Thermal Physics MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The ratio of the heat absorbed by a system to the work done by the system is known as:
A. Thermal efficiency
B. Mechanical efficiency
C. Thermal conductivity
D. Enthalpy
Answer: Thermal efficiency
The amount of heat required to change the temperature of 1 mole of a substance by 1°C is known as:
A. Molar heat capacity
B. Specific heat capacity
C. Latent heat
D. Thermal conductivity
Answer: Molar heat capacity
The principle of ‘conservation of mass and energy’ is a part of which law?
A. First law of thermodynamics
B. Second law of thermodynamics
C. Third law of thermodynamics
D. Zeroth law of thermodynamics
Answer: First law of thermodynamics
Which thermodynamic process occurs at constant entropy?
A. Isentropic process
B. Isothermal process
C. Isochoric process
D. Isobaric process
Answer: Isentropic process
The process by which a gas turns directly into a solid is called:
A. Deposition
B. Sublimation
C. Condensation
D. Evaporation
Answer: Deposition
Which gas law states that volume is directly proportional to temperature at constant pressure?
A. Charles' law
B. Boyle's law
C. Avogadro's law
D. Ideal gas law
Answer: Charles' law
The temperature at which a substance changes from liquid to gas is known as:
A. Boiling point
B. Freezing point
C. Melting point
D. Sublimation point
Answer: Boiling point
The energy required to raise the temperature of 1 gram of water by 1°C is known as:
A. Calorie
B. Joule
C. Watt
D. Newton
Answer: Calorie
Which of the following statements is true about an adiabatic process?
A. No heat is exchanged with the surroundings
B. Temperature remains constant
C. Pressure remains constant
D. Volume remains constant
Answer: No heat is exchanged with the surroundings