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51.	By which process Iron can be prepared?(a) From magnetite(b) Iron oxide(c) Oxidation of metals(d) All of the mentionedI got this question in my homework.This is a very interesting question from Catalyst topic in chapter Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» CORRECT choice is (d) All of the mentioned Best explanation: Iron catalysts may be prepared for COMMERCIAL applications by precipitation from solution, from magnetite (FE3O4) ore, or from magnetite obtained by fusion of iron oxides, or by oxidation of metallic iron with STEAM.

52.	What happens to the yield of heavier products as temperature increases?(a) Increases(b) Remains same(c) Decreases(d) None of the mentionedI had been asked this question in class test.This key question is from Catalyst topic in division Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» Correct option is (c) DECREASES To ELABORATE: The GASOLINE yield increases as the temperature increases, while the yield of HEAVIER products decreases. A similar shift of products to lighter material occurs when the alkali CONTENT of the catalyst is decreased.

53.	Iron catalysts operate over a considerably wider temperature range.(a) True(b) FalseThis question was addressed to me in an international level competition.I need to ask this question from Catalyst in chapter Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» Correct ANSWER is (a) True Easiest explanation: IRON catalysts operate over a considerably wider temperature range, 200-350°C, than do cobalt catalysts. The space velocity of operation is almost directly proportional to the PRESSURE.

54.	The magnetite catalysts are reduced to what?(a) Metallic iron(b) Metallic copper(c) Metallic zinc(d) All of the mentionedI had been asked this question in an online interview.My doubt stems from Catalyst topic in chapter Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» The correct answer is (a) Metallic IRON Easiest EXPLANATION: The magnetite catalysts are generally reduced to metallic iron with pure HYDROGEN at space VELOCITIES of 2,000hr’-1 and at 400-500°C.

55.	Complete the following reaction: 3Fe2C + 4H20 —–> 2_____ + 3C + 4H2.(a) Fe3O5(b) Fe3O4(c) Fe3O4(d) Fe2O4I got this question in examination.My question is taken from Catalyst in division Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» The CORRECT OPTION is (c) Fe3O4 The best I can explain: Carbon forming reaction is: 3Fe2C + 4H20 —–> 2Fe3O4 + 3C + 4H2.

56.	What are the catalyst poison purification of Synthesis Gas?(a) Hydrogen sulphide(b) Organic sulphur(c) All of the mentioned(d) None of the mentionedI have been asked this question in a national level competition.This is a very interesting question from Introduction in chapter Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» RIGHT choice is (c) All of the mentioned Easiest explanation: HYDROGEN sulphide and organic sulphur are CATALYST poisons and must be removed to an extremely low value, GENERALLY less than 0.1 grain of total sulphur per 100 cu ft of gas.

57.	What is the use of water-gas generators?(a) Heating oils(b) Heating water(c) Heating gas(d) None of the mentionedThis question was posed to me in exam.This key question is from Introduction topic in chapter Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» Right OPTION is (c) Heating gas Easy EXPLANATION: Water-gas generators have been widely USED to make heating gas of about 300 Btu per cu FT as well as gas for the production of hydrogen to, be used in AMMONIA synthesis.

58.	Cobalt catalyst is used when which type of products are desired?(a) Solid(b) Liquid(c) Vapour(d) None of the mentionedI had been asked this question by my school teacher while I was bunking the class.I'm obligated to ask this question of Catalyst in chapter Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» The correct answer is (B) Liquid Easy EXPLANATION: Cobalt CATALYSTS are PREFERABLE to nickel when greater yields of liquid PRODUCTS are desired.

59.	What are the commonly used catalysts for the Fischer Tropsch synthesis?(a) Nickel(b) Cobalt(c) Iron(d) All of the mentionedThe question was asked in exam.Question is from Catalyst in portion Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» The CORRECT answer is (d) All of the mentioned Explanation: Nickel, cobalt, and iron catalysts are COMMONLY used for the FISCHER Tropsch SYNTHESIS.

60.	Why does synthesis scheme has two steps?(a) Low yield(b) Less energy(c) High conversion(d) All of the mentionedThis question was addressed to me in exam.Enquiry is from Introduction topic in section Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» The correct choice is (c) High CONVERSION Explanation: TWO stages of synthesis are employed to attain a high conversion of the synthesis GAS.

61.	In which process hydroformylation of olefin to an aldehyde occurs?(a) Azo process(b) Alkyl process(c) Oxo process(d) None of the mentionedI have been asked this question in final exam.This interesting question is from Introduction topic in chapter Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» Right answer is (c) Oxo PROCESS For explanation I would say: In the Oxo process, hydroformylation of the OLEFIN to an aldehyde occurs by addition of a hydrogen atom and a formyl group to the double BOND.

62.	What type of reaction is the production of H2 and CO?(a) Exothermic(b) Endothermic(c) Neutral(d) None of the mentionedI have been asked this question in quiz.Origin of the question is Introduction in portion Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» Right CHOICE is (b) ENDOTHERMIC The explanation is: To produce hydrogen and carbon MONOXIDE, the REACTION is endothermic.

63.	What compound(s) are removed during General Synthesis Scheme?(a) Solids(b) Sulphur compounds(c) Carbon dioxide(d) All of the mentionedI have been asked this question in an interview for job.This intriguing question comes from Introduction in section Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» CORRECT answer is (d) All of the mentioned To elaborate: During general SYNTHESIS scheme gasification of COAL with steam and oxygen is followed by a purification step to ELIMINATE SOLIDS, sulphur compounds, and most of the carbon dioxide.

64.	Synthesis gas for the Fischer-Tropsch reaction consists of what?(a) Hydrogen(b) Carbon monoxide(c) Both H2 and CO(d) None of the mentionedI had been asked this question by my college director while I was bunking the class.I'm obligated to ask this question of Introduction in portion Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» Right CHOICE is (C) Both H2 and CO To elaborate: Synthesis GAS for the Fischer-Tropsch reaction consists of mixtures of hydrogen and carbon MONOXIDE in ratios of from O.7H2: 1CO to 2.5H2: 1CO.

65.	What type of reaction is synthesis of hydrocarbon?(a) Exothermic(b) Endothermic(c) Neutral(d) None of the mentionedI had been asked this question in a national level competition.This interesting question is from Introduction topic in section Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» Right answer is (a) Exothermic To explain I would SAY: Aliphatic HYDROCARBONS and oxygenated compounds can be synthesized from mixtures of HYDROGEN and carbon monoxide by REACTION over SUITABLE catalysts and are highly exothermic.

66.	What is meant by hydroformylation reaction?(a) Reaction of olefins(b) Reaction of Azos(c) Reaction of aromatics(d) All of the mentionedI have been asked this question in an internship interview.Question is from Introduction in portion Hydrocarbon Synthesis and Hydroformylation of Unit Processes
Answer» The correct choice is (a) Reaction of olefins Explanation: HYDROFORMYLATION is a reaction in which an OLEFIN is reacted with a mixture of HYDROGEN and carbon monoxide.