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Chemical Engineering :: Stoichiometry

  1. Concentration of a solution expressed in terms of __________ is independent of temperature.

  2. A.

     Molarity

    B.

     Normality

    C.

     Molality

    D.

     None of these


  3. Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the

  4. A.

     Recycling

    B.

     Purging

    C.

     Bypassing

    D.

     Recirculation


  5. Which of the following gases is the most soluble in water?

  6. A.

     NH₃

    B.

     CO₂

    C.

     H₂S

    D.

     CH₄


  7. Pick out the wrong statement:

  8. A.

     Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve

    B.

     At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite

    C.

     Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture

    D.

     Clapeyron equation is given by,dP/dT = λ/T(VG - VL); where, P = vapor pressure, T = absolute temperature, λ = latent heat of vaporisation, VG and VL = vol


  9. Internal energy of a substance comprises of the __________ energy.

  10. A.

     Vibrational

    B.

     Rotational

    C.

     Translational

    D.

     All of the above


  11. At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to

  12. A.

     Decrease in mean free path

    B.

     Increased collision rate among molecules

    C.

     Increase in molecular attraction

    D.

     Increase in average molecular speed


  13. Which of the following is insensitive to changes in pressure?

  14. A.

     Heat of vaporisation

    B.

     Melting point

    C.

     Heat of fusion

    D.

     Both B & C


  15. Number of gram equivalent of solute dissolved in one litre of solution is called its

  16. A.

     Normally

    B.

     Molarity

    C.

     Molality

    D.

     Formality


  17. 1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?

  18. A.

     5

    B.

     10

    C.

     15

    D.

     20


  19. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?

  20. A.

     Temperature

    B.

     Nature of solute

    C.

     Pressure

    D.

     Nature of solvent