Dry ice is

A. Moisture free ice

B. Solid helium

C. Solid carbon dioxide

D. None of these

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  1. Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system…
  2. The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume…
  3. Helmholtz free energy (A) is defined as
  4. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity…
  5. For a reversible process involving only pressure-volume work
  6. A gas performs the maximum work, when it expands
  7. Which of the following identities can be most easily used to verify steam table data for superheated…
  8. Boiling of liquid is accompanied with increase in the
  9. For an ideal gas, the enthalpy
  10. Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called…
  11. Cv is given by
  12. Rotary lime kiln is an example of a/an __________ system.
  13. Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the
  14. The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300…
  15. Pick out the wrong statement.
  16. Number of phases in a colloidal system is:
  17. Pick out the correct statement.
  18. Which of the following processes cannot be made reversible even under ideal condition of operation?
  19. The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.
  20. Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.
  21. Which of the following has the least thermal efficiency?
  22. If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are…
  23. Critical temperature is defined as the temperature above which a gas will
  24. When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the…
  25. Free energy changes for two reaction mechanism 'X' and 'Y are respectively - 15 and - 5 units. It implies…
  26. Gibbs free energy at constant pressure and temperature under equilibrium conditions is
  27. The specific heat of saturated water vapour at 100°C is
  28. The free energy change for a chemical reaction is given by (where, K = equilibrium constant)
  29. A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system
  30. Dry ice is