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Daily Practice Problems
Class 11 Physics
Kinetic Theory
daily practice problem

Question 1.

What do you understand by ‘Mean free path’?

Question 2.

A nitrogen container of volume 45 litres has an initial gauge pressure of 20 atm and a temperature of 30 °C. After some nitrogen is withdrawn from the container, the gauge pressure drops to 15 atm and its temperature drops to 15 °C. Estimate the mass of nitrogen taken out of the container (R = 8.31 J mol–1 K–1, molecular mass of N2 = 28 u).

Question 3.

What is Avogadro’s hypothesis?

Question 4.

A vessel contains two non-reactive gases: neon (monatomic) and oxygen (diatomic). The ratio of their partial pressures is 5:3. Estimate the ratio of (i) number of molecules and (ii) mass density of neon and oxygen in the vessel. Atomic mass of Ne = 20.2 u, molecular mass of O2 = 32.0 u.

Question 5.

Give ideal gas equation.

Question 6.

A flask contains argon and chlorine in the ratio of 3:2 by mass. The temperature of the mixture is 25 °C. Obtain the ratio of (i) average kinetic energy per molecule, and (ii) root mean square speed vrms of the molecules of the two gases. Atomic mass of argon = 39.9 u; Molecular mass of chlorine = 70.9 u.

Question 7.

An air bubble of volume 1.5 cm3 rises from the bottom of a lake 50 m deep at a temperature of 15 °C. To what volume does it grow when it reaches the surface, which is at a temperature of 30 °C?

Question 8.

What do you mean by kinetic interpretation of temperature?

Question 9.

What is the relation between specific heat capacities of monatomic gases?

Question 10.

Write down the specific heat capacities for diatomic gases.

Question 11.

A cylinder of fixed capacity 44.8 litres contains helium gas at standard temperature and pressure. What is the amount of heat needed to raise the temperature of the gas in the cylinder by 25.0 °C? (R = 8.31 J mol–1 K–1).

Question 12.

What do law of equipartition of energy states?

Question 13.

What is the ratio of cp and cv for polyatomic gases?

Question 14.

Give formula for specific heat capacity for solids.

Question 15.

A metre long narrow bore held horizontally (and closed at one end) contains a 80 cm long mercury thread, which traps a 12 cm column of air. What happens if the tube is held vertically with the open end at the bottom?

Question 16.

Estimate the mean free path and collision frequency of an oxygen molecule in a cylinder containing oxygen at 3.0 atm and temperature 150C. Take the radius of an oxygen molecule to be roughly 1.05 Å. Compare the collision time with the time the molecule moves freely between two successive collisions (Molecular mass of O2 = 32.0 u).

Question 17.

Estimate the average thermal energy of a helium atom at the temperature 40 °C.

Question 18.

Calculate the mean free path of a molecule at 250C, if the distance covered in two successive collisions is 1.0A and the pressure inside the container is 3.0 atm.

Question 19.

Estimate the total number of air molecules (inclusive of oxygen, nitrogen, water vapour and other constituents) in a room of capacity 30.0 m3 at a temperature of 25°C and 1 atm pressure.

Question 20.

At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the rms speed of a helium gas atom at – 10 °C? (Atomic mass of Ar = 39.9 u, of He = 4.0 u).

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  1. Application of Knowledge: Problem-solving allows you to apply the theoretical concepts of the topic Class 11 Physics Kinetic Theory you have learned to real-life situations. It helps you bridge the gap between abstract knowledge and practical scenarios, making the learning more relevant and meaningful.
  2. Understanding Deeper Concepts: When you encounter problems related to a theoretical concept that you learned in Class 11 Physics Kinetic Theory NCERT Chapter 12, you are forced to delve deeper into its intricacies. This deeper understanding enhances your comprehension of the subject and strengthens your grasp of the underlying principles.
  3. Critical Thinking: Problem-solving encourages critical thinking and analytical skills. It requires you to analyze the problem, identify relevant information, and devise a logical solution. This process sharpens your mind and improves your ability to approach complex challenges effectively.
  4. Retention and Recall: Actively engaging in problem-solving reinforces your memory and improves long-term retention. Applying the concepts learned in Kinetic Theory Class 11 Physics in practical scenarios helps you remember them better than passive reading or memorization.
  5. Identifying Knowledge Gaps: When you attempt to solve problems, you may encounter areas where your understanding is lacking. These knowledge gaps become evident during problem-solving, and you can then focus on filling those gaps through further study and practice. You can refer Kinetic Theory Class 11 Physics Notes on LearnoHub.com
  6. Boosting Confidence: Successfully solving problems after learning a theoretical concept boosts your confidence in your abilities to handle Kinetic Theory. This confidence motivates you to tackle more challenging tasks and improves your overall performance in the subject.
  7. Preparation for Exams and Challenges: Many exams, especially in science, mathematics, and engineering, involve problem-solving tasks. Regular practice in problem-solving prepares you to face these exams with confidence and perform well. It is also advised to take tests on Kinetic Theory Class 11 Physics Online Tests at LearnoHub.com.
  8. Enhancing Creativity: Problem-solving often requires thinking outside the box and exploring various approaches. This fosters creativity and innovation, enabling you to come up with novel solutions to different problems.
  9. Life Skills Development: Problem-solving is a valuable life skill that extends beyond academics. It equips you with the ability to tackle various challenges you may encounter in personal and professional life.
  10. Improving Decision Making: Problem-solving involves making decisions based on available information and logical reasoning. Practicing problem-solving enhances your decision-making skills, making you more effective in making informed choices.

In summary, problem-solving after learning a theoretical concept on CBSE Kinetic Theory Class 11 Physics is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.

You must have heard of the phrase “Practice makes a man perfect”. Well, not just a man, practice indeed enhances perfection of every individual.

Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.

All About Daily Practice Problems on Class 11 Physics Kinetic Theory NCERT Chapter 12

Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 11 Physics Kinetic Theory NCERT Chapter 12 useful.

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