Class XI

Internal energy of a system is
  1. a discrete variable
  2. a random variable
  3. a complex variable
  4. a state variable
For solids near room temperature the molar specific heat (R is the universal gas constant)
  1. 5R
  2. R
  3. 3R
  4. 2R
In Thermodynamics Extensive variables depend
  1. on the ‘temperature’ of the system
  2. on the ‘entropy’ of the system
  3. on the ‘pressure’ of the system
  4. on the ‘size’ of the system
Adiabatic wall is –
  1. a thermally insulating wall that does not allow flow of heat from one body to another
  2. a thermally conducting wall that does not allow flow of heat from one body to many
  3. a thermally conducting wall that does not allow flow of heat from one body to another
  4. a thermally insulating wall that does allows flow of heat from one body to another
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
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