Thermodynamics Practice Questions
Class 11 · Physics · 1659 free MCQs with instant results and detailed explanations.
1659
Total
606
Easy
808
Medium
245
Hard
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Topics in Thermodynamics
Zeroth Law
427
Heat Engines
281
Thermodynamic Processes
384
First Law
224
Second Law
343
Sample Questions from Thermodynamics
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What does the Zeroth Law of Thermodynamics state?
A.
If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other.
B.
Energy cannot be created or destroyed.
C.
The total entropy of an isolated system always increases.
D.
Heat cannot spontaneously flow from a colder body to a hotter body.
Show Answer & Explanation
Correct Answer: A
The Zeroth Law establishes the concept of temperature by stating that if two systems are each in thermal equilibrium with a third system, they must be in equilibrium with each other.
Q2
Easy
Which of the following is a direct consequence of the Zeroth Law?
A.
Introduction of temperature scales.
B.
Conservation of energy.
C.
The concept of work done.
D.
The first law of thermodynamics.
Show Answer & Explanation
Correct Answer: A
The Zeroth Law allows the definition of temperature scales, as it indicates that thermal equilibrium can be used to compare temperatures.
Q3
Easy
If System A is in thermal equilibrium with System B, and System B is in thermal equilibrium with System C, which of the following is true?
A.
System A is in equilibrium with System C.
B.
System A is not in equilibrium with System C.
C.
Only System B is at the same temperature as System C.
D.
System A has a higher temperature than System C.
Show Answer & Explanation
Correct Answer: A
According to the Zeroth Law, if A is in equilibrium with B, and B with C, then A must also be in equilibrium with C.
Q4
Medium
What does the Zeroth Law of Thermodynamics primarily state?
A.
If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other.
B.
Energy cannot be created or destroyed, only transformed.
C.
Heat flows from a hotter body to a colder body.
D.
The internal energy of an ideal gas depends only on temperature.
Show Answer & Explanation
Correct Answer: A
The Zeroth Law establishes a fundamental principle of thermal equilibrium, stating that if two systems are separately in thermal equilibrium with a third, they are in equilibrium with each other.
Q5
Medium
Which of the following statements is NOT a consequence of the Zeroth Law of Thermodynamics?
A.
Temperature can be measured.
B.
Thermal equilibrium can be established.
C.
Heat transfer occurs without temperature difference.
D.
Thermometers can provide consistent readings.
Show Answer & Explanation
Correct Answer: C
The Zeroth Law implies that heat transfer occurs only when there is a temperature difference between systems, thus option C is incorrect.
Q6
Medium
If System A is in equilibrium with System B, and System B is in equilibrium with System C, what can be inferred about Systems A and C?
A.
They are at different temperatures.
B.
They are in thermal equilibrium.
C.
They cannot exchange heat.
D.
They have the same volume.
Show Answer & Explanation
Correct Answer: B
According to the Zeroth Law, if A is in equilibrium with B and B is in equilibrium with C, A and C must also be in thermal equilibrium.
Q7
Medium
Which of the following is the primary measurement used for establishing thermal equilibrium in systems?
A.
Pressure
B.
Volume
C.
Temperature
D.
Density
Show Answer & Explanation
Correct Answer: C
Temperature is the key measurement for establishing thermal equilibrium, as it indicates whether two systems can be in equilibrium.
Q8
Hard
If two systems A and B are in thermal equilibrium with a third system C, which of the following statements is true according to the Zeroth Law of Thermodynamics?
A.
A and B are in thermal equilibrium with each other.
B.
A and C are not in thermal equilibrium.
C.
B and C are not in thermal equilibrium.
D.
A is not in thermal equilibrium with B.
Show Answer & Explanation
Correct Answer: A
The Zeroth Law states that if A is in equilibrium with C and B is in equilibrium with C, then A and B are in equilibrium with each other.
Q9
Hard
Two bodies, X and Y, are in thermal equilibrium with a thermometer. If the temperature of X is 30°C, what can be inferred about the temperature of Y?
A.
Y must be at 30°C.
B.
Y can be at any temperature.
C.
Y must be below 30°C.
D.
Y must be above 30°C.
Show Answer & Explanation
Correct Answer: A
If both bodies are in thermal equilibrium with the same thermometer, they must be at the same temperature.
Q10
Hard
A thermometer measures the temperature of a liquid. If the thermometer is calibrated correctly, what can we say about the temperature of the liquid?
A.
It is higher than the thermometer reading.
B.
It is equal to the thermometer reading.
C.
It is lower than the thermometer reading.
D.
It fluctuates around the thermometer reading.
Show Answer & Explanation
Correct Answer: B
A correctly calibrated thermometer indicates the temperature of the liquid directly, meaning they are equal.
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Thermodynamics — Class 11 Physics Practice Questions Online
This page contains 1659 practice MCQs for the chapter Thermodynamics in Class 11 Physics. The questions are organized by difficulty — 606 easy, 808 medium, 245 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.