Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to (A) Increase its smoke point (B) Improve its oxidation stability (C) Decrease the breathing loss (D) None of these

Dearomatization of kerosene (by liquid sulphur dioxide extraction) is
done to
(A) Increase its smoke point
(B) Improve its oxidation stability
(C) Decrease the breathing loss
(D) None of these
by

1 Answer

Answer :

(B) Improve its oxidation stability
by

Related questions

Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatization by liquid SO2 extraction (Edeleanu process), its smoke point may become __________ mm. (A) 5 (B) 10 (C) 25 (D) 100

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Last Answer : (C) 25

Hydrofining is the most recent and effective method for the (A) Removal of sulphur (B) Improvement of smoke point (C) Reduction of breathing loss (D) Improvement of viscosity index

Description : Hydrofining is the most recent and effective method for the (A) Removal of sulphur (B) Improvement of smoke point (C) Reduction of breathing loss (D) Improvement of viscosity index

Last Answer : (A) Removal of sulphur

Mercapsol and Unisol processes are meant for the (A) Dearomatization of kerosene (B) Removal of mercaptans (C) Dewaxing

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Last Answer : (B) Removal of mercaptan

Solvent used in duo-sol extraction for lube oil upgradation is a mixture of (A) Propane & phenol-cresol mixture(B) Methyl ethyl ketone & glycol(C) Phenol & furfural(D) Propane & liquid sulphur dioxide

Description : Solvent used in duo-sol extraction for lube oil upgradation is a mixture of (A) Propane & phenol-cresol mixture (B) Methyl ethyl ketone & glycol (C) Phenol & furfural (D) Propane & liquid sulphur dioxide

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Cetane number of a diesel fuel is the measure of its (A) Ignition delay (B) Smoke point (C) Viscosity (D) Oxidation stability

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With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide (A) Increases(B) Increases linearly(C) Decreases(D) Decreases linearly

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Smoke point of kerosene expresses its (A) Burning characteristics (B) Luminosity characteristics (C) Aromatic content directly (D) Lamp wick wetting characteristics

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Presence of aromatics in (A) Diesel increases its cetane number (B) Kerosene increases its smoke point (C) Petrol increases its octane number (D) All (A), (B) and (C)

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Last Answer : (C) Petrol increases its octane number

Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm. (A) n-paraffins (B) Olefins (C) Aromatics (D) None of these

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Last Answer : (C) Aromatics

Smoke point of a good burning kerosene may be around __________ mm. (A) 0-5 (B) 20-25 (C) 60-75 (D) 100-120

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Extractor temperature is maintained at -20°C in Edeleanu process to reduce the __________ of kerosene. (A) Smoke point (B) Paraffins (C) Aromatics (D) Naphthenes

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Last Answer : (B) Paraffins

Smoke point of kerosene is the (A) Time after which smoking starts on burning (B) Temperature at which smoking starts (C) Maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp (D) None of these

Description : Smoke point of kerosene is the (A) Time after which smoking starts on burning (B) Temperature at which smoking starts (C) Maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp (D) None of these

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Good quality kerosene should have (A) Low smoke point (B) High smoke point (C) High aromatics content (D) Low paraffins content

Description : Good quality kerosene should have (A) Low smoke point (B) High smoke point (C) High aromatics content (D) Low paraffins content

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Pick out the wrong statement. (A) Critical moisture content is not a property of the material itself (B) A sharp increase in pressure drop gives an indication of the flooding in a distillation column (C) Separation of components is not possible in liquid extraction, if selectivity is unity (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum

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Description : An example of autothermal reactor operation is (A) Sulphur dioxide oxidation (B) Ethylene oxidation (C) Benzene oxidation (D) Ammonia synthesis

Last Answer : (B) Ethylene oxidation

The substances that cause air pollution are 1. Smoke 2. Sulphur dioxide 3. Argon 4. Carbon monoxide The correct answers are: (a) 1, 2 and 3 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 4

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Last Answer : Ans:(d)

The most common cause of pollution of air is – (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Smoke

Description : The most common cause of pollution of air is – (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Smoke

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The most common cause of pollution of air is (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Smoke

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Pick out the wrong statement. (A) With decrease in feed temperature, the number of plates required for binary distillation decreases for a given ‘L/V’ ratio (B) The extraction per unit of total height for a short packed column is more effective than for a tall column, in case of liquid-liquid extraction(C) Natural draft cooling towers are made of ferroconcrete and its cross￾section is wider at the bottom(D) Vander wall adsorption is also called chemisorption

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Sulphur dioxide bleaches colouring matter by – (1) Reduction (2) Dehydration (3) Decomposition (4) Oxidation

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Which of the following process-es does not increase the amount of carbon dioxide in air? (1) Breathing (2) Photosynthesis (3) Burning of petrol (4) Aerobic decay of vegetation

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Which of the following processes does not increase the amount of carbon dioxide in air ? (1) Breathing (2) Photosynthesis (3) Burning of petrol (4) Aerobic decay of vegetation

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Visbreaking process is used mainly for making (A) High cetane diesel (B) High octane gasoline (C) Fuel oil (D) Smoke free kerosene

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Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)? (A) Freon (B) Liquid sulphur dioxide (C) Methyl chloride (D) Ammonia

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As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages (A) Increase (B) Decrease (C) Remain unchanged

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Which of the following contains maximum sulphur? (A) Diesel (B) Petrol (C) Kerosene (D) Fuel oil

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Which of the following petroleum products contain minimum sulphur? (A) Naphtha (B) Kerosene (C) LSHS (D) Furnace oil

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Stabilisation of gasoline (petrol) means (A) Removal of dissolved gases from it (B) Increasing its oxidation stability (C) Improving its lead susceptibility (D) Increasing its vapour pressure

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From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm. (A) 5 (B) 50 (C) 500 (D) 5000

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