boiling points
molecular weight
C/H ratio
all (a), (b) and (c)
✅ The correct answer is option D.
Engineering
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2572. Coal containing large quantity of __________ are difficult to wash.
Ash
Inherent mineral matter
Free impurities
Volatile matter
✅ The correct answer is option B.
2573. Which of the following reactions is undesirable in the production of catalytically reformed gasoline ?
Dehydrogenation of naphthene
Dehydrogenation of lower paraffins
Dehydrocyclisation of higher paraffins
Isomerisation of paraffins
✅ The correct answer is option B.
2574. With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases.
Hydrogen
Methane
Unsaturated hydrocarbons
All of the above
✅ The correct answer is option A.
2575. Fischer-Tropsch method aims at the
Gasification of coal
Synthesis of gasoline (from water gas)
Hydrogenation of coal to produce gasoline
None of these
✅ The correct answer is option B.
2576. The hottest part of the flame lies in its____zone.
Non-luminous
Luminous
Yellow
Unburnt gases
✅ The correct answer is option A.
2577. Platforming is a __________ process.
moving bed
fluidised bed
non-regenerative & fixed bed
regenerative
✅ The correct answer is option C.
2578. An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating.
5
15
40
60
✅ The correct answer is option C.
2579. Natural gasoline is produced
from oil wells
in oil refineries
by natural gas stripping
none of these
✅ The correct answer is option C.
2580. Boiling range of motor gasoline is an indication of the
case of starting
rate of acceleration
vapour locking tendency
all (a), (b) and (c)
✅ The correct answer is option B.