 = P2 * 1200P2 = 800 / 1200 = 0.667 atm- Convert
0.667 atmto mmHg:760 * 0.667 = 506.92 mmHg
These numericals provide clear applications of Boyle’s Law and unit conversions essential for understanding gas behavior.
Tool for Success in Exams
Practicing these solved numericals sharpens analytical thinking and problem-solving abilities. With clarity in basic concepts and sufficient practice, students can confidently tackle any question on Physical States of Matter in their exams.
Colored Notes
The notes for Chapter 5 include well-structured, visually appealing content to enhance learning. Key points are highlighted in different colors, aiding students in focusing on the most important information.
These color-coded notes make studying efficient by categorizing essential definitions, formulas, and examples separately, ensuring a better grasp of the content.
Notes Are Free to Use
The comprehensive notes, including solved numericals, MCQs, and theoretical explanations, are accessible without any cost. Students can freely use them for self-study or group discussions.
This accessibility ensures that every learner, regardless of resources, can excel in their understanding of Physical States of Matter.
Notes Are Mistake-Free
Every solved numerical and theoretical explanation has been carefully verified for accuracy. The notes are meticulously designed to eliminate errors, ensuring students rely on them with confidence. From unit conversions to law applications, every detail has been double-checked to guarantee correctness.
Conclusion
Understanding Physical States of Matter becomes straightforward with these comprehensive notes. The solved numericals reinforce concepts like gas laws and unit conversions, ensuring students excel in exams.
With their accurate, mistake-free, and visually appealing format, these notes provide an invaluable resource for mastering Chapter 5.
Other Class 9th Chemistry Exercise Numericals
FAQs
Why are solved numericals essential in chemistry?
Solved numericals help in applying theoretical concepts to practical problems, enhancing comprehension and exam preparation.
Can these notes help with competitive exams?
Yes, these notes are detailed and cover fundamental concepts, making them useful for both school exams and competitive tests.
Are the notes available for download?
Yes, Students can download and use these notes for better learning and revision.