75 + Interview Questions in Esterification in Unit Processes Page 1 InterviewSolution

1.	Terpene esters can be made by the direct addition of fatty acids only.(a) True(b) FalseThe question was posed to me during an interview.Origin of the question is Manufacturings in division Esterification of Unit Processes
Answer» The correct choice is (b) False Easy explanation: Terpene esters can be made by the DIRECT addition of fatty acids and halogenated and thiocyanated fatty acids to terpene HYDROCARBONS, ETHERS, and esters.

Discussion

2.	Cellulose occurs in which type of polymer weight?(a) Low molecular weight(b) Moderate(c) High molecular weight(d) None of the mentionedI got this question by my college professor while I was bunking the class.Question is taken from Manufacturings topic in division Esterification of Unit Processes
Answer» The correct option is (c) HIGH MOLECULAR weight The explanation is: Cellulose occurs in these MATERIALS as a fairly highly crystalline, high-molecular-weight polymer. It is in a FIBROUS form, which is insoluble in common REAGENTS.

Discussion

3.	Cellulose acetate is used in manufacturing of what?(a) Cellulose acetate yarn(b) Plastics(c) Photographic films(d) All of the mentionedThis question was posed to me during an internship interview.Asked question is from Manufacturings topic in section Esterification of Unit Processes
Answer» RIGHT answer is (d) All of the mentioned To explain: Cellulose acetate is an important commercial polymer used in the MANUFACTURE of cellulose acetate YARN, plastics, photographic films and sheeting, and surface coatings.

Discussion

4.	The bicyclic terpenes are more reactive than what?(a) Monocyclic terpenes(b) Tricyclic terpenes(c) Both mono and tricyclic terpenes(d) None of the mentionedThis question was posed to me in an interview for internship.Enquiry is from Manufacturings in portion Esterification of Unit Processes
Answer» Correct option is (a) Monocyclic terpenes The explanation: Since the bicyclic terpenes (camphene, a-pinene, and fl-pinene) are more reactive than the monocyclic, they are the PREFERABLE STARTING materials.

Discussion

5.	Why is agitation in reaction kettle necessary?(a) Immiscible reactants(b) Viscosity(c) Both immiscible reactant and viscosity(d) None of the mentionedThis question was posed to me by my school teacher while I was bunking the class.My question is from Manufacturings in chapter Esterification of Unit Processes
Answer» RIGHT CHOICE is (c) Both immiscible reactant and viscosity Easy explanation: Thorough AGITATION in the reaction kettle is a necessity because of the IMMISCIBILITY of the ingredients and the viscosity of the MIXTURES.

Discussion

6.	What happens to the rate of heating as kettle size increases?(a) Increases(b) Decreases(c) No change(d) None of the mentionedThis question was posed to me during an online exam.I would like to ask this question from Manufacturings in portion Esterification of Unit Processes
Answer» Right ANSWER is (b) Decreases Explanation: As the kettle size is increased, the RATE of HEATING up the contents of the kettle is lowered, because of the diminishing RATIO of heating surface to the WEIGHT of the charge in the kettle.

Discussion

7.	Which type of catalyst are used in manufacture of Alkyd Resins?(a) Lead(b) Zinc chloride(c) Triphenyl phosphite(d) All of the mentionedThe question was posed to me in quiz.The above asked question is from Manufacturings topic in chapter Esterification of Unit Processes
Answer» Correct ANSWER is (d) All of the mentioned Easiest explanation: A wide VARIETY of catalysts, such as lead, calcium, zinc, phosphoric acid, zinc CHLORIDE, triphenyl phosphite, and ptoluenesulfonic acid, have been used for the MANUFACTURING of alkyl resins.

Discussion

8.	How is diffusion in mixtures which are viscous at start?(a) Fast(b) Mild(c) Slow(d) None of the mentionedThis question was posed to me in my homework.I would like to ask this question from Manufacturings topic in portion Esterification of Unit Processes
Answer» Correct choice is (c) SLOW To explain: Diffusion is slow in these mixtures which are fairly viscous at the start and BECOME much more so TOWARD the end.

