122 + Interview Questions in Hydrogenation in Unit Processes Page 1 InterviewSolution

1.	What is the temperature range of middle oil?(a) 50-80°C(b) 100-150°C(c) 140-180°C(d) 200-400°CI had been asked this question in an international level competition.The question is from Industrial Processes-III in section Hydrogenation of Unit Processes
Answer» Right CHOICE is (d) 200-400°C Explanation: A portion of this product BOILING in the range of about 200-400°C is commonly termed MIDDLE oil, and it may contain 10-20 per cent of phenol. Products boiling above the middle oil are recycled to the liquid-phase HYDROGENATION step.

Discussion

2.	What is/are the raw materials for liquefaction process?(a) Lignite(b) Bituminous(c) Anthracite(d) All of the mentionedThe question was asked by my school teacher while I was bunking the class.My question is taken from Industrial Processes-III in division Hydrogenation of Unit Processes
Answer» Right option is (d) All of the mentioned To explain: All TYPES of LIGNITE and most bituminous coals, except those which have PROGRESSED too far in the coalification process, such as anthracite, are satisfactory RAW materials for liquefaction.

Discussion

3.	In second stage, hydrocarbons are converted to _____ in hydrogenation of gas oils?(a) Gasoline range(b) Liquid-line range(c) Solid range(d) All of the mentionedThis question was posed to me by my college director while I was bunking the class.My doubt is from Industrial Processes-III in chapter Hydrogenation of Unit Processes
Answer» Correct answer is (a) Gasoline range Easiest explanation: The middle OIL is further hydrogenated in a SECOND, or vapour-phase hydrogenation to CONVERT it into HYDROCARBONS in the gasoline BOILING range, i.e., those which boil to about 200°C atmospheric pressure.

Discussion

4.	What is meant by pasting oil?(a) High melting point(b) Low boiling point(c) High boiling point(d) None of the mentionedThis question was posed to me in an online interview.This interesting question is from Industrial Processes-III in division Hydrogenation of Unit Processes
Answer» Right choice is (c) High boiling point Easiest explanation: The coal is first MIXED with a high-boiling oil, called a PASTING oil, and this mixture is FORCED into the high-pressure REACTION chamber.

Discussion

5.	Coal is a complex mixture of very _____ molecular-weight compounds.(a) Low(b) High(c) Moderate(d) None of the mentionedI got this question by my school teacher while I was bunking the class.This interesting question is from Industrial Processes-III in section Hydrogenation of Unit Processes
Answer» Right choice is (b) High To explain I WOULD SAY: Coal is a COMPLEX mixture of very high-molecular-weight compounds which apparently exist as an elaborate network of carbon RINGS.

Discussion

6.	Which type of reaction is hydrogenation of gas oils?(a) Endothermic(b) Exothermic(c) Neutral(d) None of the mentionedThe question was asked in class test.The question is from Industrial Processes-III in chapter Hydrogenation of Unit Processes
Answer» Correct OPTION is (b) Exothermic The best explanation: There is a net evolution of HEAT, for the reaction is exothermic. To control the temperature, INTERMEDIATE cooling is sometimes effected by adding cold RECYCLE gas at suitable POINTS in the reactors.

Discussion

7.	Which one of the following is an effective catalysts for converting gas oil?(a) Molybdenum(b) Aluminum(c) Nickel(d) All of the mentionedI have been asked this question during an interview.My question is taken from Industrial Processes-III in chapter Hydrogenation of Unit Processes
Answer» The correct option is (a) Molybdenum Easy explanation: Molybdenum and tungsten sulphides are effective catalysts for converting GAS oil into lower-molecular-weight and more saturated products. Such catalysts are not POISONED by SULPHUR COMPOUNDS in the oils.

Discussion

8.	Catalysts for the vapour-phase converts ______ to hydrocarbons?(a) Sulphur(b) Oxygen(c) Nitrogen(d) All of the mentionedThe question was posed to me in a national level competition.The above asked question is from Industrial Processes-III in portion Hydrogenation of Unit Processes
Answer» Right OPTION is (d) All of the mentioned For explanation I would SAY: Catalysts for the vapour-phase step have to be SULPHUR-resistant and be able to CONVERT sulphur, oxygen, and nitrogen-containing compounds to hydrocarbons.

