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  • Question

  • Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by


  • Options
  • A. dilute HCI
  • B. acetic acid
  • C. concentrated H2SO4
  • D. none of these

  • Correct Answer
  • acetic acid 

    • More questions

    • 1. Rock phosphate used for the production of phosphatic fertiliser is mined at

    • Options
    • A. Amjhor (Jharkhand)
    • B. Talchar (Orissa)
    • C. Bailladella (M.P.)
    • D. Kiriburu (Bihar)
      • Discuss
    • 2. In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

    • Options
    • A. outlet flow rate
    • B. level
    • C. both (a) & (b)
    • D. neither (a) nor (b)
      • Discuss
    • 3. 'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the

    • Options
    • A. pressure
    • B. temperature
    • C. both (a) & (b)
    • D. neither (a) nor (b)
      • Discuss
    • 4. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.

    • Options
    • A. 5
    • B. 15
    • C. 7.5
    • D. 50
      • Discuss
    • 5. Reaction of nitric acid and sulphuric acid with phosphate rock produces

    • Options
    • A. nitrophosphate
    • B. diammonium phosphate
    • C. tricresyl phosphate
    • D. tributyl phosphate
      • Discuss
    • 6. Polarograph is meant for the analysis of

    • Options
    • A. gaseous mixture
    • B. miscible liquids
    • C. solids
    • D. isotopes
      • Discuss
    • 7. Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of

    • Options
    • A. comparatively higher pressure drop.
    • B. high cost of the high pressure vessel used for the reactor.
    • C. higher pumping cost.
    • D. chances of entrainment and disturbance of catalyst bed.
      • Discuss
    • 8. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher

    • Options
    • A. densities
    • B. melting point
    • C. tensile strength
    • D. hardness, rigidity & brittleness
      • Discuss
    • 9. Reaction of anhydrous liquid ammonia with orthophosphoric acid produces

    • Options
    • A. ammonium phosphate
    • B. superphosphate
    • C. triple superphosphate
    • D. none of these
      • Discuss
    • 10. Raw materials for nitric acid manufacture are

    • Options
    • A. hydrogen peroxide, air and water.
    • B. anhydrous ammonia and air.
    • C. anhydrous ammonia, air and water.
    • D. wet ammonia, air and water.
      • Discuss

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