Discussion

9.	The Dibasic acids are usually the crude acid mixtures.(a) True(b) FalseThis question was posed to me during an interview for a job.My doubt stems from Manufacturings topic in section Esterification of Unit Processes
Answer» Correct option is (b) False Easiest EXPLANATION: The monobasic ACIDS are USUALLY the crude acid mixtures that are obtained by SAPONIFYING natural oils, such as linseed, soybean, castor, or cottonseed oils.

Discussion

10.	Alkyd resins are polymeric esters are heated with what?(a) Basic acid(b) Dibasic acid(c) Tribasic acid(d) All of the mentionedThis question was addressed to me at a job interview.The origin of the question is Manufacturings topic in section Esterification of Unit Processes
Answer» The correct choice is (b) DIBASIC acid Best explanation: Alkyd resins are polymeric ESTERS which are obtained when polyhydric ALCOHOLS are heated with dibasic ACIDS.

Discussion

11.	Polyethylene terephthalate is prepared by a transesterification reaction.(a) True(b) FalseThis question was posed to me in a job interview.My question is taken from Esterification Practice topic in division Esterification of Unit Processes
Answer»

Discussion

12.	Dimethyl terephthalate is obtained by esterification of what?(a) Benzene(b) Ethanol(c) Terephthalic acid(d) None of the mentionedI have been asked this question during an online exam.This is a very interesting question from Esterification Practice topic in portion Esterification of Unit Processes
Answer» Right answer is (C) Terephthalic acid Easy explanation: Dimethyl TEREPHTHALATE is OBTAINED by the ESTERIFICATION of terephthalic acid by methanol.

Discussion

13.	Polyethylene terephthalate is used in the manufacture of Dacron polyester fibre.(a) True(b) FalseI had been asked this question in an interview.The question is from Esterification Practice in division Esterification of Unit Processes
Answer» The correct answer is (a) True The best explanation: Polyethylene TEREPHTHALATE is used in the manufacture of DACRON POLYESTER FIBRE, MYLAR polyester film, and Cronar photographic film base.

Discussion

14.	The presence of considerable amount of water affects what?(a) Apparatus(b) Temperature(c) Both apparatus and temperature(d) None of the mentionedThe question was asked in an interview for job.The query is from Esterification Practice in chapter Esterification of Unit Processes
Answer» Correct CHOICE is (a) Apparatus The best explanation: The presence of any considerable AMOUNT of water decreases the capacity of the apparatus and LENGTHENS the distillation time.

Discussion

15.	Which process is used for manufacturing ethyl acetate?(a) Batch process(b) Continuous process(c) Semi batch process(d) All of the mentionedI had been asked this question in quiz.This intriguing question comes from Esterification Practice topic in section Esterification of Unit Processes
Answer» Correct option is (d) All of the mentioned The explanation is: All of these PROCESS can be USED for the MANUFACTURING ethyl acetate.

Discussion

16.	What does refining of the ester include?(a) Neutralising(b) Water washing(c) Agitation(d) All of the mentionedThis question was posed to me by my school principal while I was bunking the class.This key question is from Esterification Practice topic in section Esterification of Unit Processes
Answer» Right answer is (d) All of the mentioned For explanation I would SAY: The REFINING of the ester DISTILLATE comprises neutralizing with SODIUM carbonate or lime under agitation, followed by a water WASHING, which removes the excess of alcohol.

Discussion

17.	As temperatures and concentrations of corrodents are increased, which type of stainless steels is/are used?(a) Ferritic chromium alloys(b) Chromium-nickel alloys(c) Both the alloys(d) None of the mentionedThis question was posed to me in homework.The query is from Esterification Practice in chapter Esterification of Unit Processes
Answer» Correct choice is (c) Both the alloys To EXPLAIN I would SAY: As TEMPERATURES and concentrations of corrodents are increased, the choice of stainless steels is narrowed to the FERRITIC chromium alloys and the AUSTENITIC chromium-nickel alloys.

Discussion

18.	Which type of apparatus is used for commercial-scale esterification units?(a) Alloy(b) Stainless steel(c) Hydrogenated steel(d) None of the mentionedI have been asked this question in exam.The doubt is from Esterification Practice in division Esterification of Unit Processes
Answer» The correct CHOICE is (B) Stainless steel Explanation: APPARATUS of special GRADES of stainless steel is generally USED for commercial-scale esterification units.