Discussion

9.	Hydrogenation of coal is not a sensitive reaction.(a) True(b) FalseI had been asked this question by my school principal while I was bunking the class.I want to ask this question from Industrial Processes-III in portion Hydrogenation of Unit Processes
Answer» The correct choice is (b) False To ELABORATE: In the Hydrogenation of coal, the reaction is HIGHLY sensitive to changes in temperature because of the high-molecular-weight compounds PRESENT in the coal. Great care must be taken to AVOID overheating, particularly during the preheating operations; otherwise, the components of the coal that still have their original molecular structure will TEND to form coke and inert products not suitable for further hydrogenation.

Discussion

10.	The processing of tar is much easier than that of coal.(a) True(b) FalseThe question was posed to me in homework.My doubt stems from Industrial Processes-II topic in section Hydrogenation of Unit Processes
Answer» Correct answer is (a) True The explanation is: The PROCESSING of TAR is much EASIER than that of coal, and the operation is more closely RELATED to PETROLEUM hydrogenation than coal hydrogenation.

Discussion

11.	What is meant by pryolozation of high-molecular-weight petroleum fractions?(a) Hydrogenation(b) No hydrogenation(c) Oxidation(d) All of the mentionedThis question was addressed to me by my school principal while I was bunking the class.This key question is from Industrial Processes-II in section Hydrogenation of Unit Processes
Answer» The correct option is (b) No hydrogenation Easy explanation: If high-molecular-weight petroleum FRACTIONS are SIMPLY pryolyzed, i.e., if no hydrogenation occurs, then progressive cracking and polymerization generally lead to the final products: (1) gaseous and low-boiling liquid compounds of high hydrogen content, (2) liquid material of intermediate molecular weight and a hydrogen: carbon ratio differing more or less from that of the original feedstock, depending on the method of operation, and (3) liquid material of high molecular weight, such as tar and petroleum coke, possessing a LOWER ratio of hydrogen: carbon than the starting material.

Discussion

12.	What does manufactured-gas and coke-oven industries produce?(a) Oils(b) Ashes(c) Tars(d) All of the mentionedI had been asked this question during an interview.This intriguing question comes from Industrial Processes-II in division Hydrogenation of Unit Processes
Answer» Right option is (c) Tars For EXPLANATION: The manufactured-gas and coke-oven industries produce large quantities of tars, and these can be HYDROGENATED to produce satisfactory MOTOR or diesel fuels.

Discussion

13.	What is/are the use(s) of extra hydrogen?(a) Hydrotreating(b) As fuel(c) For manufacturing(d) All of the mentionedThis question was posed to me during a job interview.My doubt stems from Industrial Processes-II in division Hydrogenation of Unit Processes
Answer» Right choice is (d) All of the mentioned The explanation is: The EXCESS hydrogen is VENTED from the unit and used (1) in HYDRO treating, (2) as a FUEL, or (3) for manufacture of chemicals (ammonia, etc.).

Discussion

14.	Hydrogenation of petroleum oils is/are classified in what?(a) Destructive(b) Non-destructive(c) Both destructive and non-destructive(d) None of the mentionedThe question was asked in an interview for internship.My query is from Industrial Processes-II in portion Hydrogenation of Unit Processes
Answer» RIGHT answer is (c) Both destructive and non-destructive Easy explanation: Hydrogenation processes for the conversion of PETROLEUM oils and petroleum products may be CLASSIFIED as destructive and non-destructive.

Discussion

15.	The operating hydrogenation processes is divided into 3 parts.(a) True(b) FalseThis question was addressed to me in unit test.The above asked question is from Industrial Processes-II topic in portion Hydrogenation of Unit Processes
Answer» Correct answer is (b) False To EXPLAIN: The operating hydrogenation PROCESSES, it has been found advantageous to divide them into two PARTS: (1) liquid-PHASE reactions, where PULVERIZED coal and pasting oil or heavy oils are contacted with hydrogen, and (2) gas-phase reactions, where the light oil exists practically entirely in the gas phase during hydrogenation.

Discussion

16.	What is meant by gasoline specifications?(a) Sulphur content(b) Stability(c) Oxidation(d) All of the mentionedThis question was posed to me in class test.I want to ask this question from Industrial Processes-II topic in section Hydrogenation of Unit Processes
Answer» Right ANSWER is (d) All of the mentioned For EXPLANATION I WOULD say: The gasoline SPECIFICATIONS are concerned with sulphur content, gum-forming materials, general stability and resistance to chemical change or oxidation, and DETONATION and volatility characteristics.

Discussion

17.	The yield of liquid reaction products during hydrogenation depends on what?(a) Solidification(b) Liquefaction(c) Gasification(d) None of the mentionedThis question was addressed to me during an interview.Question is from Industrial Processes-II in section Hydrogenation of Unit Processes
Answer» Correct CHOICE is (c) Gasification To elaborate: The yield of LIQUID reaction PRODUCTS will depend on the amount of gasification during HYDROGENATION.

