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Home ‣ Chemical Engineering ‣ Stoichiometry See What Others Are Saying!
  • Question

  • Pick out the wrong statement.


  • Options
  • A. To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of solution A required is 40 kg.
  • B. 1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess reactant supplied is 25.
  • C. A gas bubble at a pressure of Pg is passed through a solvent with a saturation vapour pressure of Ps. If the time of passage of the bubble is long and air is insoluble in the solvent, the mole fraction of solvent in the bubble will be equal to Ps/Pg.
  • D. A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The solubility .of the solute is C1. The output rate of solids from an efficient crystalliser is (C + C1) V.

  • Correct Answer
  • A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The solubility .of the solute is C1. The output rate of solids from an efficient crystalliser is (C + C1) V. 

    • More questions

    • 1. Cellulose content in bomboo fibre is about __________ percent.

    • Options
    • A. 10
    • B. 20
    • C. 50
    • D. 85
      • Discuss
    • 2. Gold ore concentration is mostly done using

    • Options
    • A. jigging
    • B. tabling
    • C. froth floatation
    • D. elutriation
      • Discuss
    • 3. Vapor pressure of water at 100°C is about __________ bar.

    • Options
    • A. 0.1013
    • B. 1.013
    • C. 10.13
    • D. 101.3
      • Discuss
    • 4. P2O5 content in triple superphosphate is about __________ percent.

    • Options
    • A. 42-50
    • B. 15-20
    • C. 85-90
    • D. 70-75
      • Discuss
    • 5. For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell

    • Options
    • A. decreases upwards.
    • B. increases upwards.
    • C. remains same throughout.
    • D. may decrease or increase upwards depending upon whether vacuum or positive pressure would be maintained inside the shell.
      • Discuss
    • 6. Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop.

    • Options
    • A. Tank 1
    • B. Tank 2
    • C. Tank 3
    • D. Tank 4
      • Discuss
    • 7. The gas which contributes maximum to the heating value of natural gas is

    • Options
    • A. CO
    • B. CO2
    • C. H2
    • D. CH4
      • Discuss
    • 8. Pick out the wrong unit conversion.

    • Options
    • A. l kgf= 9.8 Newton.
    • B. 1 stoke = 1 m2/second.
    • C. 1 Pascal second = 10 poise.
    • D. 1 ppm = 1 ml/m3 = 1 mg/kg.
      • Discuss
    • 9. Styrene butadiene rubber is commercially manufactured by

    • Options
    • A. bulk polymerisation
    • B. suspension polymerisation
    • C. solution polymerisation
    • D. emulsion polymerisation
      • Discuss
    • 10. Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material).

    • Options
    • A. 15
    • B. 45
    • C. 65
    • D. 85
      • Discuss

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