Class 11 Chemistry — Chapter 5: Thermodynamics
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 11 Chemistry Chapter 5, "Thermodynamics", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Thermodynamics" is one of the chapters where reactions, named concepts, and balanced numerical work really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Thermodynamics, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Chemistry mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Thermodynamics (Class 11 Chemistry)
This chapter covers the first law of thermodynamics, enthalpy, Hess's law, entropy, and Gibbs energy as the criterion of spontaneity.
- System & first law
- ΔU = q + w; internal energy change equals heat added plus work done on the system.
- Enthalpy
- H = U + PV; at constant pressure, the heat exchanged equals ΔH (the enthalpy change).
- Hess's law
- The total enthalpy change of a reaction is the same whatever the route — enthalpy is a state function.
- Entropy
- S measures disorder/randomness; spontaneous processes tend to increase the total entropy.
- Gibbs energy
- ΔG = ΔH − TΔS; a process is spontaneous when ΔG < 0.
Key formulas — Thermodynamics
💡 Exam tips for Thermodynamics
- Use the sign of ΔG (not ΔH alone) to decide spontaneity — entropy and temperature both matter.
- Hess's law lets you add enthalpies of steps to get an overall ΔH (state function).
Sample questions
Enthalpy H =
H = internal energy + PV.
Entropy is a measure of:
S increases with disorder.
Hess's law: ΔH of overall reaction depends only on:
State function; path-independent.
Thermodynamics — FAQs
What are the key concepts in Class 11 Chemistry Thermodynamics?+
This chapter covers the first law of thermodynamics, enthalpy, Hess's law, entropy, and Gibbs energy as the criterion of spontaneity. Key ideas include System & first law, Enthalpy, Hess's law, Entropy, Gibbs energy.
What does Class 11 Chemistry Chapter 5 (Thermodynamics) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Thermodynamics" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Thermodynamics" questions free to practise?+
Yes — sign in with Google to practise "Thermodynamics" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Thermodynamics" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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