Discussion

18.	The hydrogen consumed in the process depends on what?(a) Raw materials(b) Products(c) Low-boiling hydrocarbons(d) All of the mentionedI got this question during a job interview.I'd like to ask this question from Industrial Processes-II topic in chapter Hydrogenation of Unit Processes
Answer» Right choice is (d) All of the mentioned Explanation: The HYDROGEN consumed in the process OBVIOUSLY DEPENDS on the DIFFERENCE in hydrogen content of the raw material and finished product and on the extent to which gases containing methane and other low-boiling hydrocarbons are FORMED.

Discussion

19.	Which type of reaction is hydrogenation?(a) Exothermic(b) Endothermic(c) Neutral(d) None of the mentionedThis question was addressed to me during an online interview.Question is taken from Industrial Processes-II topic in chapter Hydrogenation of Unit Processes
Answer» Right answer is (a) Exothermic Explanation: Hydrogenations are usually exothermic, but the AMOUNT of heat liberated depends on the proportion of hydrogen CONSUMED and the NATURE of the PROCESS.

Discussion

20.	What is the purposes of hydrogenating hydrocarbons?(a) Improving petroleum products(b) Convert low to heavy oils(c) Transform solid fuels(d) All of the mentionedThe question was posed to me during an interview for a job.This interesting question is from Industrial Processes-II topic in section Hydrogenation of Unit Processes
Answer» Correct ANSWER is (d) All of the mentioned The EXPLANATION is: The purposes of hydrogenating hydrocarbons, petroleums, tars, and coals are (1) to improve existing petroleum products or develop NEW uses and products, (2) to convert inferior or low-grade materials such as HEAVY OILS and tars into valuable petroleum products, and (3) to transform solid fuels such as lignite and coals into liquid fuels.

Discussion

21.	Which is the active catalyst for hydrogenation of lauryl ester?(a) Nickel(b) Copper-ammonium chromate(c) Aluminium oxide(d) Potassium permanganateI had been asked this question by my college professor while I was bunking the class.This interesting question is from Industrial Processes-II topic in division Hydrogenation of Unit Processes
Answer» CORRECT option is (B) Copper-ammonium chromate To elaborate: An active catalyst for hydrogenating the lauryl ESTER of coconut oil FATTY acid is MADE by decomposing copper-ammonium chromate at 350-400°C.

Discussion

22.	The oil-hardening processes use which type of compounds?(a) Long-chain acids(b) Esters(c) Saturates(d) All of the mentionedThis question was addressed to me in a national level competition.This is a very interesting question from Industrial Processes-II in section Hydrogenation of Unit Processes
Answer» CORRECT choice is (d) All of the mentioned For explanation I would say: The oil-hardening processes use long-CHAIN acids and esters and saturate only the olefinic linkages in the carbon chain; in the reductions to be described here, the carboxyl group (-COOH) is changed to an alcohol group (-CH20H), and the olefinic bonds in the chain MAYOR may not be REDUCED at the same TIME.

Discussion

23.	The fuels can have a wide range of octane or cetane numbers.(a) True(b) FalseThe question was asked by my school principal while I was bunking the class.The question is from Industrial Processes-II in portion Hydrogenation of Unit Processes
Answer» Right option is (a) True To explain I WOULD SAY: The olefinic products can be polymerized to synthetic lubricating oils or utilized by the Oxo process to make alcohols, or the paraflinic materials can be OXIDIZED to produce FATS and detergents. The fuels can have a wide RANGE of octane or cetane numbers.

Discussion

24.	Fill in the blank: Carbon monoxide is an active _____ for nickel catalysts.(a) Promoter(b) Reactant(c) Poison(d) All of the mentionedI have been asked this question during an internship interview.I'm obligated to ask this question of Industrial Processes-I topic in portion Hydrogenation of Unit Processes
Answer» RIGHT answer is (c) Poison The EXPLANATION is: Carbon monoxide is an active poison for nickel CATALYSTS USED in hydrogenation and for this reason MUST be removed.

Discussion

25.	Carbon monoxide may be hydrogenated to produce what?(a) Hydrocarbon(b) Alcohols(c) Both hydrocarbon and alcohols(d) None of the mentionedThe question was posed to me in a job interview.This interesting question is from Industrial Processes-I in section Hydrogenation of Unit Processes
Answer» Right option is (c) Both hydrocarbon and ALCOHOLS The BEST I can EXPLAIN: Carbon monoxide may be hydrogenated to produce either alcohols or hydrocarbons, DEPENDING on the CATALYSTS used and the reaction conditions. Temperatures ranging from 100–400°C and pressures as high as 1,000 atm.

