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Chemical Engineering :: Stoichiometry

  1. The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the

  2. A.

     Trouton's rule

    B.

     Kopp's rule

    C.

     Antonie equation

    D.

     Kistyakowsky equation

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  3. Equal masses of CH₄ and H₂ are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is

  4. A.

     1/9

    B.

     8/9

    C.

     1/2

    D.

     5/9

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  5. The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour

  6. A.

     Measures the elevation in boiling point

    B.

     Is not dependent on the temperature

    C.

     Is a function of the liquid phase composition

    D.

     Measures the depression in freezing point

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  7. An ideal gas can be liquified, because

  8. A.

     Its molecular size is very small

    B.

     Its critical temperature is more than 0°C

    C.

     Forces operative between its molecules are negligible

    D.

     It gets solidified directly without becoming liquid

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  9. The value of the gas-law constant 'R' is 1.987

  10. A.

     Kcal/kg-mole.°C

    B.

     Btu/lb-mole.°R

    C.

     Kcal/kg-mole.°K

    D.

     Both B & C

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  11. Volume occupied by one gm mole of a gas at S.T.P. is

  12. A.

     22.4 litres

    B.

     22400 litres

    C.

     22.4 c.c

    D.

     359 litres

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  13. The number of H⁺ in 1 c.c solution of pH 13 is

  14. A.

     6.023 xl0¹³

    B.

     6.023 x 10¹⁰

    C.

     6.023xl0⁷

    D.

     10¹³

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  15. The density of a liquid is 1500 kg/m³. Its value in gin/litre will be equal to

  16. A.

     1.5

    B.

     15

    C.

     150

    D.

     1500

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  17. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about

  18. A.

     0.19

    B.

     0.33

    C.

     0.40

    D.

     0.67

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  19. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies

  20. A.

     0 < Xw < 0.5

    B.

     Xw = 0.5

    C.

     0.5 < Xw < 1.0

    D.

     Xw = 1.0

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