Class XI

In a quasi-static process,
  1. the temperature of the surrounding reservoir and the external pressure differ substantially from the temperature and pressure of the system
  2. the temperature of the surrounding reservoir and the external pressure equal the temperature and pressure of the system
  3. the temperature of the surrounding reservoir differ only infinitesimally from the temperature of the system
  4. the temperature of the surrounding reservoir and the external pressure differ only infinitesimally from the temperature and pressure of the system
Diathermic wall is
  1. a thermally insulating wall that does not allow flow of heat from one body to many
  2. a thermally conducting wall that allows flow of heat from one body to another
  3. a thermally insulating wall that allows flow of heat from one body to another
  4. a thermally conducting wall that does not allow flow of heat from one body to another
Internal energy of a system is
  1. a discrete variable
  2. a random variable
  3. a complex variable
  4. a state variable
Internal energy of a system
  1. is the change in the sum of the kinetic energies and potential energies of the molecules of the system
  2. is the difference of the kinetic energies and potential energies of the molecules of the system
  3. is the change in the difference of the kinetic energies and potential energies of the molecules of the system
  4. is the sum of the kinetic energies and potential energies of the molecules of the system
Zeroth Law of Thermodynamics
  1. states that two systems in thermal equilibrium with a third system simultaneously are never in thermal equilibrium with each other
  2. states that two systems in thermal equilibrium with a third system separately are in thermal equilibrium with each other
  3. states that two systems in thermal equilibrium with a third system separately cannot be in thermal equilibrium with each other
  4. states that a system in thermal equilibrium with a third system separately is in thermal equilibrium with any other
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