LIVE UPDATE  |  Updated for 2026 Boards • JEE • NEET  |  Feb 2026

30 Thermodynamics True/False Questions (NCERT Class 11 Chemistry) – From Basics to JEE Level

30 Questions
3 Difficulty Levels
100% NCERT Aligned
2026 Updated

Thermodynamics Class 11 – True/False Concept Challenge (NCERT Chapter 5)

Test your conceptual clarity with carefully crafted True/False statements from Thermodynamics. Each statement probes essential ideas like system and surroundings, internal energy, heat and work, enthalpy, the first law of thermodynamics, and Hess's law—helping you sharpen accuracy for Boards, JEE, and NEET.

🔥 Topic 01 System & Surroundings
⚡ Topic 02 Internal Energy & ΔU
🌡️ Topic 03 Heat, Work & Enthalpy
📐 Topic 04 First Law & Hess's Law
🔄 Topic 05 State vs Path Functions
📊 Topic 06 Entropy & Spontaneity
✍️
Academia Aeternum Editorial Team Reviewed by Subject Experts • Updated Feb 2026 • NCERT Chapter 5
Verified 2026 Syllabus
📅 Last Updated: February 2026 | Concept Practice – Instant Insight

This practice set presents 30 progressively challenging True/False statements designed to move from NCERT fundamentals to advanced conceptual reasoning. Detailed explanations accompany each answer so you can immediately understand why a statement is correct or misleading.

Why Thermodynamics Concept Questions Matter for JEE & NEET

📈 Exam Trend Analysis • Updated 2026

Thermodynamics questions in competitive exams rarely test formulas alone. Instead, they often probe conceptual understanding of energy changes, sign conventions, reversible vs. irreversible processes, and thermodynamic laws. Practising conceptual True/False statements trains you to recognise subtle wording traps and strengthens your ability to analyse statements quickly during exams.

💡
JEE MAIN 2024–2026 TREND

In recent JEE Main sessions, 2–3 questions per paper directly test thermodynamic sign conventions and the difference between state and path functions. NEET typically includes 4–5 questions from NCERT Thermodynamics, often as direct True/False-style MCQs with subtle word changes.

Essential Equations to Know ΔU = q + w ΔH = ΔU + ΔnᵍRT w = −PₑₓₜΔV ΔG = ΔH − TΔS ΔS = qᵣₑᵥ / T

How Thermodynamics Questions Appear in JEE & NEET 2026

Recent exam papers increasingly include multi-concept questions combining ideas like internal energy change, work done during expansion, and enthalpy relationships. Many problems originate from NCERT statements but are modified with carefully placed conceptual twists.

PATTERN 01 — Direct NCERT Statements lifted verbatim from NCERT with one key word changed (e.g., "always" instead of "sometimes"). These test whether you actually read the text carefully.
PATTERN 02 — Sign Convention Traps Work done by the system vs. work done on the system. Both IUPAC and older conventions appear; knowing which sign convention to apply is critical.
PATTERN 03 — State vs Path Functions Questions that ask if a property depends on the path taken. Common targets: heat (q), work (w), ΔU, ΔH, ΔS, and ΔG.
PATTERN 04 — Multi-Step Reasoning Combining Hess's law, bond enthalpies, and lattice energy in a single statement. These appear in JEE Advanced and require step-by-step logical deduction.

Are You Sure You Understand Thermodynamics?

⚠️ WATCH OUT: HIGH-LOSS MISTAKE ZONES

Many students lose marks not because they lack knowledge, but because they overlook small conceptual details—for example, the sign convention for work, the difference between state and path functions, or the conditions where ΔU = q + w applies. A single word like "always", "only", or "independent" can completely change the correctness of a thermodynamic statement.

That is exactly what this True/False challenge is designed to test.

🎯 Power Words That Change Everything
always never only independent reversible spontaneous constant pressure adiabatic isolated system state function
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PRO STRATEGY FOR TRUE/FALSE

Before marking True or False: (1) Identify the governing law. (2) Check for scope-limiting words like "always" or "only". (3) Recall the exact NCERT statement. (4) Ask yourself: under what conditions does this fail? If you can find even one exception, the statement is False.

Your Progress 0 / 30 attempted
Q 01 / 30
Thermodynamics deals with the study of energy transformations in physical and chemical processes.
Q 02 / 30
A thermodynamic system is the part of the universe chosen for study.
Q 03 / 30
The surroundings include everything outside the thermodynamic system.
Q 04 / 30
An open system can exchange both matter and energy with its surroundings.
Q 05 / 30
A closed system exchanges matter but not energy with the surroundings.
Q 06 / 30
An isolated system exchanges neither energy nor matter with its surroundings.
Q 07 / 30
The state of a thermodynamic system can be described by properties like pressure, volume, and temperature.
Q 08 / 30
Extensive properties depend on the amount of substance present.
Q 09 / 30
Intensive properties depend on the quantity of matter present.
Q 10 / 30
Internal energy is the total energy contained within a system.
Q 11 / 30
Internal energy is a state function.
Q 12 / 30
Heat is a state function.
Q 13 / 30
Work is a path function.
Q 14 / 30
Expansion of a gas against vacuum is called reversible expansion.
Q 15 / 30
In a reversible process, the system remains nearly in equilibrium throughout the change.
Q 16 / 30
The SI unit of work and heat is joule (J).
Q 17 / 30
According to the first law of thermodynamics, \(\Delta U = q + w\).
Q 18 / 30
If work is done by the system, the value of \(w\) is negative.
Q 19 / 30
During expansion of gas, work done is given by \(w = -P_{ext}\Delta V\).
Q 20 / 30
If heat is absorbed by the system, \(q\) is positive.
Q 21 / 30
Enthalpy is defined as \(H = U + PV\).
Q 22 / 30
Enthalpy change at constant pressure equals the heat absorbed or released.
Q 23 / 30
A reaction with negative enthalpy change is called exothermic.
Q 24 / 30
A reaction with positive enthalpy change is called endothermic.
Q 25 / 30
The enthalpy of formation refers to formation of one mole of compound from its elements in their standard states.
Q 26 / 30
Hess's Law states that the enthalpy change of a reaction depends only on the initial and final states.
Q 27 / 30
If a reaction is reversed, the sign of enthalpy change also reverses.
Q 28 / 30
For an ideal gas undergoing free expansion, \(\Delta U = 0\) when temperature remains constant.
Q 29 / 30
For an ideal gas, internal energy depends only on pressure.
Q 30 / 30
In an adiabatic process, no heat is exchanged between system and surroundings.
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