Discussion

26.	What should be the operating temperature to produce higher alcohol?(a) Higher(b) Lower(c) Moderate(d) None of the mentionedI got this question by my college professor while I was bunking the class.This intriguing question comes from Industrial Processes-I topic in portion Hydrogenation of Unit Processes
Answer» Correct OPTION is (a) HIGHER The EXPLANATION: Higher alcohols are PRODUCED when operating temperatures are slightly higher (350-475°C) than those used in the METHANOL synthesis and with methanol catalysts containing alkalies or else iron-base catalysts containing alkalies.

Discussion

27.	What happens to equilibrium constant in methanol synthesis as temperature decreases?(a) Increases(b) Remains same(c) Decreases(d) None of the mentionedThis question was addressed to me during an interview.This key question is from Industrial Processes-I in division Hydrogenation of Unit Processes
Answer» RIGHT choice is (a) Increases For EXPLANATION: During methanol synthesis, the equilibrium CONSTANT is small and that it decreases rapidly with TEMPERATURE.

Discussion

28.	The synthesis of methanol from carbon monoxide and hydrogen is what type of reaction?(a) Irreversible(b) Reversible(c) Both of the mentioned(d) None of the mentionedI had been asked this question in an international level competition.Enquiry is from Industrial Processes-I topic in chapter Hydrogenation of Unit Processes
Answer» The correct ANSWER is (b) Reversible Explanation: The Methanol Synthesis: The synthesis of methanol from CARBON monoxide and hydrogen is a reversible REACTION.

Discussion

29.	Nickel is by far the most commonly used catalyst in oil hardening.(a) True(b) FalseI have been asked this question in examination.This intriguing question comes from Industrial Processes-I topic in portion Hydrogenation of Unit Processes
Answer» The CORRECT option is (a) True The best I can explain: Nickel is by far the most commonly used catalyst in oil hardening. The catalyst PROBLEM consists of three phases: (1) preparation of a suitable catalyst, (2) maintenance of its activity as LONG as possible, and (3) RECOVERY and reactivation of the spent catalyst.

Discussion

30.	The degree of hydrogenation is determined by what?(a) Melting point(b) Iodine-absorption number(c) Refractive index(d) All of the mentionedThis question was posed to me at a job interview.The question is from Industrial Processes-I topic in chapter Hydrogenation of Unit Processes
Answer» The correct choice is (d) All of the mentioned Easy explanation: The DEGREE of hydrogenation is READILY determined for any GIVEN oil by the MELTING POINT, iodine-absorption number, or refractive index.

Discussion

31.	When the oils are partially hydrogenated, we get solid as result.(a) True(b) FalseThis question was addressed to me in a national level competition.I want to ask this question from Industrial Processes-I topic in section Hydrogenation of Unit Processes
Answer» Correct option is (b) False Easy explanation: When these oils are completely HYDROGENATED, solids result; when the oils are partially hydrogenated. Fats of various consistencies or melting POINTS are obtained.

Discussion

32.	When the oils are completely hydrogenated what do we get?(a) Solid(b) Liquid(c) Vapour(d) All of the mentionedI got this question in examination.This interesting question is from Industrial Processes-I in portion Hydrogenation of Unit Processes
Answer» Correct option is (a) Solid The best EXPLANATION: When these oils are COMPLETELY HYDROGENATED we GET SOLIDS as result.

Discussion

33.	During processing of edible oils what should be the temperature range?(a) High(b) Low(c) Moderate(d) None of the mentionedThis question was posed to me in a job interview.This interesting question is from Industrial Processes-I in section Hydrogenation of Unit Processes
Answer» The CORRECT option is (B) Low The explanation: The PROCESSING of edible oils is usually carried out with considerable care and at lower temperatures in order to minimize UNDESIRABLE side reactions.

Discussion

34.	Which process is hardening of vegetable or marine oils?(a) Dehydrogenation(b) Oxidation(c) Hydrogenation(d) None of the mentionedI have been asked this question in final exam.This interesting question is from Industrial Processes-I in section Hydrogenation of Unit Processes
Answer» Correct choice is (c) Hydrogenation Easy EXPLANATION: The hydrogenation or hardening of vegetable or MARINE OILS is an INDUSTRIAL applications of hydrogenation process.

