What Are the Types of Thermodynamic Processes and Their Examples?
This page provides thorough NEET Thermodynamics MCQ practice with 20 targeted questions, covering NEET-relevant concepts and calculation types. Mastering thermodynamics mcq is key for scoring high in NEET Chemistry. Use this practice set for chapterwise revision, spotting weak areas, and boosting accuracy—essential for aspirants targeting top NEET ranks.
What are MCQs for Thermodynamics?
Thermodynamics MCQ for NEET are multiple-choice questions aligning with NEET Chemistry’s thermodynamics chapter. They test understanding of laws, processes, calculations, and applications, helping students revise concepts, practice speedy problem-solving, and prepare confidently for NEET 2025.
Why Practice NEET Thermodynamics MCQs?
Regular NEET thermodynamics MCQ practice sharpens conceptual clarity, improves time management, and reduces negative marking. Focused MCQs mirror real NEET exam patterns, helping identify errors in heat, work, entropy, and fundamental laws—boosting exam confidence and performance.
Practice MCQs: Thermodynamics NEET Chapterwise Questions
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If a system absorbs 50 J of heat and does 20 J of work, what is the change in internal energy (ΔU)?
A. 30 J
B. 70 J
C. 20 J
D. 50 J
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Which law of thermodynamics establishes the concept of temperature?
A. Zeroth
B. First
C. Second
D. Third
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The equation ΔQ = ΔU + PΔV is a statement of:
A. Newton's Law
B. First Law of Thermodynamics
C. Second Law of Thermodynamics
D. Joule’s Law
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In which thermodynamic process does the temperature stay constant?
A. Isothermal
B. Adiabatic
C. Isochoric
D. Isobaric
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Which variable is held constant in Charles's Law?
A. Temperature
B. Volume
C. Pressure
D. Density
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For an adiabatic process, what is the value of heat exchanged (ΔQ)?
A. Maximum
B. Minimum
C. Zero
D. Equal to internal energy change
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If 110 J heat is supplied to a gas and its internal energy increases by 40 J, how much work is done by the system?
A. 70 J
B. 150 J
C. 40 J
D. 110 J
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The efficiency (η) of a Carnot engine working between TH (hot) and TC (cold) is:
A. η = TH / TC
B. η = 1 - (TC / TH)
C. η = TC / TH
D. η = TH / (TC + TH)
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Which is NOT a state function?
A. Internal energy
B. Enthalpy
C. Work
D. Pressure
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Which law of thermodynamics states that energy can neither be created nor destroyed?
A. Zeroth
B. First
C. Second
D. Third
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An ideal gas expands isothermally. The internal energy change is:
A. Positive
B. Negative
C. Zero
D. Infinite
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In a cyclic process, the change in internal energy is:
A. Maximum
B. Depends on path
C. Zero
D. Equal to work done
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If a Carnot engine has its source at 600 K and sink at 300 K, what is its efficiency?
A. 25%
B. 33%
C. 50%
D. 75%
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What is the entropy change (ΔS) for a reversible isothermal process?
A. ΔS = ΔQ / T
B. ΔS = nCpΔT
C. ΔS = PΔV
D. Zero
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If a process occurs at constant volume, which term becomes zero?
A. Work done (W)
B. Internal energy (U)
C. Change in temperature (ΔT)
D. Heat supplied (Q)
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Which statement is correct for an isobaric process?
A. Pressure is constant
B. Volume is constant
C. Temperature is constant
D. Heat exchange is zero
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The second law of thermodynamics introduces which concept?
A. Pressure
B. Internal energy
C. Entropy
D. Enthalpy
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The work done by an ideal gas in an isothermal irreversible expansion is:
A. nRT ln(Vf/Vi)
B. Zero
C. nCpΔT
D. PΔV/2
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For an adiabatic expansion of an ideal gas, which of the following decreases?
A. Internal energy
B. Temperature
C. Both A and B
D. Enthalpy only
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The Clausius statement is associated with:
A. First law
B. Second law
C. Zeroth law
D. Third law
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A Carnot engine does 1000 J of work at 50% efficiency. How much heat is absorbed from the source?
A. 500 J
B. 2000 J
C. 1500 J
D. 1000 J
MCQ Answer Key
| Q.No. | Answer | Explanation |
|---|---|---|
| 1 | A | ΔU = Q – W = 50 – 20 = 30 J. |
| 2 | A | Zeroth law defines temperature; vital for thermodynamics. |
| 3 | B | First law relates ΔQ, ΔU, and PΔV (Work). |
| 4 | A | Isothermal process keeps temperature constant. |
| 5 | C | Charles’s Law: Pressure is constant. |
| 6 | C | Adiabatic process: no heat exchange (ΔQ = 0). |
| 7 | A | Work done = Q – ΔU; 110 – 40 = 70 J. |
| 8 | B | η = 1 – (TC / TH), for Carnot engine. |
| 9 | C | Work is a path function, not a state function. |
| 10 | B | First law: Conservation of energy (cannot be created/destroyed). |
| 11 | C | Isothermal: ΔU = 0 as temperature is constant. |
| 12 | C | Cyclic process: Internal energy returns to its initial value (ΔU = 0). |
| 13 | C | η = 1 – (300/600) = 0.5 or 50%. |
| 14 | A | Reversible isothermal: ΔS = ΔQ/T. |
| 15 | A | Isochoric (constant volume): No work, W = 0. |
| 16 | A | Isobaric process: pressure remains constant. |
| 17 | C | Second law introduces entropy. |
| 18 | A | Isothermal work = nRT ln(Vf/Vi). |
| 19 | C | Adiabatic expansion: Both internal energy and temperature decrease. |
| 20 | B | Work = 50% of absorbed heat; source heat = 1000/0.5 = 2000 J. |
Explanations clarify reasoning behind each answer and help students understand important NEET concepts.
