For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

A. Increases

B. Decreases

C. Remain constant

D. Increases to a maximum before decreasing

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the…
  2. The value of for air & most common gases can be safely assumed to be
  3. Normalising does not __________ of a metal.
  4. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other…
  5. Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
  6. Hardening of steel is not possible, unless it is heated __________ critical point.
  7. Pick out the wrong statement.
  8. Current employed in resistance welding ranges from __________ kVA/.
  9. Tempering of a material does not improve its
  10. The most economical channel section for the fluid flow is the one for which the discharge is maximum…
  11. The product of a commercial direct reduction process is
  12. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
  13. The refrigerant freon-12 is chemically
  14. at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of…
  15. Which of the following approaches the ideal gas behaviour most closely?
  16. Air-petrol ratio in an automotive petrol engine is around
  17. Superheating of steam is done at constant
  18. For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation…
  19. Induced draft fans provided in large thermal power plant boilers have __________ blades.
  20. Diamagnetic materials
  21. During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional…
  22. Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional…
  23. Ceramic compounds as compared to metallic compounds
  24. Powder metallurgy technique is used in the production of __________ tools.
  25. A psychrometer does not measure the __________ temperature of moist air.
  26. A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through…
  27. Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
  28. The stress at which extension of the material takes place more rapidly as compared to the increase in…
  29. Increase in temperature, in general results in the
  30. __________ property of steel increases by addition of large amount of silicon in it.