Which is the most undesirable component in kerosene ?

Related Mcqs:

1. Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than ________________ mg/kg of kerosene?

   A. 1
   B. 20
   C. 100
   D. 500

2. Which of the following is desirable in diesel and kerosene but is undesirable in gasoline ?

   A. Aromatics
   B. Mercaptans
   C. Paraffins
   D. Naphthenic acid

3. Which of the following is desirable in petrol (gasoline) but undesirable in kerosene ?

   A. Paraffins
   B. Aromatics
   C. Mercaptans
   D. Naphthenic acid

4. Which is the most desirable component of a good quality kerosene ?

   A. i-paraffins
   B. Aromatics
   C. n-paraffins
   D. Naphthenes

5. Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene ?

   A. Smoking tendency of hydrocarbons increases in the order: paraffins → isoparaffins →
   naphthenes → aromatics
   B. Smoking tendency of paraffins increases with decrease in its molecular weight
   C. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on
   addition of double bond
   D. Smoking tendency of aromatics decreases with increase in its molecular weight

6. Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to________________?

   A. Increase its smoke point
   B. Improve its oxidation stability
   C. Decrease the breathing loss
   D. None of these

7. Extractor temperature is maintained at -20°C in Edeleanu process to reduce the ______________ of kerosene?

   A. Smoke point
   B. Paraffins
   C. Aromatics
   D. Naphthenes

8. Illuminating characteristics of kerosene is expressed by its_____________?

   A. Smoke point
   B. Aniline point
   C. Luminosity number
   D. Aromatic content

9. Smoke point of a test sample of kerosene is found to be 15 mm. On removal of ________________ from it, the smoke point rises to 25 mm?

   A. n-paraffins
   B. Olefins
   C. Aromatics
   D. None of these

10. Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatization by liquid SO2 extraction (Edeleanu process), its smoke point may become _______________________ mm?

    A. 5
    B. 10
    C. 25
    D. 100