Carbon particles accumulated on the catalyst used in the gas oil
cracking lies in the category of __________ poison.
(A) Deposited
(B) Chemisorbed
(C) Selectivity
(D) Stability

1 Answer

Answer :

(A) Deposited

Related questions

Description : Nickel is not used as a catalyst in the __________ reaction. (A) Shift conversion (B) Oil hydrogenation (C) Steaming reforming of naphtha (D) Ammonia cracking/dissociation

Last Answer : (A) Shift conversion

Description : Minerals are deposited and accumulated in the strata of which of the following rocks ? -SST 10th

Last Answer : A - Minerals are found in layers or strata in sedimentary rocks. Minerals are accumulated in horizontal strata after being exposed to high heat and pressure for a long period of time. Coal, iron ore, gypsum, potash salt etc are formed in this way.

Description : 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 ... with increase in the catalyst to oil ratio (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : For the hydrogenation of oils, __________ (i) __________ is commonly used as catalyst and __________ (ii) __________ is a catalyst poison. (A) (i) platinum (ii) sulphur (B) (i) palladium (ii) oxygen (C) (i) nickel (ii) sulphur (D) (i) nickel (ii) oxygen

Last Answer : (C) (i) nickel (ii) sulphur

Description : Catalyst carriers (A) Have very high selectivity (B) Increase the activity of a catalyst (C) Provide large surface area with a small amount of active material (D) Inhibit catalyst poisoning

Last Answer : (C) Provide large surface area with a small amount of active material

Description : In autocatalytic reactions, (A) One of the reactants acts as a catalyst (B) One of the products acts as a catalyst (C) Catalysts have very high selectivity (D) No catalyst is used

Last Answer : (B) One of the products acts as a catalyst

Description : A catalyst inhibitor (A) Lessens its selectivity (B) May be useful for suppressing undesirable side reactions (C) Is added in small quantity during the catalyst manufacture itself (D) All (A), (B) and (C

Last Answer : (D) All (A), (B) and (C

Description : __________ catalytic reaction is involved in the thermal cracking of gas oil. (A) Homogeneous (B) Non-Homogeneous (C) Heterogeneous (D) Non-Heterogeneous

Last Answer : (A) Homogeneous

Description : The activity and selectivity of zeolites as catalyst is based on :-

Last Answer : The activity and selectivity of zeolites as catalyst is based on :- A. Their pore size B. Size of their cavities on the surface C. Both D. None

Description : . Which of the following is used as a catalyst in fluidised bed catalytic cracking? (A) Silica-magnesia (B) Silica-alumina (C) Bentonite clays (D) All (A), (B) and (C

Last Answer : (D) All (A), (B) and (C

Description : Catalyst used in the catalytic cracking is (A) Silica-alumina (B) Silica gel (C) Vanadium pentoxide (D) Nickel

Last Answer : (A) Silica-alumina

Description : Concentration of H2SO4 catalyst in alkylation is kept between 90-98%, because H2SO4 having concentration. (A) Less than 90% promotes polymerisation (B) More than 98% promotes cracking (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) and (B)

Description : Which of the following factors control the deactivation of a porous catalyst pellet? (A) Decay reactions (B) Pore diffusion (C) Form of surface attack by poison (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : __________ is the property of a soil to undergo large deformations when stressed, without cracking or crumbling due to the lubricating effect of the water films between adjacent particles. a. Bending b. Malleability c. Ductility d. Plasticity

Last Answer : d. Plasticity

Description : Which of the following is not endothermic in nature? (A) Combustion of sulphur (B) Gasification of carbon (C) Thermal cracking of fuel oil (D) Steam reforming of naphtha

Last Answer : (A) Combustion of sulphur

Description : Limit state of collapse deals with [ A ] strength and stability of the structure [ B ] conditions such as deflection, cracking [ C ] durability [ D ] all the above

Last Answer : [ A ] strength and stability of the structure

Description : Limit state of collapse deals with [ A ] strength and stability of the structure [ B ] conditions such as deflection, cracking [ C ] durability [ D ] all the above

Last Answer : [ A ] strength and stability of the structure

Description : What is Catalyst Poison ?

Last Answer : Substances that reduce or even stop the catalytic ability of catalysts are called catalysts. Usually catalysts such as dust , sulfur powder , As2O3, etc. act as toxins.

Description : The main use of heavy gas oil produced by the vacuum distillation unit is as a (A) Blending component for kerosene (B) Blending component for petrol (C) Feedstock for fluid catalytic cracking unit (D) None of these

Last Answer : (C) Feedstock for fluid catalytic cracking unit

Description : Laboratory gas is obtained by the cracking of (A) Gasoline (B) Diesel (C) Fuel oil (D) Kerosene

Last Answer : (D) Kerosene

Description : Ammonia synthesis gas is produced from fuel oil by (A) Steam reforming (B) Hydro-cracking (C) Partial oxidation (D) Hydrogenation

Last Answer : (C) Partial oxidation

Description : With increase in the temperature of carbonisation of coal (A) Hydrogen content of coke oven gas increases due to cracking ofhydrocarbons (B) Methane content in the coke oven gas decreases and carbon monoxide content increases ( ... compensated by increase in CO & H2 content (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : We hurt without moving. We poison without touching. We bear the truth and the lies. We are not to be judged by our size. What are we? -Riddles

Last Answer : Words.

