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  • Question

  • Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?


  • Options
  • A. Iso propyl alcohol
  • B. Butyl alcohol
  • C. Toluene
  • D. Hexane

  • Correct Answer
  • Butyl alcohol 

    • More questions

    • 1. Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C.

    • Options
    • A. 1380
    • B. 1520
    • C. 1710
    • D. 1915
      • Discuss
    • 2. Higher viscosity of lubricating oil usually signifies

    • Options
    • A. lower Reid vapour pressure.
    • B. higher acid number.
    • C. higher flash point and fire point.
    • D. lower flash point and fire point.
      • Discuss
    • 3. Lap joints are preferred for plates having thickness __________ mm.

    • Options
    • A. < 12.5
    • B. > 3
    • C. > 5
    • D. 5-10
      • Discuss
    • 4. Combustion of fuel in a furnace with oxygen enriched air results in higher

    • Options
    • A. flue gas volume
    • B. flame temperature
    • C. fuel consumption
    • D. stack loss
      • Discuss
    • 5. Which of the following has the lowest viscosity (at a given temperature) of all?

    • Options
    • A. Naphtha
    • B. Kerosene
    • C. Diesel
    • D. Lube oil
      • Discuss
    • 6. Which of the following is not used as a medium for high temperature heating?

    • Options
    • A. Dowtherm
    • B. mercury
    • C. liquid metal (e.g. molten sodium)
    • D. fused salts (e.g., an eutectic mixture of 53% KNO3, 40% NaNO2and 7% NaNO3)
      • Discuss
    • 7. Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex?

    • Options
    • A. Ammonium alum
    • B. Potassium alum
    • C. both a & b
    • D. neither a nor b
      • Discuss
    • 8. The main use of butadiene is

    • Options
    • A. as a plasticiser for unsaturated polyester.
    • B. in the manufacture of synthetic rubber.
    • C. as an anti-skimming agent in paint.
    • D. none of these.
      • Discuss
    • 9. Which is a regenerative furnace?

    • Options
    • A. Coke oven heating chamber.
    • B. Open hearth furnace.
    • C. Both (a) and (b).
    • D. Neither (a) nor (b).
      • Discuss
    • 10. Cost of piping in a fluid processing unit (e.g., distillation) of a chemical process plant is about __________ percent of the fixed capital investment.

    • Options
    • A. 4
    • B. 13
    • C. 22
    • D. 34
      • Discuss

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