A. Paraffins
B. Diolefins
C. Aromatics
D. Naphthenes
Related Mcqs:
- Gum formation in stored gasoline is mainly due to the ____________________?
A. Alkylation of unsaturated
B. Presence of sulphur
C. Oxidation & polymerisation of unsaturated
D. Higher aromatic content - Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ?
A. Paraffins
B. Naphthenes
C. Aromatics
D. Iso-paraffins - Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of ____________________?
A. Thermal cracking
B. Gum formation
C. Coking
D. Discoloration - 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 - With increase in the molecular weight of aromatic present in kerosene, its smoking tendency ?
A. Increases
B. Decreases
C. Remain same
D. Is unpredictable - Which of the following has the highest flash point of all ?
A. Diesel
B. Kerosene
C. Petrol
D. Furnace oil - Which of the following categories of gasoline has the highest lead susceptibility ?
A. Straight run gasoline
B. Platinum reformed gasoline
C. Catalytical cracked gasoline
D. Polymer gasoline - Which of the following has the highest octane number ?
A. Aromatics
B. i-paraffins
C. Naphthenes
D. Olefins - Which of the following has the highest viscosity of all (at a given temperature) ?
A. Naphtha
B. Fuel oil
C. Light diesel oil
D. Petrol - 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
