physics : class11 State Function : Internal Energy : Thermodynamics MCQ Questions and Answers
Practice important
State Function
MCQ questions and answers.
Page 1
of
1
|
10
MCQ Questions
1. Which of the following is a state function?
A.
Internal energy
B.
Heat supplied
C.
Work done
D.
Distance travelled
Correct Answer:
Internal energy
Explanation:
Internal energy is a state function because its value depends only on the state of the system, not on the path used to reach that state.
2. The change in internal energy of a system depends on its:
A.
Path followed
B.
Initial and final states
C.
Time taken only
D.
Shape of the container only
Correct Answer:
Initial and final states
Explanation:
Internal energy is a state function, so its change is determined only by the initial and final states of the system.
3. If a system returns to its original state, the change in its internal energy is:
A.
Positive
B.
Negative
C.
Zero
D.
Always maximum
Correct Answer:
Zero
Explanation:
Since internal energy is a state function, its value is the same when the system returns to its original state. Therefore, its net change is zero.
4. Which statement correctly describes a state function?
A.
It depends on the path taken
B.
It depends only on the state of the system
C.
It is always equal to zero
D.
It depends only on the time of the process
Correct Answer:
It depends only on the state of the system
Explanation:
A state function has a definite value for each state of a system and does not depend on how the system reached that state.
5. Two different processes take a system from the same initial state to the same final state. The change in internal energy is:
A.
Different for both processes
B.
The same for both processes
C.
Zero in both processes
D.
Dependent only on the faster process
Correct Answer:
The same for both processes
Explanation:
Because internal energy is a state function, its change depends only on the initial and final states, regardless of the process path.
6. The internal energy of a system is determined by its:
A.
Present state
B.
Past history only
C.
Path followed during the process
D.
Amount of time taken
Correct Answer:
Present state
Explanation:
Internal energy is a state function, so its value is fixed by the current state of the system and not by its past path.
7. Which quantity has a value that is independent of the process path?
A.
Internal energy
B.
Heat transferred
C.
Work done
D.
Length of the path
Correct Answer:
Internal energy
Explanation:
Internal energy is a state function, so its value and change are independent of the path followed between two states.
8. For a cyclic process, the net change in a state function is:
A.
Positive
B.
Negative
C.
Zero
D.
Always one unit
Correct Answer:
Zero
Explanation:
In a cyclic process, the system returns to its initial state. Therefore, any state function, including internal energy, has zero net change.
9. If the initial and final states of a system are fixed, the change in internal energy is:
A.
Independent of the path
B.
Dependent on the path
C.
Dependent only on the color of the system
D.
Always equal to the initial internal energy
Correct Answer:
Independent of the path
Explanation:
The change in internal energy depends only on the initial and final states because internal energy is a state function.
10. Which pair contains only state functions?
A.
Internal energy and temperature
B.
Heat and work
C.
Work and distance travelled
D.
Heat and path length
Correct Answer:
Internal energy and temperature
Explanation:
Internal energy and temperature are properties determined by the state of the system. Heat, work, and path length depend on the process followed.
Short Questions and Answers
Practice short questions and answers related to
State Function
.
Short questions are currently unavailable for this page.