A. Octane number of i-octane is zero
B. Octane number of paraffins increases with increasing number of carbon atoms
C. Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms
D. The aromatics have lower octane number than naphthenes with same number of carbon atoms
Related Mcqs:
- Choose the correct statement regarding thermal cracking ?
A. Moderate changes in operating temperature does not change the depth of cracking
B. Increased residence time results in the decreased severity of cracking
C. At low pressure, the yield of lighter hydrocarbons are more
D. Greater depth of cracking gives lower octane number gasoline - Choose the correct statement?
A. Coking tendency increases with increasing molecular weight
B. Coking tendency decreases with increasing molecular weight
C. Higher pressure enhances coke formation
D. Coking is an exothermic reaction - 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. - Pick out the correct statement?
A. Paraffins have higher octane number than corresponding iso-paraffin
B. Paraffins have lower smoke point than aromatics
C. Suitability of kerosene as a fuel & as an illuminant may be determined by char value test
D. Aviation fuel should have very high cloud point - 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 ?
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
