Thermal Equilibrium and the Concept of Temperature NEET Questions

Physics - Thermodynamics

Thermal Equilibrium and the Concept of Temperature MCQ Questions


1.
Thermodynamics is the branch of physics that deals with:
A.
Properties of fluids at rest
B.
Structure of atoms and molecules
C.
Concepts of heat and temperature and their inter-conversion with other forms of energy
D.
Motion of particles under forces and torques
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ANSWER :
C. Concepts of heat and temperature and their inter-conversion with other forms of energy
2.
Thermodynamics is described as a macroscopic science because:
A.
It requires knowledge of molecular velocities
B.
It deals only with very small systems
C.
It applies only to gases
D.
It deals with bulk systems using macroscopic variables like pressure, volume, and temperature — without going into molecular details
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ANSWER :
D. It deals with bulk systems using macroscopic variables like pressure, volume, and temperature — without going into molecular details
3.
Which of the following best describes the thermodynamic state of a gas?
A.
Positions and velocities of all individual molecules
B.
Number of electrons in each atom
C.
Distribution of molecular velocities only
D.
Macroscopic variables: pressure, volume, temperature, mass, and composition
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ANSWER :
D. Macroscopic variables: pressure, volume, temperature, mass, and composition
4.
The key distinction between mechanics and thermodynamics is:
A.
Mechanics studies motion of particles under forces/torques; thermodynamics deals with internal macroscopic state and energy transfer as heat and work
B.
Mechanics applies only to solids
C.
Mechanics uses SI units; thermodynamics does not
D.
Thermodynamics is more accurate than mechanics
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ANSWER :
A. Mechanics studies motion of particles under forces/torques; thermodynamics deals with internal macroscopic state and energy transfer as heat and work
5.
Count Rumford's experiment (1798) on boring a brass cannon demonstrated that:
A.
Heat is a form of energy — the amount of heat produced depended on work done, not on the sharpness of the drill
B.
Heat production depends on the sharpness of the drill
C.
Heat is a fluid (caloric) stored in the pores of matter
D.
Heat flows from cold to hot bodies
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ANSWER :
A. Heat is a form of energy — the amount of heat produced depended on work done, not on the sharpness of the drill
6.
The old (incorrect) theory of heat regarded it as:
A.
A property of massless particles
B.
A form of kinetic energy only
C.
A fine invisible fluid called caloric filling the pores of substances
D.
A form of potential energy
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ANSWER :
C. A fine invisible fluid called caloric filling the pores of substances