Discussion

35.	What is the purposes of the hydrogenation of vegetable?(a) Produce hard fats(b) Removing impurities(c) Greater consistency(d) All of the mentionedI got this question during a job interview.The origin of the question is Industrial Processes-I in division Hydrogenation of Unit Processes
Answer» The correct option is (d) All of the mentioned Explanation: The purposes of the hydrogenation of VEGETABLE and animal oils are (1) to PRODUCE a hard fat or ONE of greater consistency than the original liquid oil and (2) to remove certain impurities that are not removable by any other means, THUS rendering the oil useful for purposes for which it could not otherwise be adapted.

Discussion

36.	Which type of unit is high pressure autoclave?(a) Large(b) Small(c) Moderate(d) None of the mentionedI got this question during a job interview.I'd like to ask this question from Hydrogenation in section Hydrogenation of Unit Processes
Answer» Right answer is (b) Small Explanation: A HIGH PRESSURE AUTOCLAVE is a small-scale continuous unit.

Discussion

37.	Valves are an important part of any high-pressure operation.(a) True(b) FalseThe question was posed to me during an interview for a job.I would like to ask this question from Hydrogenation in section Hydrogenation of Unit Processes
Answer» Correct answer is (a) True The explanation is: Valves are an important part of any high-pressure operation, and in coal HYDROGENATION they have to withstand HYDROGEN embrittlement, corrosion, CREEP at high temperatures, and EROSION from solid-liquid mixtures at temperatures of 1000°F and pressures of 10,000 PSIG.

Discussion

38.	Which of the following are vessels used as reactors for commercial operations?(a) Tape-wound(b) Forgings(c) Valves and closure(d) All of the mentionedThe question was asked during an online exam.My question is from Hydrogenation in section Hydrogenation of Unit Processes
Answer» RIGHT choice is (d) All of the mentioned Easy EXPLANATION: Different TYPES of forgings and tape-wound vessels for use as reactors for commercial operations, along with heat exchangers, types of closures, valves, and INSTRUMENTATION are DESCRIBED in the literature.

Discussion

39.	Which type of reaction is hydrogenation?(a) Exothermic(b) Endothermic(c) Neutral(d) None of the mentionedThe question was posed to me in an online quiz.This interesting question is from Hydrogenation topic in division Hydrogenation of Unit Processes
Answer»

Discussion

40.	With the use of which pump water can be pumped into the hydrogen-control tank?(a) One unit proportionating pump(b) Two-unit proportioning pump(c) Three-unit proportioning pump(d) None of the mentionedI had been asked this question during a job interview.I want to ask this question from Hydrogenation topic in portion Hydrogenation of Unit Processes
Answer» Correct option is (B) Two-unit proportioning pump Best EXPLANATION: With the use of a two-unit proportioning pump, WATER can be pumped into the hydrogen-control TANK to bring it BACK to pressure and thus make up for the hydrogen consumed in the reaction.

Discussion

41.	The time of contact with the catalyst in autoclaves depend on?(a) Temperature(b) Reactants(c) Rate of pumping(d) All of the mentionedThe question was posed to me in an online quiz.The origin of the question is Hydrogenation topic in section Hydrogenation of Unit Processes
Answer» The correct choice is (c) RATE of pumping Easiest explanation: In AUTOCLAVES, the TIME of contact with the CATALYST being dependent on the rate of pumping.

Discussion

42.	What is higher-alcohol catalysts consists of?(a) Sodium(b) Calcium(c) Barium carbonates(d) All of the mentionedThis question was posed to me during an interview.My doubt is from Hydrogenation in section Hydrogenation of Unit Processes
Answer» Correct choice is (d) All of the mentioned The best EXPLANATION: Higher-alcohol catalysts are usually of the mild hydrogenating type but contain some more alkaline materials, such as sodium, calcium, or BARIUM CARBONATES or aluminium or magnesium oxides.

Discussion

43.	What happens when the apparatus is smaller?(a) Fewer side reactions(b) Equilibrium defined(c) More velocity(d) All of the mentionedI got this question during an internship interview.The origin of the question is Hydrogenation in portion Hydrogenation of Unit Processes
Answer» The correct option is (d) All of the mentioned Explanation: In hydrogenation we GET higher pressures, where the apparatus is smaller, under such CONDITIONS, the REACTION velocity is increased; the equilibrium POSITIONS are made more favourable; the reaction path is better defined, with fewer side reactions; and heating and COOLING and heat interchange are facilitated.

