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Home Chemical Engineering Stoichiometry See What Others Are Saying!
  • Question
  • The OH- concentration in a solution having pH value 3 is


  • Options
  • A. 10-3
  • B. 10-10
  • C. 10-11
  • D. 10-13

  • Correct Answer
  • 10-11 


  • More questions

    • 1. Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C.

    • Options
    • A. 1520
    • B. 1630
    • C. 1670
    • D. 1730
    • Discuss
    • 2. Fireclay refractories have

    • Options
    • A. low co-efficient of thermal expansion.
    • B. poor thermal spalling resistance.
    • C. tendency to expand unduly high during firing.
    • D. very high cost.
    • Discuss
    • 3. BOD of raw municipal sewage may be in the range of about __________ mg/litre.

    • Options
    • A. 1-2
    • B. 5-10
    • C. 150-300
    • D. 2000-3000
    • Discuss
    • 4. Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ?= density of particles)

    • Options
    • A. m/? . Vp
    • B. m . ?/Vp
    • C. m . Vp/?
    • D. Vp/m . ?
    • Discuss
    • 5. __________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.

    • Options
    • A. Calcium
    • B. Fluorine
    • C. Phosphorous
    • D. Sulphur
    • Discuss
    • 6. The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.

    • Options
    • A. pressure
    • B. volume
    • C. viscosity
    • D. all (a), (b) and (c)
    • Discuss
    • 7. Fusion temperature of pure silica (SiO2) is __________ °C.

    • Options
    • A. 1350
    • B. 1715
    • C. 2570
    • D. 2800
    • Discuss
    • 8. 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
    • 9. 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
    • 10. '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


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