Discussion

19.	In esterification plant it is necessary to employ which catalyst?(a) Nitric acid(b) Hydrochloric acid(c) Sulphuric acid(d) All of the mentionedThis question was posed to me by my school teacher while I was bunking the class.The query is from Esterification Practice in portion Esterification of Unit Processes
Answer» RIGHT answer is (c) SULPHURIC acid Best explanation: In every case of esterification plant, it is now customary to employ a catalyst, which is usually sulfuric acid, in ADMIXTURE with the ALCOHOL and acid that are to react.

Discussion

20.	The plant for making esters from organic acids and alcohols is divided into how many types?(a) Two(b) Three(c) Four(d) FiveThis question was addressed to me during an online interview.This interesting question is from Esterification Practice topic in section Esterification of Unit Processes
Answer» The correct choice is (b) Three To ELABORATE: A plant for making esters from organic acids and alcohols on a LARGE scale MAY be of three GENERAL types.

Discussion

21.	What is the formula of sulphur analogue of phosphorus oxychloride?(a) PSCl3(b) PSCl5(c) PSCl2(d) PCl2SThe question was asked in an online quiz.My doubt stems from Esters of Inorganic Acids in section Esterification of Unit Processes
Answer» Correct OPTION is (a) PSCl3 To elaborate: If the SULPHUR analogue of phosphorus oxychloride, PSCl3, is caused to REACT with an ALCOHOL, or its sulphur analogue, a mercaptan, the corresponding thioester is OBTAINED.

Discussion

22.	Phosphates are prepared by the reaction of what?(a) Phosphorus pentachloride(b) Phosphorus oxychloride(c) Phosphorus pentachloride & oxychloride(d) None of the mentionedI got this question during an interview for a job.This intriguing question comes from Esters of Inorganic Acids topic in portion Esterification of Unit Processes
Answer» RIGHT answer is (C) PHOSPHORUS pentachloride & oxychloride For explanation: Phosphates are PREPARED by the reaction of phosphorus pentachloride or phosphorus oxychloride with the APPROPRIATE alcohol or phenol.

Discussion

23.	“Care must be taken to achieve uniformity of nitration”.(a) True(b) False.I had been asked this question in an online quiz.The query is from Esters of Inorganic Acids in portion Esterification of Unit Processes
Answer» Right choice is (a) True The explanation is: In CARRYING out the REACTION, care must be TAKEN to ACHIEVE uniformity of nitration, since the value of the product is largely dependent on its APPROACH to homogeneity.

Discussion

24.	What is the use of monosulphates?(a) Drying agent(b) Detergent(c) Catalyst(d) All of the mentionedI have been asked this question in homework.I need to ask this question from Esters of Inorganic Acids in chapter Esterification of Unit Processes
Answer» The correct answer is (B) Detergent Best explanation: The monosulfates, have a WIDE range of USES as detergents and WETTING AGENTS.

Discussion

25.	Complete the following reaction: C2H5OH + HNO3 ——> C2H5ONO2 + H2O.(a) C2H5ONO3(b) C2H5ONH2(c) C2H5ONO2(d) C2H5NO2I had been asked this question in unit test.The doubt is from Esters of Inorganic Acids in chapter Esterification of Unit Processes
Answer» Right ANSWER is (c) C2H5ONO2 Best EXPLANATION: C2H5OH + HNO3 ——> C2H5ONO2.

Discussion

26.	What is done to avoid polymerization of the hydrocarbons?(a) Low temperature(b) High heat(c) Catalyst(d) High temperatureThis question was addressed to me in a national level competition.Origin of the question is Esters of Inorganic Acids in portion Esterification of Unit Processes
Answer» The CORRECT choice is (a) Low TEMPERATURE For explanation: To AVOID polymerization and isomerization of the HYDROCARBONS, the temperature is kept relatively low, usually from 0-40°C.

Discussion

27.	What is a mixed acid?(a) HCl+ HNO3(b) H2SO4+HCl(c) H2SO4+ HNO3(d) All of the mentionedI had been asked this question in an interview for internship.My doubt is from Esters of Inorganic Acids in division Esterification of Unit Processes
Answer» The CORRECT option is (c) H2SO4+ HNO3 The EXPLANATION: A mixed acid, which is a mixture of nitric and sulfuric ACIDS and may contain water or sulphur trioxide, the concentrations of these being accurately ADJUSTED to give the desired degree of nitration.

