With increase in the molecular weight of aromatic present in kerosene, its smoking tendency ?

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. 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

3. Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ?

   A. Paraffins
   B. Naphthenes
   C. Aromatics
   D. Iso-paraffins

4. Molecular weight of crude petroleum may be around________________?

   A. 50
   B. 250
   C. 1500
   D. 5000

5. Molecular weight of petrol may be about ____________________?

   A. 40-60
   B. 100-130
   C. 250-300
   D. 350-400

6. 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

7. Pyrolysis of kerosene or natural gasoline is done to produce mainly the___________________?

   A. Olefins and aromatics
   B. Lighter paraffins
   C. Stabilised gasoline
   D. Diesel

8. Smoke point of kerosene is the_______________?

   A. Time after which smoking starts on burning
   B. Temperature at which smoking starts
   C. Maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp
   D. None of these

9. Smoke point of kerosene expresses its__________________?

   A. Burning characteristics
   B. Luminosity characteristics
   C. Aromatic content directly
   D. Lamp wick wetting characteristics

10. Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses _______________ as catalyst?

    A. Bauxite
    B. Fuller’s earth
    C. Activated clay
    D. All A., B. & C.