Class XI

Thermodynamic state of a system is an equilibrium state
  1. if the macroscopic variables that characterize the system change decrease in time
  2. if the macroscopic variables that characterize the system do not change in time
  3. if the macroscopic variables that characterize the system change randomly
  4. if the macroscopic variables that characterize the system change linearly in time
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
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
If CpCp and CvCv are molar specific heat capacities of an ideal gas at constant pressure and volume respectively and R is the universal gas constant, relation between the three is
  1. CpCp - CvCv = 2R
  2. CpCp + CvCv = R
  3. CpCp - CvCv = R
  4. CpCp + CvCv = 2R
First Law of Thermodynamics is
  1. the general law of conservation of energy applied to any system in which the energy transfer from or to the surroundings is taken into account
  2. the general law of conservation of mass applied to any system in which the energy transfer from or to the surroundings is taken into account
  3. The general law of conservation of angular momentum applied to any system in which the energy transfer from or to the surroundings is taken into account
  4. the general law of conservation of momentum applied to any system in which the energy transfer from or to the surroundings is taken into account
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