Discussion

28.	The nitration is carried out in only homogeneous phase.(a) True(b) FalseThis question was addressed to me during an interview.I would like to ask this question from Esters of Inorganic Acids topic in chapter Esterification of Unit Processes
Answer» Right option is (B) False For explanation I would say: The NITRATION may be carried out in either a homogeneous or a heterogeneous REACTION system.

Discussion

29.	Ketene on reaction with what produce ester?(a) Alcohol(b) Aldehyde(c) Carboxylic acid(d) KetoneThe question was asked by my school teacher while I was bunking the class.My question is taken from Esterification of Carboxylic Acid and Derivatives topic in division Esterification of Unit Processes
Answer» Correct choice is (a) Alcohol Best explanation: The REACTION of KETENE with ALCOHOLS to produce ESTERS is attractive, since all the ketene goes into the PRODUCT and there are no by-products.

Discussion

30.	Which of the following is an ester of inorganic acid?(a) Sulfuric acid(b) Phosphoric acid(c) Silicic acid(d) All of the mentionedI had been asked this question in semester exam.Enquiry is from Esters of Inorganic Acids topic in portion Esterification of Unit Processes
Answer» CORRECT answer is (d) All of the mentioned To explain I would say: The commercially important ESTERS of inorganic acids are those of nitric, sulfuric, phosphoric, and SILICIC acids. The nitrates of glycerol and cellulose are among the oldest of synthetic chemical PRODUCTS. They are prepared by the direct esterification of the alcohol by nitric ACID.

Discussion

31.	How is sodium or potassium xanthate purified?(a) Distillation(b) Recrystallization(c) Evaporation(d) All of the mentionedI had been asked this question by my school teacher while I was bunking the class.This intriguing question originated from Esterification of Carboxylic Acid and Derivatives topic in division Esterification of Unit Processes
Answer» Right option is (B) Recrystallization To EXPLAIN: The sodium or POTASSIUM XANTHATE MAY be purified by recrystallization.

Discussion

32.	What is/are the optimum condition for the esterification of olefins by carboxylic acids?(a) Low reaction temperature(b) High concentrations of reactants(c) Large quantities of catalyst(d) All of the mentionedI got this question in class test.This key question is from Esterification of Carboxylic Acid and Derivatives topic in chapter Esterification of Unit Processes
Answer» RIGHT option is (d) All of the mentioned Easy explanation: The optimum conditions for the esterification of olefins by carboxylic acids require low reaction temperatures, HIGH concentrations of REACTANTS, relatively large quantities of catalyst, and ANHYDROUS conditions.

Discussion

33.	The addition of carboxylic acids to isobutylene and trimethylethylene gives what type of esters?(a) Primary(b) Secondary(c) Tertiary(d) None of the mentionedI got this question during an online exam.This interesting question is from Esterification of Carboxylic Acid and Derivatives in portion Esterification of Unit Processes
Answer» Right answer is (c) Tertiary The explanation is: The addition of carboxylic ACIDS to the DOUBLE bonds of isobutylene and trimethylethylene GIVES tertiary ESTERS.

Discussion

34.	The addition of an organic acid to an unsaturated hydrocarbon occurs in presence of what?(a) Mild base catalyst(b) Strong base catalyst(c) Mild acid catalyst(d) Strong-acid catalystI have been asked this question in final exam.My question is based upon Esterification of Carboxylic Acid and Derivatives topic in portion Esterification of Unit Processes
Answer» Correct CHOICE is (d) Strong-acid catalyst For explanation I would say: The addition of an organic acid to an unsaturated HYDROCARBON in the presence of a strong-acid catalyst probably OCCURS through an intermediate CARBONIUM ion.

Discussion

35.	The nitriles of hydroxy acids are obtained by addition of CN to what?(a) Alcohol(b) Aldehyde(c) Carboxylic acid(d) KetonesI had been asked this question in final exam.My question is based upon Esterification of Carboxylic Acid and Derivatives topic in division Esterification of Unit Processes
Answer» Correct CHOICE is (b) Aldehyde The BEST explanation: The nitriles of HYDROXY acids, are readily obtained by the addition of hydrocyanic acid to an aldehyde. The hydroxy nitrile is readily dehydrated to acrylonitrile, from which ACRYLIC ESTERS generally are manufactured by alcoholysis.