Description : The stability protocol of a tablet formulation must include? A. Vendor list for raw materials B. Batch No. C. Pharmacological category of the active substance D. Layout of the manufacturing area

Last Answer : B. Batch No.

Description : Oil is hydrogenated using nickel catalyst in a __________ reactor. (A) Batch (B) Slurry (C) Fluidised bed (D) Fixed bed

Last Answer : (B) Slurry

Description : The solvent used in liquid-liquid extraction should have __________ less than one. (A) Selectivity (B) Distribution co-efficient (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (D) Neither (A) nor (B)

Description : Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m3, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is (A) 90 (B) 60 (C) 45 (D) 30

Last Answer : (B) 60

Description : A catalyst loses its activity due to (A) Loss in surface area of the active component (B) Agglomeration of metal particles caused by thermal sintering of the solid surface (C) Covering of the catalytic active sites by a foreign substance (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : Septic tanks are used for the __________ of the deposited solids. (A) Separation (B) Anaerobic decomposition (C) Aerobic decomposition (D) None of these

Last Answer : (B) Anaerobic decomposition

Description : There are three different categories of jobs A, B and C. The average salary of the students who got the job of A and B categories is Rs.32 lakh per annum. The average salary of the student who got the job of B ... 30 & 44 B) lies between 48 & 56 C) lies between 38 & 45 D) lies between 49 & 50

Last Answer : Answer: C) Let the number of students who got the jobs of A, B and C categories is a, b and c respectively, ∴Total salary of Aand B = 32 (a +b) ∴Total salary of B and C = 54 (b+ ... the minimum salary must be Rs.38 lakh and the maximum salary cannot exceed 45, which is the highest of the three..

Description : Which of the following procedures should be used to maintain a large electric motor during periods of inactivity? A. A thin layer of air-drying varnish should be applied on the windings. B. ... periodically to remove carbon dust. D. Space heaters should be used to prevent condensation of moisture.

Last Answer : Answer: D

Description : The catalytic cracking of heavier petroleum fraction is done to produce mainly (A) Gasoline (B) Asphalt (C) Diesel oil (D) Tar

Last Answer : (C) Diesel oil

Description : Which of the following processes in oil refinery does not employ ‘cracking’? (A) Coking (B) Visbreaking (C) Pyrolysis (D) None of these

Last Answer : (D) None of these

Description : Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil (A) Gives higher yield of petrol (B) Lower octane number of petrol (C) Higher sulphur content in the product (D) Higher gum forming material in petro

Last Answer : (A) Gives higher yield of petrol

Description : Which of the following is the most widely used cracking process in oil refineries? (A) Dubbs process (B) T.C.C. moving bed process (C) Fluidised bed catalytic cracking process (D) Houdry's fixed bed process

Last Answer : (C) Fluidised bed catalytic cracking process

Description : . The main aim of cracking is to produce (A) Gasoline (B) Lube oil (C) Petrolatum (D) Coke

Last Answer : (A) Gasoline

Description : Effectiveness factor of a catalyst pellet is a measure of the __________ resistance. (A) Pore diffusion (B) Gas film (C) Chemical reaction (D) None of these

Last Answer : (A) Pore diffusion

Description : __________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst. (A) N2 (B) H2 (C) CO2 (D) He

Last Answer : (A) N2

Description : Choose the correct reason(s) for the stability of the lyophobic colloidal particles.

Last Answer : Choose the correct reason(s) for the stability of the lyophobic colloidal particles. A. ... layer of opposite charges around the colloidal particles.

Description : During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the (A) Gas film (B) Liquid film (C) Liquid-gas interface

Last Answer : (B) Liquid film

Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these

Last Answer : (D) None of these

Description : Are there any methods of preventing cracking of carbon steel welds in refining environments?

Last Answer : Where carbon steel is an appropriate material of construction, NACE (National Association of Corrosion Engineers) has issued the following standard: NACE RP0472, Methods and controls to prevent in service ... shall be tested. G. Welds that exceed 200 Brinell shall be heat treated or removed.

Description : Photons and gravitons are names associated with a category of particles called: w) mesons x) bosons y) leptons z) baryons

Last Answer : ANSWER: X --BOSONS

Description : __________ polythene is most prone to stress-cracking (A) High density (B) Low density (C) Cross-linked (D) Linear low density

Last Answer : (A) High density

Description : Petroleum coke is commercially produced by the __________ process. (A) Hydrocracking (B) Visbreaking (C) Fluid catalytic cracking (D) Delayed coking

Last Answer : (D) Delayed coking

Description : In catalytic cracking process, olefins crack __________ times faster than in thermal cracking process. (A) 100 (B) 200-300 (C) 1000-10000 (D) 10

Last Answer : (C) 1000-10000

Description : Thermofor catalytic cracking process is a __________ process. (A) Fixed bed (B) Moving bed (C) Fluidised bed (D) Non-catalytic

Last Answer : (D) Non-catalytic

Description : In the fluid catalytic cracker (FCC), the cracking reaction is __________ (i) and the regeneration is__________ (ii) __________. (A) (i) exothermic (ii) endothermic (B) (i) exothermic (ii) exothermic (C) (i) endothermic (ii) endothermic (D) (i) endothermic (ii) exothermic

Last Answer : (D) (i) endothermic (ii) exothermic

Description : Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its (A) Poor oxidation stability and high gum forming ... at elevated temperature (C) Hydrolysis tendency in presence of water (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)