Discussion

44.	Vanadium oxide is a sulphur-resistant catalyst for hydrogenating.(a) True(b) FalseI got this question in exam.The origin of the question is Hydrogenation topic in chapter Hydrogenation of Unit Processes
Answer» RIGHT ANSWER is (a) True Explanation: Vanadium oxide, which is widely used as an oxidation CATALYST, is reported to be a sulphur-resistant catalyst for hydrogenating UNSATURATED hydrocarbons, but temperatures in the RANGE of 400°C are required.

Discussion

45.	Which of the following is mild hydrogenation catalyst?(a) Nickel(b) Iron(c) Zinc oxide(d) All of the mentionedI have been asked this question by my school teacher while I was bunking the class.I would like to ask this question from Hydrogenation in chapter Hydrogenation of Unit Processes
Answer» Right option is (c) Zinc oxide To EXPLAIN: The large number of catalysts developed for the direct SYNTHESIS of methanol from WATER gas belong to this, class, and they usually CONTAIN copper, zinc oxide, chromium oxide, and manganese oxide and may include some of the RARER elements as promoters.

Discussion

46.	Which of the following is a Nobel-metal catalyst?(a) Zinc oxide(b) Platinum(c) Chromium(d) All of the mentionedI have been asked this question during an online exam.Origin of the question is Hydrogenation in section Hydrogenation of Unit Processes
Answer» Right option is (b) PLATINUM The best I can EXPLAIN: In addition, the noble-metal catalysts such as platinum or palladium or their oxides belong to mild HYDROGENATION catalyst class.

Discussion

47.	Which of the following is a vigorous catalyst?(a) Nickel(b) Cobalt(c) Molybdenum(d) All of the mentionedThe question was asked by my school teacher while I was bunking the class.This is a very interesting question from Hydrogenation topic in chapter Hydrogenation of Unit Processes
Answer» The correct answer is (d) All of the mentioned To EXPLAIN I would say: Common catalysts belonging to this class usually CONSIST of the NICKEL, cobalt, or iron type, as WELL as molybdenum and tungsten OXIDES or sulphides.

Discussion

48.	Cracking tendencies are associated with which type of hydrogenation catalysts?(a) Vigorous(b) Mild(c) Slow(d) All of the mentionedThe question was asked in an online quiz.My question is taken from Hydrogenation in section Hydrogenation of Unit Processes
Answer» Correct answer is (a) VIGOROUS The BEST explanation: Cracking tendencies are USUALLY associated with these vigorous hydrogenation catalysts, although through control of the variables of TEMPERATURE and pressure, the cracking reactions can usually be suppressed.

Discussion

49.	Which catalyst carry hydrogenation to the maximum?(a) Mild Catalyst(b) Vigorous catalyst(c) Both mild and vigorous catalyst(d) None of the mentionedI have been asked this question in a job interview.This question is from Hydrogenation topic in section Hydrogenation of Unit Processes
Answer» Right choice is (b) VIGOROUS catalyst Explanation: Vigorous Hydrogenation Catalysts, these catalysts are usually CHARACTERIZED by the fact that they CARRY the hydrogenation to the GREATEST extent possible, so that the maximum addition of hydrogen to compound occurs under the particular operating CONDITIONS.

Discussion

50.	Hydrogenation involve the saturation of which type of linkage?(a) Carbon-carbon(b) Carboxyl group(c) Hydroxyl group(d) All of the mentionedThis question was addressed to me by my college professor while I was bunking the class.My enquiry is from Hydrogenation in chapter Hydrogenation of Unit Processes
Answer» Right option is (d) All of the mentioned Easiest explanation: Hydrogenation MAY involve the saturation of a carbon-to-carbon LINKAGE or the reduction of carbonyl or carboxyl or hydroxyl groups and may EVEN involve the BREAKING of carbon-to-carbon linkages, as in the hydrogenation of COALS and mineral oils.

Discussion

Explore topic-wise InterviewSolutions in .

What is the temperature range of middle oil?(a) 50-80°C(b) 100-150°C(c) 140-180°C(d) 200-400°CI had been asked this question in an international level competition.The question is from Industrial Processes-III in section Hydrogenation of Unit Processes

What is/are the raw materials for liquefaction process?(a) Lignite(b) Bituminous(c) Anthracite(d) All of the mentionedThe question was asked by my school teacher while I was bunking the class.My question is taken from Industrial Processes-III in division Hydrogenation of Unit Processes

What is meant by pasting oil?(a) High melting point(b) Low boiling point(c) High boiling point(d) None of the mentionedThis question was posed to me in an online interview.This interesting question is from Industrial Processes-III in division Hydrogenation of Unit Processes