Discussion

36.	Complete the following reaction: CH3CN + H2O + C2H5OH —–> _______ + NH3.(a) CH3COC2H5(b) CH3COOCH3(c) CH3COOC2H5(d) CH3COOHI have been asked this question during an interview for a job.Question is taken from Esterification of Carboxylic Acid and Derivatives in chapter Esterification of Unit Processes
Answer» Correct answer is (C) CH3COOC2H5 Explanation: If the ester of an acid corresponding to an AVAILABLE nitrile is DESIRED, it may be prepared by SAPONIFYING the nitrile and then esterifying the acid in the usual way.CH3CN + H2O + C2H5OH —–> CH3COOC2H5 + NH3.

Discussion

37.	What is formed when metal salt of an acid is heated with an alkyl halide?(a) Alcohol(b) Alkyl ester(c) Aromatic(d) None of the mentionedThis question was posed to me by my college director while I was bunking the class.My question is from Esterification of Carboxylic Acid and Derivatives in portion Esterification of Unit Processes
Answer» Correct answer is (B) Alkyl ester To elaborate: When the METAL SALT of an acid is heated with an alkyl HALIDE, the corresponding alkyl ester is formed.

Discussion

38.	The ester of an aliphatic acid is heated with what to produce acid?(a) Lithium(b) Calcium(c) Zinc(d) All of the mentionedThis question was posed to me in an interview for internship.My question comes from Esterification of Carboxylic Acid and Derivatives topic in chapter Esterification of Unit Processes
Answer» Correct option is (d) All of the mentioned The explanation: When triethyl PHOSPHATE or an ester of an aliphatic acid is heated with LITHIUM, calcium, zinc, or ferric chloride, an ALKYL HALIDE and a salt of the acid are OBTAINED.

Discussion

39.	What is produced on mixing sodium acetate and benzyl chloride?(a) Benzyl acetate(b) Sodium benzyl(c) All of the mentioned(d) None of the mentionedI have been asked this question during an interview.My doubt stems from Esterification of Carboxylic Acid and Derivatives topic in section Esterification of Unit Processes
Answer» Right choice is (a) BENZYL acetate Explanation: The MANUFACTURE of benzyl acetate from sodium acetate and benzyl CHLORIDE. SINCE benzyl chloride is made by chlorinating toluene, it is the most readily available benzyl COMPOUND.

Discussion

40.	What do we get on mixing NH3 with ester?(a) Amide(b) Alcohol(c) Acid amide(d) None of the mentionedI had been asked this question during an interview.I need to ask this question from Esterification of Carboxylic Aacid and Derivatives in portion Esterification of Unit Processes
Answer» RIGHT choice is (c) Acid amide Easiest explanation: An EXCELLENT WAY to MAKE an acid amide is to treat an ester with AMMONIA.

Discussion

41.	What is the disadvantage of Acid chloride?(a) Evolution of HCl(b) Corrosive(c) Evolution of HCl and Corrosive(d) None of the mentionedThis question was posed to me in final exam.My question is based upon Esterification of Carboxylic Aacid and Derivatives topic in division Esterification of Unit Processes
Answer» The CORRECT ANSWER is (c) Evolution of HCl and Corrosive The best I can explain: The disadvantages of acid chloride are that the hydrogen chloride evolution can CAUSE changes in the organic compounds or serious CORROSION of metal equipment.

Discussion

42.	Which is the commonly used catalysts for alcoholysis?(a) Aluminium oxide(b) Sodium alkoxides(c) Iron oxide(d) All of the mentionedI had been asked this question in an interview.My query is from Esterification of Carboxylic Aacid and Derivatives in section Esterification of Unit Processes
Answer» Correct answer is (b) Sodium ALKOXIDES For explanation I would SAY: The most commonly used CATALYSTS for alcoholysis, HOWEVER, are the sodium alkoxides.

Discussion

43.	How is reactions of an alcohol with acetic anhydride are accelerated?(a) Sulfuric acid(b) Zinc chloride(c) Phosphorus pentoxide(d) All of the mentionedI got this question in examination.Origin of the question is Esterification of Carboxylic Aacid and Derivatives in division Esterification of Unit Processes
Answer» The correct answer is (d) All of the mentioned To explain I would SAY: REACTIONS of an alcohol with acetic anhydride are greatly accelerated by acid catalysts, such as sulfuric acid, zinc CHLORIDE, phosphorus PENTOXIDE, ferric chloride, ETC.

