A. Higher specific gravity of petroleum products means higher C/H ratio
B. Aromatics have lower specific gravity than corresponding paraffins
C. Hydrocarbons of low specific gravity (e.g., paraffins) possess the maximum thermal energy per unit volume
D. Hydrocarbons of high specific gravity (e.g., aromatics) possess the maximum thermal energy per unit weight
Related Mcqs:
- Pick out the wrong statement ?
A. A pale color of petroleum product indicates lower viscosity
B. Color of petroleum products indicates the degree of refinement
C. Lighter petroleum distillates are lighter in color than the heavier residual oils
D. Fluorescence of oils helps to detect its adulteration - Pick out the wrong statement?
A. Higher temperature is employed in visbreaking than in thermal cracking
B. Pyrolysis is a mild thermal cracking process
C. Lead susceptibility of petrol produced by catalytic process is more than that produced by
thermal cracking
D. Operating pressure and temperature in thermal cracking process is more than that in catalytic
cracking process - 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 - Pick out the wrong statement ?
A. Alkylation produces a larger iso-paraffin (having higher octane number) from the reaction of an olefin with smaller iso-paraffin
B. Catalytic alkylation processes use HF, AlCl3 & H2SO4 as Catalysts
C. All the alkylation processes use very high temperature (> 1000°C)
D. Gasoline having an octane number of 90 can be produced by alkylation process - Pick out the wrong statement ?
A. Iso-paraffin crack faster than n-paraffin.
B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic
C. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking
D. None of these - Pick out the wrong statement ?
A. Pensky-Marten apparatus is used for determining flash points above 50°C
B. Characterisation factor of paraffinic crude oil is more than 12
C. Abel apparatus is used for determining flash points below 50°C
D. An oil having high susceptibility to change in viscosity with temperature changes, has a high viscosity index - Pick out the wrong statement?
A. Aromatics have higher specific gravity than paraffins
B. Gross calorific value (GCV) of petrofuels is equal to (12400 – 2100 ρ2) where, ρ is the specific gravity of the fuel at 15.5°C
C. Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)
D. Higher specific gravity of petrofuels means higher C/H ratio - Pick out the wrong statement?
A. Multigrade lubricating oils have high viscosity index
B. Paraffinic oil has very high viscosity index
C. Naphthenic oil has very low viscosity index
D. High viscosity index means a large change in viscosity with change in temperature - Pick out the correct statement pertaining to catalytic cracking ?
A. With increase in the reactor pressure, octane number of gasoline decreases
B. With increase in the reactor temperature, gasoline yield decreases for a given conversion
C. Percentage conversion increases with increase in the catalyst to oil ratio
D. All A., B. and C. - Pick out the correct statement about catalytic polymerisation ?
A. H2SO4 polymerisation process gives gasoline rich in unsaturates
B. In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho
H3PO4 formation, which are inactive
C. Both A. and B.
D. Neither A. nor B.
