A. Low boiling sulphur compounds
B. Added in LPG cylinders to detect gas leakage by its smell
C. Undesirable in petrol, as they reduce its octane number
D. All A., B. and C.
Related Mcqs:
- Mercaptans is represented as (where R and R’ are alkyl groups) _____________________?
A. R-COOH
B. R-S-H
C. R-S-R
D. R-S-R’ - Mercaptans are added to liquefied petroleum gas (LPG) to _____________________ ?
A. Reduce its cost
B. Narrow down its explosion limit
C. Assist in checking its leakage from cylinder
D. Increase its calorific value - Solution used in Doctor’s treatment for the removal of mercaptans is_________________?
A. Sodium hydroxide
B. Sodium plumbite
C. Cupric chloride
D. Potassium isobutyrate - In catalytic cracking, the___________________?
A. Gasoline obtained has a very low octane number
B. Pressure & temperature is very high
C. Gasoline obtained has very high aromatic content
D. Gasoline obtained has very high amount of gum forming compounds - Octane number (unleaded) of gasoline produced by isomerisation of butane may be about __________________?
A. 45
B. 55
C. 70
D. 90 - Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely miscible. It means that the aniline point of the diesel is _______________ the room temperature?
A. More than
B. Less than
C. Same as
D. Either more or less; depends on the room temperature - 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 - Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about ________________ mm Hg absolute?
A. 1 to 5
B. 30 to 80
C. 250 to 350
D. 450 to 500 - The amount of tetraethyl lead added to improve the octane number of motor gasoline is around ______________ c.c per gallon of petrol?
A. 3
B. 300
C. 3000
D. 1000 - Petroleum ________________ ?
A. Is optically active
B. Constitutes mainly of olefins
C. Does not contain asphalt
D. Does not contain aromatics
