Aromatics are desired constituents of____________________?

Related Mcqs:

1. Aromatics have the highest ________________ of all the hydrocarbons of same carbon atoms?

   A. Smoke point
   B. Octane number
   C. Cetane number
   D. Viscosity

2. Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has__________________?

   A. High pour point and low smoke point
   B. Low viscosity index
   C. High self-ignition temperature
   D. All A., B. and C.

3. Presence of aromatics in __________________?

   A. Diesel increases its cetane number
   B. Kerosene increases its smoke point
   C. Petrol increases its octane number
   D. All A., B. and C.

4. In petroleum refining, the process used for conversion of hydrocarbons to aromatics is________________?

   A. Catalytic cracking
   B. Catalytic reforming
   C. Hydrotreating
   D. Alkylation

5. Furfural solvent extraction is used for upgrading (by dissolving aromatics) ?

   A. Naphtha
   B. Lubricating oils
   C. Wax
   D. Cracking feedstock

6. Which one of the following processes aims at producing higher yield of gaseous unsaturated hydrocarbons and aromatics like benzene & toluene ?

   A. Reforming
   B. Pyrolysis
   C. Alkylation
   D. Hydrocracking

7. Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is_________________?

   A. Propane
   B. Diethylene glycol
   C. Aqueous solution (10% water) of diethylene glycol
   D. Methyl ethyl ketone (MEK)

8. 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

9. Which of the following constituents present in petroleum is responsible for ash formation ?

   A. Nitrogen compounds
   B. Organometallic compounds
   C. Sulphur compounds
   D. Oxygen compounds

10. H/C ratio (by weight) for the same number of carbon atoms is the highest in case of____________________?

    A. Aromatics
    B. Paraffins
    C. Olefins
    D. Naphthenes