Thermal Equilibrium and the Concept of Temperature NEET Questions

Physics - Thermodynamics

Thermal Equilibrium and the Concept of Temperature MCQ Questions


13.
If a system is in thermal equilibrium with another, which of the following must be true?
A.
Their pressures are equal
B.
Their masses are equal
C.
Their volumes are equal
D.
Their temperatures are equal
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ANSWER :
D. Their temperatures are equal
14.
Which of the following conditions is necessary for thermal equilibrium?
A.
Equal masses
B.
Constant volume
C.
Same densities
D.
No heat transfer
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ANSWER :
D. No heat transfer
15.
Which of the following statements is true about thermal equilibrium?

NEET - 2020

A.
It occurs when two systems in thermal contact exchange equal amounts of heat.
B.
It is achieved when two systems reach the same temperature and no heat flows between them.
C.
It requires both systems to have the same heat capacity.
D.
It depends on the masses of the systems involved.
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ANSWER :
B. It is achieved when two systems reach the same temperature and no heat flows between them.
16.
What is the physical significance of the zeroth law of thermodynamics?
A.
Defines entropy
B.
Defines mechanical equilibrium
C.
Defines thermal equilibrium
D.
Defines heat capacity
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ANSWER :
C. Defines thermal equilibrium
17.
When two objects are in thermal equilibrium, their:
A.
Masses are equal
B.
Pressures are equal
C.
Densities are equal
D.
Volumes are equal
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ANSWER :
C. Densities are equal
18.
If a hot object is placed in contact with a cold object, heat transfer occurs until:
A.
The objects are the same size
B.
They reach the same temperature
C.
They reach the same volume
D.
Heat stops flowing
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ANSWER :
B. They reach the same temperature