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Chemical Engineering :: Stoichiometry

  1. 'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the

  2. A.

     Temperature vs. log (vapor pressure)

    B.

     Vapor pressure vs. log (temperature)

    C.

     Log (temperature) vs. log (vapor pressure)

    D.

     Vapor pressure vs. temperature


  3. pH value of a solution containing 1 gm of hydrogen ion per litre will be

  4. A.

     0

    B.

     1

    C.

     7

    D.

     10


  5. Weight of 56 litres of ammonia at N.T.P. is __________ gm.

  6. A.

     2.5

    B.

     42.5

    C.

     56

    D.

     2800


  7. During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.

  8. A.

     Enthalpy

    B.

     Gibbs free energy

    C.

     Internal energy

    D.

     Entropy


  9. Pick out the correct statement.

  10. A.

     Heat of solution is always positive

    B.

     At equilibrium, ΔG is zero

    C.

     For the reaction, PCl5 ⇋ PCl3 + Cl₂, ΔG is less than ΔE

    D.

     The heating of water in a beaker is an example of an isolated system


  11. Pick out the correct statement.

  12. A.

     A substance existing above its critical temperature is called a saturated vapor

    B.

     A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is more than the partial pressure of the vapor at the same temperature

    C.

     Heat added to or given up by a substance at constant temperature is called the sensible heat

    D.

     The end points of a vapor-pressure vs. temperature curve are critical and triple points


  13. Claussius Clapeyron equation applies to the __________ process.

  14. A.

     Sublimation

    B.

     Melting

    C.

     Vaporisation

    D.

     All of the above


  15. With increase in the solute concentration, the specific heat of aqueous solutions

  16. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Either A or B; depends on the type of solution


  17. For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is

  18. A.

     0

    B.

     1

    C.

     2

    D.

     3


  19. In a neutral solution

  20. A.

     H⁺ ions are absent

    B.

     OH⁻ ions are absent

    C.

     Both H⁺ and OH⁻ ions are present in very small but equal concentration

    D.

     None of these