Discussion

44.	What is the counterpart of alcoholysis called?(a) Acidolysis(b) Aldehyde(c) Both acidolysis and aldehyde(d) None of the mentionedThis question was addressed to me in an interview for job.Query is from Esterification of Carboxylic Aacid and Derivatives in chapter Esterification of Unit Processes
Answer» Right option is (a) Acidolysis To ELABORATE: The counterpart of ALCOHOLYSIS, acidolysis, in which one ACID displaces ANOTHER from an ester is so similar to alcoholysis that little NEED be said about it.

Discussion

45.	Titanium esters are excellent esterexchange catalysts.(a) True(b) FalseI have been asked this question in quiz.My question is based upon Esterification of Carboxylic Aacid and Derivatives in section Esterification of Unit Processes
Answer» The correct CHOICE is (a) True Explanation: TITANIUM esters are EXCELLENT esterexchange catalysts. They are effective in catalysing interchange between TWO esters as well as between an alcohol and an ester. They usually do not catalyse side reactions, and they are ESPECIALLY useful with polymerizable materials such as methacrylates which are attacked or polymerized by standard ester-exchange catalysts.

Discussion

46.	Which of the following acts as a catalyst in alcoholysis reaction?(a) Ammonia(b) Pyridine(c) Sodium hydroxide(d) All of the mentionedI got this question by my college director while I was bunking the class.Origin of the question is Esterification of Carboxylic Aacid and Derivatives in division Esterification of Unit Processes
Answer» The correct choice is (d) All of the mentioned The BEST EXPLANATION: Besides the sodium alkoxides, various other catalysts for this reaction have been RECOMMENDED: ammonia, pyridine, tetramethylammonium hydroxide, aluminium alkoxides,l lithium methoxide, sodium hydroxide, and sodium carbonate.

Discussion

47.	How to increase the rate in alcoholysis?(a) Increase basicity(b) Attack on positive carbonyl carbon(c) Catalyst(d) All of the mentionedI had been asked this question during an internship interview.Query is from Esterification of Carboxylic Aacid and Derivatives topic in division Esterification of Unit Processes
Answer» Correct answer is (d) All of the mentioned Explanation: For the increase in rate is that the basicity of the alcohol OXYGEN is INCREASED and that this increase in basicity FACILITATES ATTACK on the positive carbonyl carbon.

Discussion

48.	Ternary azeotrope can be easily separated by distillation.(a) True(b) FalseI got this question in an online quiz.This intriguing question originated from Completing Esterification topic in portion Esterification of Unit Processes
Answer» The correct OPTION is (b) False The best explanation: The ternary azeotrope boils lower than any of the individual constituents of the system or EITHER of the binary azeotropes and is the distillate from an efficient COLUMN as long as all three of the constituents are present in the still. Because this ternary azeotrope cannot be separated by distillation.

Discussion

49.	A mixture of amyl nitrite and ethyl alcohol produces what?(a) Nitrile(b) Nitrosamine(c) Nitro ethyl alcohol(d) Ethyl nitriteThe question was posed to me in semester exam.Origin of the question is Esterification of Carboxylic Aacid and Derivatives topic in portion Esterification of Unit Processes
Answer» CORRECT OPTION is (d) Ethyl nitrite The BEST I can explain: If a mixture of amyl nitrite and ethyl alcohol containing an ACID catalyst is WARMED, ethyl nitrite distils out.

Discussion

50.	Complete the following reaction: CH3COOC2H5 + HOCH3 ——> _______ + HOC2H5.(a) CH3COCH3(b) CH3COCH2CH3(c) CH3COOCH3(d) CH3COOCH2The question was asked in my homework.My query is from Esterification of Carboxylic Aacid and Derivatives topic in chapter Esterification of Unit Processes
Answer» Correct option is (C) CH3COOCH3 Easiest explanation: The FOLLOWING REACTION is ester-interchange reaction, CH3COOC2H5 + HOCH3 ——> CH3COOCH3 + HOC2H5.

