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Chemical Engineering :: Stoichiometry

  1. If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.

  2. A.

     10

    B.

     20

    C.

     70

    D.

     100


  3. The atomic heat capacities of all solid elements __________ with decrease in temperature.

  4. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Approach zero at 0°C


  5. At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.

  6. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Increases linearly


  7. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.

  8. A.

     Varies linearly

    B.

     Increases

    C.

     Decreases

    D.

     Does not vary


  9. Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.

  10. A.

     1

    B.

     2

    C.

     3

    D.

     4


  11. 1 Pascal (unit of pressure) is equal to __________ N/m².

  12. A.

     10

    B.

     1

    C.

     0.1

    D.

     1000


  13. The unit of specific heat at constant pressure, Cp, in SI unit is

  14. A.

     W/m²°C

    B.

     J/kg°K

    C.

     W/m°K

    D.

     J/m³°K


  15. Cp - Cv, for an ideal gas is equal to

  16. A.

     R

    B.

     R/2

    C.

     2R

    D.

     3R


  17. With increase in temperature, the surface tension of water

  18. A.

     Increases

    B.

     Decreases

    C.

     Remains constant

    D.

     Increases linearly


  19. The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is

  20. A.

     Doubled

    B.

     Halved

    C.

     Trebled

    D.

     Unpredictable