Thermal Physics MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The process by which a gas turns into a liquid is known as:
A. Condensation
B. Vaporization
C. Sublimation
D. Deposition
Answer: Condensation
Which of the following describes the concept of a ‘heat engine’?
A. Converts heat energy into mechanical work
B. Converts mechanical work into heat energy
C. Transfers heat between two bodies
D. Absorbs heat from a single reservoir
Answer: Converts heat energy into mechanical work
What is the process called when a liquid turns into a solid?
A. Freezing
B. Melting
C. Vaporization
D. Sublimation
Answer: Freezing
The change in internal energy of a system is equal to:
A. Heat added to the system minus work done by the system
B. Work done on the system minus heat added to the system
C. Heat added to the system plus work done by the system
D. Work done by the system plus heat added to the system
Answer: Heat added to the system minus work done by the system
Which of the following is NOT a thermodynamic property?
A. Temperature
B. Pressure
C. Volume
D. Force
Answer: Force
Which process occurs without a change in pressure?
A. Isobaric process
B. Isothermal process
C. Isochoric process
D. Adiabatic process
Answer: Isobaric process
The heat capacity of a system is defined as:
A. The amount of heat required to change the temperature of the system by 1°C
B. The amount of heat required to convert the system into a different phase
C. The amount of heat required to maintain constant temperature
D. The rate at which heat is transferred through the system
Answer: The amount of heat required to change the temperature of the system by 1°C
The process of heat transfer through direct molecular contact is called:
A. Conduction
B. Convection
C. Radiation
D. Evaporation
Answer: Conduction
What happens to the entropy of a system as it approaches absolute zero?
A. It approaches zero
B. It increases
C. It remains constant
D. It becomes infinite
Answer: It approaches zero