Discussion

Explore topic-wise InterviewSolutions in .

Terpene esters can be made by the direct addition of fatty acids only.(a) True(b) FalseThe question was posed to me during an interview.Origin of the question is Manufacturings in division Esterification of Unit Processes

Cellulose occurs in which type of polymer weight?(a) Low molecular weight(b) Moderate(c) High molecular weight(d) None of the mentionedI got this question by my college professor while I was bunking the class.Question is taken from Manufacturings topic in division Esterification of Unit Processes

Cellulose acetate is used in manufacturing of what?(a) Cellulose acetate yarn(b) Plastics(c) Photographic films(d) All of the mentionedThis question was posed to me during an internship interview.Asked question is from Manufacturings topic in section Esterification of Unit Processes

The bicyclic terpenes are more reactive than what?(a) Monocyclic terpenes(b) Tricyclic terpenes(c) Both mono and tricyclic terpenes(d) None of the mentionedThis question was posed to me in an interview for internship.Enquiry is from Manufacturings in portion Esterification of Unit Processes

What happens to the rate of heating as kettle size increases?(a) Increases(b) Decreases(c) No change(d) None of the mentionedThis question was posed to me during an online exam.I would like to ask this question from Manufacturings in portion Esterification of Unit Processes

Which type of catalyst are used in manufacture of Alkyd Resins?(a) Lead(b) Zinc chloride(c) Triphenyl phosphite(d) All of the mentionedThe question was posed to me in quiz.The above asked question is from Manufacturings topic in chapter Esterification of Unit Processes

How is diffusion in mixtures which are viscous at start?(a) Fast(b) Mild(c) Slow(d) None of the mentionedThis question was posed to me in my homework.I would like to ask this question from Manufacturings topic in portion Esterification of Unit Processes

The Dibasic acids are usually the crude acid mixtures.(a) True(b) FalseThis question was posed to me during an interview for a job.My doubt stems from Manufacturings topic in section Esterification of Unit Processes

Alkyd resins are polymeric esters are heated with what?(a) Basic acid(b) Dibasic acid(c) Tribasic acid(d) All of the mentionedThis question was addressed to me at a job interview.The origin of the question is Manufacturings topic in section Esterification of Unit Processes

Polyethylene terephthalate is prepared by a transesterification reaction.(a) True(b) FalseThis question was posed to me in a job interview.My question is taken from Esterification Practice topic in division Esterification of Unit Processes

Dimethyl terephthalate is obtained by esterification of what?(a) Benzene(b) Ethanol(c) Terephthalic acid(d) None of the mentionedI have been asked this question during an online exam.This is a very interesting question from Esterification Practice topic in portion Esterification of Unit Processes

Polyethylene terephthalate is used in the manufacture of Dacron polyester fibre.(a) True(b) FalseI had been asked this question in an interview.The question is from Esterification Practice in division Esterification of Unit Processes

The presence of considerable amount of water affects what?(a) Apparatus(b) Temperature(c) Both apparatus and temperature(d) None of the mentionedThe question was asked in an interview for job.The query is from Esterification Practice in chapter Esterification of Unit Processes

Which process is used for manufacturing ethyl acetate?(a) Batch process(b) Continuous process(c) Semi batch process(d) All of the mentionedI had been asked this question in quiz.This intriguing question comes from Esterification Practice topic in section Esterification of Unit Processes

What does refining of the ester include?(a) Neutralising(b) Water washing(c) Agitation(d) All of the mentionedThis question was posed to me by my school principal while I was bunking the class.This key question is from Esterification Practice topic in section Esterification of Unit Processes

Which type of apparatus is used for commercial-scale esterification units?(a) Alloy(b) Stainless steel(c) Hydrogenated steel(d) None of the mentionedI have been asked this question in exam.The doubt is from Esterification Practice in division Esterification of Unit Processes

The plant for making esters from organic acids and alcohols is divided into how many types?(a) Two(b) Three(c) Four(d) FiveThis question was addressed to me during an online interview.This interesting question is from Esterification Practice topic in section Esterification of Unit Processes

What is the formula of sulphur analogue of phosphorus oxychloride?(a) PSCl3(b) PSCl5(c) PSCl2(d) PCl2SThe question was asked in an online quiz.My doubt stems from Esters of Inorganic Acids in section Esterification of Unit Processes

