Description : In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO2 to SO3 is accomplished by a __________ reaction. (A) Non-catalytic homogeneous (B) Non-catalytic heterogeneous (C) Catalytic homogenous (D) Catalytic heterogeneous
Last Answer : (C) Catalytic homogenous
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 : 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 : Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of ... to (B) Independent of (C) Inversely proportional to (D) Proportional to the square o
Last Answer : (A) Proportional to
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 : For a heterogeneous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is (A) Surface Kc /(1 + TS ) ... A and absorbed B (C) Surface reaction between A in the gas phase and absorbed B (D) Desorption of C
Last Answer : (D) Desorption of C
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 : Pick out the wrong statement. (A) Higher temperature is employed in visbreaking than in thermal cracking (B) Pyrolysis is a mild thermal cracking process (C) Lead susceptibility of ... Operating pressure and temperature in thermal cracking process is more than that in catalytic cracking process
Last Answer : (A) Higher temperature is employed in visbreaking than in thermal cracking (B) Pyrolysis is a mild thermal cracking process
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 : 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 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 : 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 a heterogeneous catalytic reaction (A) Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction (B) A relatively small amount of catalyst ... with the reactant (D) The surface of the catalyst does not play an important role during reaction
Last Answer : (A) Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
Description : The rate expression for a heterogeneous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR ... R and A) (A) E (B) E + ΔHA (C) E + ΔHA - ΔHR ) (D) ΔHA + ΔHR
Last Answer : (C) E + ΔHA - ΔHR )
Description : Name the endothermic reaction out of the following: (A) Catalytic cracking (B) Hydrocracking (C) Dehydrogeneration of Naphthene to produce aromatic (D) Catalytic polymerisation
Last Answer : (C) Dehydrogeneration of Naphthene to produce aromatic
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 : Vegetable oils are hydrogenated in a __________ reactor. (A) Slurry (B) Plug flow (C) Homogeneous catalytic (D) None of these
Last Answer : (A) Slurry
Description : __________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction. (A) Gas film diffusion (B) Ash diffusion (C) Chemical reaction (D) None of these
Last Answer : (C) Chemical reaction
Description : If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion. (A) Film (B) Ash layer (C) Pore (D) None of these
Last Answer : (A) Film
Description : Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction? (A) Ash resistance (B) Gas film and pore surface diffusion resistances for reactants (C) Surface phenomenon resistance (D) Gas film and pore surface diffusion resistances for products
Last Answer : (A) Ash resistance
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 : 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 : . 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 : Which of the following processes consumes hydrogen? (A) Fluid catalytic cracking (B) Visbreaking (C) Propane deasphalting (D) None of these
Last Answer : (A) Fluid catalytic cracking
Description : In petroleum refining, the process used for conversion of hydrocarbons to aromatics is (A) Catalytic cracking (B) Catalytic reforming (C) Hydrotreating (D) Alkylation
Last Answer : (B) Catalytic reforming
Description : Asphalts are (A) Low molecular weight & low boiling point compounds present in petroleum (B) Desirable in catalytic cracking feedstock, because they produce coke (C) Readily oxidisable and form carbonaceous sludge (D) All (A), (B) & (C)
Last Answer : (C) Readily oxidisable and form carbonaceous sludge
Description : Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic (A) Cracking (B) Polymerisation (C) Reforming (D) Isomerisation
Last Answer : (C) Reforming
Description : Octane number of gasoline produced by two stage fluidised catalytic cracking process is (A) 80 (B) 87 (C) 92 (D) 97
Last Answer : (D) 97
Description : Pressure & temperature maintained in catalytic cracking is about (A) 2 atm & 500°C (B) 10 atm & 500°C (C) 30 atm & 200°C (D) 50 atm & 750°C
Last Answer : (A) 2 atm & 500°C
Description : 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
Last Answer : (C) Gasoline obtained has very high aromatic content
Description : From among the following, choose one which is not an exothermic process. (A) Methanol synthesis (B) Catalytic cracking (C) Ammonia synthesis (D) Oxidation of sulphu
Last Answer : (B) Catalytic cracking
Description : Commercially ethylene is produced from naphtha by (A) Catalytic cracking (B) Catalytic dehydrogenation (C) Pyrolysis (D) Hydrocracking
Last Answer : (D) Hydrocracking
Description : 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
Last Answer : (A) Deposited
Description : Pick out the wrong statement. (A) Lower boiling paraffins have higher octane number than higher paraffins (B) Dehydrogenation of naphthenes to aromatics is a desirable reaction in reforming ... is dearomatised kerosene (D) Catalyst used in catalytic reforming is platinum on silica-alumina base
Last Answer : (C) The most ideal feedstock for thermal reforming is dearomatised kerosene
Description : For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the ... through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)
Description : Non-catalytic fluid-solid reactions are represented by __________ model. (A) Continuous reaction (B) Unreacted core (C) Both (A) and (B) (D) Neither (A) and (B)
Last Answer : (C) Both (A) and (B)
Description : For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, ... through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)
Last Answer : (B) Diffusion through ash layer
Description : Classify the following mixtures as homogeneous and heterogeneous. (i)Tincture of iodine (iv)Sugar solution (ii)Smoke (iii)Brass -Chemistry
Last Answer : In the above classification, tincture of iodine, brass and sugar are homogenous mixture while the smoke is heterogeneous mixture. Tincture of iodine is a liquid solution, brass is an alloy made ... component. Smoke on other hand is composed of moisture and gas thus making the mixture heterogeneous.
Description : Distinguish between homogeneous and heterogeneous mixture. -Chemistry
Last Answer : A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly ... or phases. ... Particle size distinguishes homogeneous solutions from other heterogeneous mixtures.
Description : Is peanut butter a homogeneous or a heterogeneous?
Last Answer : Heterogeneous. You can see the different parts: bread, peanutbutter.
Description : Is trail mix a homogeneous or heterogeneous?
Last Answer : I think it's heterogeneous.In my chemistry book it says:"Heterogeneous mixtures composed of liquids and solids are oftenseparated by filtration. The mixture is poured through a piece ofpaper, ... pass through but catches thesolid."Homogeneous cannot be separated by filtration.ie. salty seawater.
Description : Is saltwater a homogeneous or heterogeneous?
Last Answer : it is a homogeneous mixture because you cant physically takeyour hands and separate it like a salad where you can remove thetomatoes, carrots, etc...
Description : What is the Pizza is that Homogeneous or heterogeneous?
Last Answer : Heterogeneous
Description : Is water heterogeneous or homogeneous?
Last Answer : Water is homogeneous.-------------------------------------------------Actually natural water is heterogeneous as it is a mixture ofH2O and a very tiny ... mass than H2O and slightly different chemical properties.However for ordinary practical purposes the presence of this D2Ocan usually be ignored.
Description : Is lithium iodide a homogeneous or heterogeneous?
Last Answer : Lithium iodide is a homogeneous chemical compound.
Description : Is platinum ore a heterogeneous or homogeneous?
Last Answer : homogenous
Description : Is a wedding cake a homogeneous mixture or a heterogeneous mixture?
Last Answer : Wedding cake is a heterogeneous mixture.
Description : Is titanium a element compound homogeneous mixture or a heterogeneous mixture?
Last Answer : Titanium is a chemical element.
Description : Is hot fudge sundae homogeneous or heterogeneous mixture?
Last Answer : This is a heterogeneous mixture.