How These MCQs Help in NEET
Practicing thermodynamics mcq for NEET ensures accuracy with chapterwise NEET chemistry practice. These MCQs mirror NEET exam standards and highlight typical error areas. For deeper practice, visit Vedantu’s Thermodynamics resources or top NEET Thermodynamics questions.
Tips and Next Steps for Thermodynamics NEET Practice
- Revise all formulas and units (energy in joules, temperature in kelvin).
- Understand each law’s practical application for NEET MCQs.
- Time yourself for every practice set.
- Practice more NEET thermodynamics mcq at Vedantu Revision Notes and chapter overview.
- Explore related NEET chemistry MCQs: full MCQ set.
Thermodynamics MCQ practice for NEET builds speed, accuracy, and confidence for the chemistry section. Regular chapterwise practice via Vedantu ensures you master high-yield topics, reduce exam errors, and maximize your NEET 2025 score potential.
FAQs on Thermodynamics Mcq Questions and Answers for Easy Revision
1. What is the NEET Thermodynamics MCQ chapterwise practice test?
NEET Thermodynamics MCQ chapterwise practice test is an online examination tool designed for NEET aspirants to assess their mastery of important concepts in Thermodynamics. This test includes real-exam-standard MCQs, instant answer keys, detailed explanations, and analytics to help students:
- Test their knowledge of key thermodynamics laws, formulas, and applications
- Practice both numerical and theoretical MCQs relevant to the latest NEET trends
- Understand time management and spot improvement areas instantly
- Boost accuracy by reviewing detailed solutions after every attempt
2. How many Thermodynamics MCQs are asked in NEET?
Typically, NEET Chemistry features around 3–5 MCQs from the Thermodynamics chapter each year. The exact number can vary, with questions covering:
- Laws of thermodynamics (first, second, third, zeroth)
- Heat, work, and energy concepts
- Numerical problems on internal energy and entropy
Practicing a full set of chapterwise MCQs ensures you are prepared for any NEET exam pattern changes.
3. Where can I find NEET Thermodynamics MCQ PDFs with answers?
You can download NEET Thermodynamics MCQ PDFs with answers from trusted educational platforms offering:
- Chapterwise MCQ sets with instant answer keys
- Printable PDF formats for offline practice
- Detailed explanations for each question to aid revision
Always prefer well-curated resources that match the latest NEET syllabus and difficulty trends.
4. Does this test include answer keys and explanations?
Yes, the chapterwise NEET Thermodynamics MCQ test provides instant answer keys and detailed explanations after you submit your answers. Students benefit from:
- Immediate feedback on each MCQ's correctness
- Step-by-step solutions for calculation-based questions
- Clarification of common conceptual mistakes
5. Is the difficulty level similar to the actual NEET exam?
The difficulty level of these Thermodynamics MCQs is designed to closely mirror the actual NEET exam by mixing easy, moderate, and a few challenging conceptual and numerical questions. This helps students:
- Experience exam-like pressure and time limits
- Assess readiness for all possible types of NEET Chemistry questions
6. What are the best ways to practice NEET Thermodynamics MCQs?
The best way to practice NEET Thermodynamics MCQs is through systematic, timed chapterwise tests that provide answer keys and analytics. Effective strategies include:
- Regularly attempting online or PDF-based MCQ sets
- Reviewing explanations for all incorrect answers
- Simulating timed tests to improve speed and accuracy
- Analyzing mistakes with exam-focused analytics
7. What is the weightage of Thermodynamics in NEET Chemistry?
The Thermodynamics chapter typically carries about 12–20 marks in NEET Chemistry. Its weightage includes:
- Direct MCQs from thermodynamic laws and formulas
- Numerical questions assessing calculation skills
- Indirect application-based questions in related chemistry units
8. How does instant answer feedback help improve my NEET score?
Getting instant answer feedback after each MCQ helps NEET aspirants:
- Quickly identify strengths and weaknesses
- Understand and rectify errors before the real exam
- Boost confidence by tracking progress and improvements
- Develop faster problem-solving with immediate validation
9. Will I get analytics on time spent and accuracy for each NEET Chemistry chapter?
Yes, most advanced chapterwise NEET MCQ platforms offer analytics that show:
- Time spent per question and section
- Accuracy rates for each chapter or concept
- Error analysis to identify weak topics requiring more revision
10. Are detailed solutions given for calculation-based Thermodynamics MCQs?
Yes, all calculation-based Thermodynamics MCQs come with step-by-step detailed solutions explaining the methods, formulas, and logic behind each answer. This helps students:
- Understand where their calculations went wrong
- Master the application of formulas for NEET-style questions
- Clarify conceptual doubts before exam day
11. Can I practice NEET Thermodynamics MCQs online more than once?
Yes, most NEET Thermodynamics online MCQ tests allow students to re-attempt chapterwise practice as often as needed. This repeated practice:
- Reinforces memory of key Thermodynamics concepts
- Improves speed, accuracy, and exam temperament
- Helps track improvement across multiple attempts with analytics
12. What are the top mistakes students make in Thermodynamics MCQs for NEET?
Common mistakes in Thermodynamics NEET MCQs include:
- Forgetting to convert units correctly in calculations
- Confusing the direction of heat and work in various processes
- Misapplying the first and second laws of thermodynamics
- Overlooking key terms like internal energy or entropy in conceptual questions
