Proven Strategies to Ace JEE Main Thermodynamics Mock Tests
Thermodynamics plays a pivotal role in JEE Physics, focusing on energy conservation, entropy, and the fundamental principles governing heat and work. This mock test challenges your grasp of the key laws, thermodynamic processes, and problem-solving techniques essential for high scores. Strengthen your understanding by tackling these expertly designed questions.
Mock Test Instructions for the Thermodynamics Mock Test 1-2:
- 20 questions from Thermodynamics Mock Test 1-2
- Time limit: 20 minutes
- Single correct answer per question
- Correct answers appear in bold green after submission
How Can JEE Mock Tests Help You Master Thermodynamics?
- Use mock tests to identify common misconceptions in heat and energy concepts.
- Track your progress by repeating mock tests and refining your understanding.
- Focus on complex thermodynamic cycles and their applications in problem-solving.
- Mock tests help in improving your speed while solving numerical questions in thermodynamics.
- Mock test feedback highlights the areas where you need further review in energy conservation.
Master the Laws of Thermodynamics with Expert-Designed JEE Mock Tests
- Understand the First and Second Laws of Thermodynamics through targeted mock test questions.
- Refine your understanding of thermodynamic systems with time-based mock tests.
- Practice applying thermodynamic principles to JEE-style questions under exam conditions.
- Mock tests expose tricky concepts and provide opportunities for hands-on practice.
- Enhance retention of key formulas by solving mock test questions focused on thermodynamics.
Subject-Wise Excellence: JEE Main Mock Test Links
| S.No. | Subject-Specific JEE Main Online Mock Tests |
|---|---|
| 1 | Online FREE Mock Test for JEE Main Chemistry |
| 2 | Online FREE Mock Test for JEE Main Maths |
| 3 | Online FREE Mock Test for JEE Main Physics |
Important Study Materials Links for JEE Exams
FAQs on JEE Main 2025-26 Thermodynamics Mock Test: Ultimate Preparation Guide
1. What is the first law of thermodynamics?
The first law of thermodynamics, also known as the law of conservation of energy, states that energy can neither be created nor destroyed; it can only be transformed from one form to another. Mathematically, it is expressed as ΔU = Q - W, where ΔU is the change in internal energy, Q is the heat supplied to the system, and W is the work done by the system.
2. Differentiate between isothermal and adiabatic processes.
Isothermal process occurs at constant temperature, so the change in internal energy (ΔU) is zero. Heat exchange with surroundings is allowed. Adiabatic process occurs without any heat exchange (Q = 0), so all energy change appears as work, and temperature changes as a result. These are important thermodynamic processes in JEE and NEET exams.
3. What is an extensive property in thermodynamics?
Extensive properties depend on the amount of substance present in the system, such as mass, volume, and internal energy. In contrast, intensive properties do not depend on the size of the system (examples: temperature, pressure).
4. Explain the concept of entropy in thermodynamics.
Entropy is a measure of the degree of disorder or randomness in a system. In any spontaneous process, the total entropy of a system and its surroundings increases. Entropy is a central concept in the second law of thermodynamics and is frequently asked in NEET, JEE, and other entrance exams.
5. What do you mean by reversible and irreversible processes?
Reversible processes are ideal processes that can be reversed at any stage by infinitesimal changes, leaving no change in both system and surroundings. Irreversible processes are real processes that cannot return both system and surroundings to their original states due to factors like friction, unrestrained expansion, or heat loss.
6. What is the significance of the zeroth law of thermodynamics?
The zeroth law of thermodynamics defines thermal equilibrium. It states: If two systems are in thermal equilibrium with a third system, then they are in equilibrium with each other. This law forms the basis of the concept of temperature.
7. Define a thermodynamic system and its types.
A thermodynamic system is the part of the universe we are studying, separated by boundaries. Types are:
• Open system: Exchanges both matter and energy.
• Closed system: Exchanges energy, not matter.
• Isolated system: Exchanges neither energy nor matter.
8. How is the work done in an isothermal expansion of an ideal gas calculated?
Work done (W) by an ideal gas during isothermal expansion at temperature T is W = nRT ln(Vf/Vi) where:
n = number of moles,
R = gas constant,
Vf = final volume,
Vi = initial volume.
9. State and explain the second law of thermodynamics.
The second law of thermodynamics states that in all natural processes, the total entropy of the universe increases over time and does not decrease. This law explains why heat flows from hot to cold and not vice versa, and it sets the direction for spontaneous processes.
10. What is the difference between heat and work in thermodynamics?
Heat is the energy transferred due to temperature difference, while work is energy transfer due to mechanical action. Both are path functions and are not properties of the system, but modes of energy transfer.
11. What is meant by the internal energy of a system?
Internal energy is the total energy possessed by the system due to both its kinetic and potential energies of molecules. It is a state function and a thermodynamic property important for calculations in physics and chemistry.
12. Which thermodynamic process is used in the Carnot engine, and why is it important?
The Carnot engine uses two isothermal and two adiabatic processes in a cyclic manner. It is important because it represents the maximum possible efficiency that any heat engine can achieve, as dictated by the laws of thermodynamics.
