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  • Question

  • The heat evolved in the combustion of benzene is represented by the equation:
        C6H6 + 7.5 O2 = 6CO2 + 3H2O, ?H = 3264.6 kJ/kg. mole
    The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be __________ kJ/kgmole.


  • Options
  • A. +816.15
  • B. +1632.3
  • C. -1632.3
  • D. -2448.45

  • Correct Answer
  • -1632.3 

    • More questions

    • 1. Carbon/hydrogen ratio (by weight) is maximum (out of following) for

    • Options
    • A. gasoline
    • B. kerosene
    • C. light gas oil
    • D. heavy fuel oil
      • Discuss
    • 2. Salt content in sea water is about __________ percent.

    • Options
    • A. 0.5
    • B. 1
    • C. 3.5
    • D. 10
      • Discuss
    • 3. Refractoriness/fusion points of 'superduty' refractories is __________ °C.

    • Options
    • A. 1520-1630
    • B. 1630-1670
    • C. > 1730
    • D. > 2000
      • Discuss
    • 4. Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds

    • Options
    • A. 4000
    • B. 2100
    • C. 1500
    • D. 3000
      • Discuss
    • 5. Plastic tubes & pipes are generally made by __________ moulding.

    • Options
    • A. injection
    • B. transfer
    • C. extrusion
    • D. compression
      • Discuss
    • 6. pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.

    • Options
    • A. 4-5
    • B. 7-8
    • C. 9-10
    • D. 12-13
      • Discuss
    • 7. Sphericity of pulverised coal is

    • Options
    • A. 1
    • B. <1
    • C. >1
    • D. ?
      • Discuss
    • 8. Coolant used in a boiling water reactor is

    • Options
    • A. hydrogen gas
    • B. water
    • C. steam
    • D. a mixture of water & steam
      • Discuss
    • 9. Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight.

    • Options
    • A. 85
    • B. 65
    • C. 50
    • D. 98
      • Discuss
    • 10. Reciprocal of sphericity is termed as the

    • Options
    • A. specific surface ratio
    • B. shape factor
    • C. sauter diameter
    • D. surface area per unit mass
      • Discuss

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