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Stoichiometry problems

  • 1. In a chemical process, the recycle stream is purged for

  • Options
  • A. increasing the product yield.
  • B. enriching the product.
  • C. limiting the inerts.
  • D. heat conservation.
    • Discuss
  • 2. If a solution of eutectic composition is cooled, __________ reaching the eutectic temperature.

  • Options
  • A. the solvent begins to freeze out even before
  • B. it will undergo no change until
  • C. it will not solidify even on
  • D. none of these
    • Discuss
  • 3. The equilibrium data of component A in the two phases B and C are given below.
    Chemical Engineering Stoichiometry: The equilibrium data of component A in the two phases B and C are given below.
    The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = mX2 for the above data is

  • Options
  • A. 15.5
  • B. 16
  • C. 16.5
  • D. 17
    • Discuss
  • 4. Which of the following is not a unit of length?

  • Options
  • A. Parsec
  • B. Angstrom
  • C. Barn
  • D. Fermi
    • Discuss
  • 5. A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container

  • Options
  • A. will be greater than 298 K.
  • B. will be 298 K.
  • C. will be less than 298 K.
  • D. can not be determined.
    • Discuss
  • 6. Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is

  • Options
  • A. 20
  • B. 32.2
  • C. 45.35
  • D. 58.65
    • Discuss
  • 7. The total number of atoms in 8.5 gm of NH3 is __________ x 1023.

  • Options
  • A. 9.03
  • B. 3.01
  • C. 1.204
  • D. 6.02
    • Discuss
  • 8. Atmospheric pressure corresponds to a hydrostatic head of

  • Options
  • A. 13.6 cms of Hg
  • B. 34 ft ofH2O
  • C. 1 metre of H2O
  • D. 13.6 metres of Hg
    • Discuss
  • 9. In general, the specific heats of aqueous solutions __________ with increase in the concentration of the solute.

  • Options
  • A. increase
  • B. decrease
  • C. remain unchanged
  • D. none of these
    • Discuss
  • 10. The reaction A + B ? C has been conducted in a reactor as shown below.
    Chemical Engineering Stoichiometry: The reaction A + B ? C has been conducted in a reactor as shown below.
    The number of balances (material) that can be made around the reactor are

  • Options
  • A. 1
  • B. 2
  • C. 3
  • D. 4
    • Discuss

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