Coal is a complex mixture of very _____ molecular-weight compounds.(a) Low(b) High(c) Moderate(d) None of the mentionedI got this question by my school teacher while I was bunking the class.This interesting question is from Industrial Processes-III in section Hydrogenation of Unit Processes

Which type of reaction is hydrogenation of gas oils?(a) Endothermic(b) Exothermic(c) Neutral(d) None of the mentionedThe question was asked in class test.The question is from Industrial Processes-III in chapter Hydrogenation of Unit Processes

Which one of the following is an effective catalysts for converting gas oil?(a) Molybdenum(b) Aluminum(c) Nickel(d) All of the mentionedI have been asked this question during an interview.My question is taken from Industrial Processes-III in chapter Hydrogenation of Unit Processes

Catalysts for the vapour-phase converts ______ to hydrocarbons?(a) Sulphur(b) Oxygen(c) Nitrogen(d) All of the mentionedThe question was posed to me in a national level competition.The above asked question is from Industrial Processes-III in portion Hydrogenation of Unit Processes

Hydrogenation of coal is not a sensitive reaction.(a) True(b) FalseI had been asked this question by my school principal while I was bunking the class.I want to ask this question from Industrial Processes-III in portion Hydrogenation of Unit Processes

The processing of tar is much easier than that of coal.(a) True(b) FalseThe question was posed to me in homework.My doubt stems from Industrial Processes-II topic in section Hydrogenation of Unit Processes

What does manufactured-gas and coke-oven industries produce?(a) Oils(b) Ashes(c) Tars(d) All of the mentionedI had been asked this question during an interview.This intriguing question comes from Industrial Processes-II in division Hydrogenation of Unit Processes

What is/are the use(s) of extra hydrogen?(a) Hydrotreating(b) As fuel(c) For manufacturing(d) All of the mentionedThis question was posed to me during a job interview.My doubt stems from Industrial Processes-II in division Hydrogenation of Unit Processes

Hydrogenation of petroleum oils is/are classified in what?(a) Destructive(b) Non-destructive(c) Both destructive and non-destructive(d) None of the mentionedThe question was asked in an interview for internship.My query is from Industrial Processes-II in portion Hydrogenation of Unit Processes

The operating hydrogenation processes is divided into 3 parts.(a) True(b) FalseThis question was addressed to me in unit test.The above asked question is from Industrial Processes-II topic in portion Hydrogenation of Unit Processes

What is meant by gasoline specifications?(a) Sulphur content(b) Stability(c) Oxidation(d) All of the mentionedThis question was posed to me in class test.I want to ask this question from Industrial Processes-II topic in section Hydrogenation of Unit Processes

The yield of liquid reaction products during hydrogenation depends on what?(a) Solidification(b) Liquefaction(c) Gasification(d) None of the mentionedThis question was addressed to me during an interview.Question is from Industrial Processes-II in section Hydrogenation of Unit Processes

The hydrogen consumed in the process depends on what?(a) Raw materials(b) Products(c) Low-boiling hydrocarbons(d) All of the mentionedI got this question during a job interview.I'd like to ask this question from Industrial Processes-II topic in chapter Hydrogenation of Unit Processes

Which type of reaction is hydrogenation?(a) Exothermic(b) Endothermic(c) Neutral(d) None of the mentionedThis question was addressed to me during an online interview.Question is taken from Industrial Processes-II topic in chapter Hydrogenation of Unit Processes

The oil-hardening processes use which type of compounds?(a) Long-chain acids(b) Esters(c) Saturates(d) All of the mentionedThis question was addressed to me in a national level competition.This is a very interesting question from Industrial Processes-II in section Hydrogenation of Unit Processes

The fuels can have a wide range of octane or cetane numbers.(a) True(b) FalseThe question was asked by my school principal while I was bunking the class.The question is from Industrial Processes-II in portion Hydrogenation of Unit Processes

Carbon monoxide may be hydrogenated to produce what?(a) Hydrocarbon(b) Alcohols(c) Both hydrocarbon and alcohols(d) None of the mentionedThe question was posed to me in a job interview.This interesting question is from Industrial Processes-I in section Hydrogenation of Unit Processes

What happens to equilibrium constant in methanol synthesis as temperature decreases?(a) Increases(b) Remains same(c) Decreases(d) None of the mentionedThis question was addressed to me during an interview.This key question is from Industrial Processes-I in division Hydrogenation of Unit Processes

Nickel is by far the most commonly used catalyst in oil hardening.(a) True(b) FalseI have been asked this question in examination.This intriguing question comes from Industrial Processes-I topic in portion Hydrogenation of Unit Processes

