Free Thermodynamics MCQs with Answers
714 Thermodynamics MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Thermal equilibrium and heat explain how temperature and energy transfer are related, while molar specific heats describe the heat required by a gas at constant volume or constant pressure. The first law connects heat supplied, work done and change in internal energy, with sign conventions kept distinct from temperature changes.
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Read the Thermodynamics notesFree MDCAT chapter notes with key terms714 questions · page 18 of 36
- A. Thermal conductivities
- B. Coefficients of expansion
- C. Densities
- D. Heat capacities
Explanation: The correct answer is that the samples have different specific heat capacities.
Correct answer: Heat capacities- A. Linear motion and rolling motion
- B. rolling motion and linear motion
- C. Linear motion and rotatory motion
- D. rotatory motion and linear motion
Explanation: The internal energy of a monatomic gas is due to linear motion only and that of the diatomic gas is due to rolling (linear rotatory)…
Correct answer: Linear motion and rolling motion- A. 4RT
- B. 5RT
- C. 15RT
- D. 11RT
Explanation: This is the following solution: (students must learn the formula)
Correct answer: 11RT- A. ∞
- B. Zero
- C. Finite but not zero
- D. 0<C<∞
Explanation: The correct answer is B because in an adiabatic process, there is no heat exchange (Q = 0) between the gas and its surroundings.
Correct answer: Zero- A. Specefic heat
- B. Molar specfic heat capacity at constant pressure
- C. Molar heat capacity at constant pressure
- D. Heat capacity at constant pressure
Explanation: The amount of heat required to raise the temperature of one mole of a substance through one Kelvin at constant pressure is "Molar heat…
Correct answer: Molar heat capacity at constant pressure- A. A
- B. B
- C. C
- D. All have equal specefic heat
Explanation: The substance which gets heated more or under application of heat for a longer period of time, is expected to have a greater specific heat…
Correct answer: C- A. Become minimum
- B. become maximum
- C. become zero
- D. None of these
Explanation: At absolute zero temperature, molecular motion theoretically stops entirely, reducing kinetic energy to zero.
Correct answer: become zero- A. Heat
- B. Temperature
- C. P.E
- D. None of these
Explanation: In the context of molecular motion, temperature is a measure of the average kinetic energy of particles in a substance.
Correct answer: Temperature- A. Adiabatic Process
- B. Isobaric process
- C. Isothermal Process
- D. Isochoric Process
Explanation: In an isobaric process, the pressure remains constant while heat is added or removed from the system.
Correct answer: Isobaric process- A. 60⁰
- B. 280⁰
- C. 360⁰
- D. 160⁰
Explanation: F=2C5/9 C=2C−325/10 C−5/9 C=321/5C=32C=32×5=160
Correct answer: 160⁰- A. convection
- B. conduction
- C. radiaton
- D. all of these
Explanation: Radiation is the fastest mode of heat transfer because it doesn't rely on a medium for propagation.
Correct answer: radiaton- A. Clausius statement
- B. Kelvin statement
- C. Carnot statement
- D. Boyles statement
Explanation: The Carnot statement of the second law of thermodynamics is derived from the analysis of heat engines and is related to the efficiency of…
Correct answer: Carnot statement- A. reflect more sunlight
- B. absorb more sunlight
- C. are more pleasing to the eye
- D. transmit more light
Explanation: Light-coloured shades have higher reflectivity, meaning they reflect a larger portion of incoming sunlight away from the building.
Correct answer: reflect more sunlight- A. cyclic process
- B. operated at certain temperature difference
- C. petrol must be used
- D. both (a) and (b)
Explanation: A heat engine works by utilizing a cyclic process, where it continuously operates in a repeating sequence.Additionally, a heat engine…
Correct answer: both (a) and (b)- A. Specific heat of the slab
- B. cross-sectional area of the slab
- C. thermal conductivity of the slab
- D. temperature difference between opposite faces of the slab
Explanation: The first law of thermodynamics is a consequence of the conservation of energy, which states that energy cannot be created or destroyed…
Correct answer: Specific heat of the slab- A. isobaric
- B. isochoric
- C. adiabatic
- D. isothermal
Explanation: an isothermal process, the temperature remains constant throughout the process.
Correct answer: isothermal- A. isothermal
- B. isobaric
- C. isochoric
- D. adiabatic
Explanation: The process in thermodynamics during which the volume of a system remains constant is referred to as an isochoric process.
Correct answer: isochoric- A. Celsius scale
- B. Fahrenheit scale
- C. Centigrade scale
- D. Thermodynamic scale
Explanation: The thermodynamic temperature scale, also known as the Kelvin scale, is independent of the nature of the working substance.
Correct answer: Thermodynamic scale- A. Electric generator
- B. Refrigerator
- C. Carnot engine
- D. Electric motor
Explanation: A heat engine converts heat energy into mechanical work, and it operates in a cycle.
Correct answer: Refrigerator- A. Isotherm
- B. Adiabatic
- C. Both a and b
- D. Either a or b
Explanation: An isotherm is a curve on a graph representing the variation of pressure or other parameters while keeping the temperature constant during…
Correct answer: Isotherm