“Care must be taken to achieve uniformity of nitration”.(a) True(b) False.I had been asked this question in an online quiz.The query is from Esters of Inorganic Acids in portion Esterification of Unit Processes

What is the use of monosulphates?(a) Drying agent(b) Detergent(c) Catalyst(d) All of the mentionedI have been asked this question in homework.I need to ask this question from Esters of Inorganic Acids in chapter Esterification of Unit Processes

Complete the following reaction: C2H5OH + HNO3 ——> C2H5ONO2 + H2O.(a) C2H5ONO3(b) C2H5ONH2(c) C2H5ONO2(d) C2H5NO2I had been asked this question in unit test.The doubt is from Esters of Inorganic Acids in chapter Esterification of Unit Processes

What is done to avoid polymerization of the hydrocarbons?(a) Low temperature(b) High heat(c) Catalyst(d) High temperatureThis question was addressed to me in a national level competition.Origin of the question is Esters of Inorganic Acids in portion Esterification of Unit Processes

What is a mixed acid?(a) HCl+ HNO3(b) H2SO4+HCl(c) H2SO4+ HNO3(d) All of the mentionedI had been asked this question in an interview for internship.My doubt is from Esters of Inorganic Acids in division Esterification of Unit Processes

The nitration is carried out in only homogeneous phase.(a) True(b) FalseThis question was addressed to me during an interview.I would like to ask this question from Esters of Inorganic Acids topic in chapter Esterification of Unit Processes

Ketene on reaction with what produce ester?(a) Alcohol(b) Aldehyde(c) Carboxylic acid(d) KetoneThe question was asked by my school teacher while I was bunking the class.My question is taken from Esterification of Carboxylic Acid and Derivatives topic in division Esterification of Unit Processes

Which of the following is an ester of inorganic acid?(a) Sulfuric acid(b) Phosphoric acid(c) Silicic acid(d) All of the mentionedI had been asked this question in semester exam.Enquiry is from Esters of Inorganic Acids topic in portion Esterification of Unit Processes

The nitriles of hydroxy acids are obtained by addition of CN to what?(a) Alcohol(b) Aldehyde(c) Carboxylic acid(d) KetonesI had been asked this question in final exam.My question is based upon Esterification of Carboxylic Acid and Derivatives topic in division Esterification of Unit Processes

What do we get on mixing NH3 with ester?(a) Amide(b) Alcohol(c) Acid amide(d) None of the mentionedI had been asked this question during an interview.I need to ask this question from Esterification of Carboxylic Aacid and Derivatives in portion Esterification of Unit Processes

Which is the commonly used catalysts for alcoholysis?(a) Aluminium oxide(b) Sodium alkoxides(c) Iron oxide(d) All of the mentionedI had been asked this question in an interview.My query is from Esterification of Carboxylic Aacid and Derivatives in section Esterification of Unit Processes

What is the counterpart of alcoholysis called?(a) Acidolysis(b) Aldehyde(c) Both acidolysis and aldehyde(d) None of the mentionedThis question was addressed to me in an interview for job.Query is from Esterification of Carboxylic Aacid and Derivatives in chapter Esterification of Unit Processes

Titanium esters are excellent esterexchange catalysts.(a) True(b) FalseI have been asked this question in quiz.My question is based upon Esterification of Carboxylic Aacid and Derivatives in section Esterification of Unit Processes

Ternary azeotrope can be easily separated by distillation.(a) True(b) FalseI got this question in an online quiz.This intriguing question originated from Completing Esterification topic in portion Esterification of Unit Processes

A mixture of amyl nitrite and ethyl alcohol produces what?(a) Nitrile(b) Nitrosamine(c) Nitro ethyl alcohol(d) Ethyl nitriteThe question was posed to me in semester exam.Origin of the question is Esterification of Carboxylic Aacid and Derivatives topic in portion Esterification of Unit Processes

Complete the following reaction: CH3COOC2H5 + HOCH3 ——> _______ + HOC2H5.(a) CH3COCH3(b) CH3COCH2CH3(c) CH3COOCH3(d) CH3COOCH2The question was asked in my homework.My query is from Esterification of Carboxylic Aacid and Derivatives topic in chapter Esterification of Unit Processes