The degree of hydrogenation is determined by what?(a) Melting point(b) Iodine-absorption number(c) Refractive index(d) All of the mentionedThis question was posed to me at a job interview.The question is from Industrial Processes-I topic in chapter Hydrogenation of Unit Processes

When the oils are partially hydrogenated, we get solid as result.(a) True(b) FalseThis question was addressed to me in a national level competition.I want to ask this question from Industrial Processes-I topic in section Hydrogenation of Unit Processes

When the oils are completely hydrogenated what do we get?(a) Solid(b) Liquid(c) Vapour(d) All of the mentionedI got this question in examination.This interesting question is from Industrial Processes-I in portion Hydrogenation of Unit Processes

During processing of edible oils what should be the temperature range?(a) High(b) Low(c) Moderate(d) None of the mentionedThis question was posed to me in a job interview.This interesting question is from Industrial Processes-I in section Hydrogenation of Unit Processes

Which process is hardening of vegetable or marine oils?(a) Dehydrogenation(b) Oxidation(c) Hydrogenation(d) None of the mentionedI have been asked this question in final exam.This interesting question is from Industrial Processes-I in section Hydrogenation of Unit Processes

What is the purposes of the hydrogenation of vegetable?(a) Produce hard fats(b) Removing impurities(c) Greater consistency(d) All of the mentionedI got this question during a job interview.The origin of the question is Industrial Processes-I in division Hydrogenation of Unit Processes

Which type of unit is high pressure autoclave?(a) Large(b) Small(c) Moderate(d) None of the mentionedI got this question during a job interview.I'd like to ask this question from Hydrogenation in section Hydrogenation of Unit Processes

Valves are an important part of any high-pressure operation.(a) True(b) FalseThe question was posed to me during an interview for a job.I would like to ask this question from Hydrogenation in section Hydrogenation of Unit Processes

Which of the following are vessels used as reactors for commercial operations?(a) Tape-wound(b) Forgings(c) Valves and closure(d) All of the mentionedThe question was asked during an online exam.My question is from Hydrogenation in section Hydrogenation of Unit Processes

Which type of reaction is hydrogenation?(a) Exothermic(b) Endothermic(c) Neutral(d) None of the mentionedThe question was posed to me in an online quiz.This interesting question is from Hydrogenation topic in division Hydrogenation of Unit Processes

The time of contact with the catalyst in autoclaves depend on?(a) Temperature(b) Reactants(c) Rate of pumping(d) All of the mentionedThe question was posed to me in an online quiz.The origin of the question is Hydrogenation topic in section Hydrogenation of Unit Processes

What is higher-alcohol catalysts consists of?(a) Sodium(b) Calcium(c) Barium carbonates(d) All of the mentionedThis question was posed to me during an interview.My doubt is from Hydrogenation in section Hydrogenation of Unit Processes

What happens when the apparatus is smaller?(a) Fewer side reactions(b) Equilibrium defined(c) More velocity(d) All of the mentionedI got this question during an internship interview.The origin of the question is Hydrogenation in portion Hydrogenation of Unit Processes

Vanadium oxide is a sulphur-resistant catalyst for hydrogenating.(a) True(b) FalseI got this question in exam.The origin of the question is Hydrogenation topic in chapter Hydrogenation of Unit Processes

Which of the following is mild hydrogenation catalyst?(a) Nickel(b) Iron(c) Zinc oxide(d) All of the mentionedI have been asked this question by my school teacher while I was bunking the class.I would like to ask this question from Hydrogenation in chapter Hydrogenation of Unit Processes

Which of the following is a Nobel-metal catalyst?(a) Zinc oxide(b) Platinum(c) Chromium(d) All of the mentionedI have been asked this question during an online exam.Origin of the question is Hydrogenation in section Hydrogenation of Unit Processes

Which of the following is a vigorous catalyst?(a) Nickel(b) Cobalt(c) Molybdenum(d) All of the mentionedThe question was asked by my school teacher while I was bunking the class.This is a very interesting question from Hydrogenation topic in chapter Hydrogenation of Unit Processes

Cracking tendencies are associated with which type of hydrogenation catalysts?(a) Vigorous(b) Mild(c) Slow(d) All of the mentionedThe question was asked in an online quiz.My question is taken from Hydrogenation in section Hydrogenation of Unit Processes

Which catalyst carry hydrogenation to the maximum?(a) Mild Catalyst(b) Vigorous catalyst(c) Both mild and vigorous catalyst(d) None of the mentionedI have been asked this question in a job interview.This question is from Hydrogenation topic in section Hydrogenation of Unit Processes