99 + Interview Questions in Sulfonation And Sulfation in Unit Processes Page 1 InterviewSolution

1.	The production of Ethanol from Ethylene is done in which type of process?(a) Batch process(b) Continuous process(c) Semi batch process(d) All of the mentionedI have been asked this question during a job interview.Question is taken from Technical Preparations in section Sulfonation and Sulfation of Unit Processes
Answer» RIGHT answer is (B) Continuous process For explanation I would SAY: The process operates under FULLY continuously process.

Discussion

2.	Complete the following reaction: (CH3)2O + SO3 ——> _______ .(a) (CH3)2SO(b) (CH3)2SO2(c) (CH3)2SO3(d) (CH3)2SO4The question was asked in quiz.My enquiry is from Technical Preparations in chapter Sulfonation and Sulfation of Unit Processes
Answer» Correct choice is (d) (CH3)2SO4 Easiest explanation: The PROCESS is KNOW as Sulfation of Dimethyl ETHER with SO3, and the reaction is: (CH3)2O + SO3 ——> (CH3)2SO4.

Discussion

3.	Aniline sulfate is converted to sulfanilic acid by “baking”.(a) True(b) FalseI had been asked this question in an online interview.My doubt stems from Technical Preparations topic in division Sulfonation and Sulfation of Unit Processes
Answer» CORRECT answer is (a) True The explanation: Sulfanilic ACID from Aniline, here Aniline sulfate is converted to sulfanilic acid by “BAKING”, the FOLLOWING reaction is : H2NC6H5-H2SO4 ——> H2NC6H5SO3H + H20.

Discussion

4.	The quinone is sulfonated with 20 per cent oleum in the presence of which catalyst?(a) Mercury sulfate(b) Magnesium sulfate(c) Chlorine(d) Zinc sulphateThe question was posed to me in a job interview.My query is from Technical Preparations topic in chapter Sulfonation and Sulfation of Unit Processes
Answer» RIGHT answer is (a) Mercury sulfate The BEST EXPLANATION: Anthraquinone-I-sulfonate (POTASSIUM Salt), the quinone is sulfonated with 20 per cent OLEUM in the presence of mercury sulfate catalyst.

Discussion

5.	Acetanilide is reacted with chlorosulfonic acid to yield what?(a) Sulfonyl acetate(b) Sulfonyl anilide(c) Sulfonyl chloride(d) None of the mentionedThe question was asked in quiz.Enquiry is from Technical Preparations topic in section Sulfonation and Sulfation of Unit Processes
Answer» Correct answer is (c) Sulfonyl CHLORIDE Easiest explanation: The Chlorosulfonation of ACETANILIDE, here Acetanilide is reacted with chlorosulfonic acid to YIELD the sulfonyl chloride, which is used as an INTERMEDIATE for nearly all sulpha drugs.

Discussion

6.	What is the other name of Dodecylbenzene?(a) Alkyl benzene(b) Detergent alkylate(c) Benzoate alcohol(d) None of the mentionedI got this question in an online quiz.The origin of the question is Technical Preparations in chapter Sulfonation and Sulfation of Unit Processes
Answer» The correct CHOICE is (B) Detergent alkylate To EXPLAIN I would say: Detergent alkylate is also CALLED Dodecylbenzene.

Discussion

7.	What is the use of Lauryl sulphate?(a) Foaming agent(b) Cleaning agent(c) Drying agent(d) Wetting agentThis question was posed to me in quiz.I'm obligated to ask this question of Technical Preparations in section Sulfonation and Sulfation of Unit Processes
Answer» The correct option is (a) FOAMING agent Explanation: Lauryl sulphate is USED in soap because of its excellent detergent QUALITY and foaming PROPERTIES.

Discussion

8.	What is the formula of formaidehyde-bisulfite ?(a) HOCH2SO3Na(b) CH3SO3Na(c) HOCH2SO4(d) HOCH3SO2NaI have been asked this question by my school principal while I was bunking the class.Origin of the question is Technical Preparations topic in chapter Sulfonation and Sulfation of Unit Processes
Answer» Right ANSWER is (a) HOCH2SO3NA Easiest explanation: formaidehyde-bisulfite ALSO called as “sodium hydroxymethanesulfonate” also, has the FOLLOWING formula HOCH2SO3Na.

Discussion

9.	Sulfonation-Desulfonation is useful in preparation of what?(a) Ortho isomer(b) Para isomer(c) Meta isomer(d) None of the mentionedThe question was posed to me by my college professor while I was bunking the class.My question is taken from Desulfonation Reactions in chapter Sulfonation and Sulfation of Unit Processes
Answer» Right ANSWER is (a) Ortho ISOMER To EXPLAIN I would say: Sulfonation-desulfonation is a useful tool for PREPARING ortho isomer derivatives of benzene.

Discussion

10.	Sulfonation, followed by desulfonation method cannot be used for separation of Aromatic compounds.(a) True(b) FalseI had been asked this question in exam.Question is taken from Desulfonation Reactions in section Sulfonation and Sulfation of Unit Processes
Answer» The correct choice is (b) False To explain: Sulfonation, FOLLOWED by desulfonation, has been used to separate mixtures of AROMATIC COMPOUNDS not EASILY separable by distillation. Either or both steps can be selective.

Discussion

11.	What effect does increased ring methylation has on Sulfonation?(a) Increases(b) Decreases(c) Neutral(d) None of the mentionedI have been asked this question in an online interview.Question is from Desulfonation Reactions topic in portion Sulfonation and Sulfation of Unit Processes
Answer» The correct CHOICE is (a) Increases Easy explanation: It is KNOWN that increased ring methylation GENERALLY lowers the desulfonation TEMPERATURE for both hydrocarbon and PHENOLIC sulfonates.

Discussion

12.	Which of the following is/are mineral acid?(a) Phosphoric(b) Hydrochloric(c) Hydrobromic(d) All of the mentionedThis question was addressed to me by my school teacher while I was bunking the class.My question is based upon Desulfonation Reactions topic in chapter Sulfonation and Sulfation of Unit Processes
Answer» RIGHT choice is (d) All of the mentioned Best explanation: SULFURIC, PHOSPHORIC, HYDROCHLORIC, hydrobromic comes under Mineral ACIDS.

Discussion

13.	What effect does Mineral acid has on Desulfonation reaction?(a) Increases reaction rate(b) Decrease reaction rate(c) No effect on it(d) Inhibits the reactionI got this question in homework.This interesting question is from Desulfonation Reactions topic in section Sulfonation and Sulfation of Unit Processes
Answer» The correct answer is (a) INCREASES reaction rate Explanation: Desulfonation reaction, which is the REVERSE of SULFONATION, generally PROCEEDS rapidly and in good yield, especially in the presence of an added MINERAL.

Discussion

14.	Which type of reaction is the following: RSO3H + HOH ——> RH + H2SO4.(a) Sulfonation(b) Desulfonation(c) Chlorosulfonation(d) RearrangementThis question was posed to me during an interview.Origin of the question is Desulfonation Reactions in section Sulfonation and Sulfation of Unit Processes
Answer» Right OPTION is (B) Desulfonation For EXPLANATION: The following REACTION is Desulfonation of Aromatic SULFATES.

Discussion

15.	Hydrolytically sulfonated is reacted in which medium?(a) Aqueous basic medium(b) Aq. Acidic medium(c) Neutral medium(d) None of the mentionedThis question was addressed to me in examination.This intriguing question comes from Desulfonation Reactions in chapter Sulfonation and Sulfation of Unit Processes
Answer» Right ANSWER is (b) AQ. ACIDIC medium Explanation: Aromatic sulfonates are hydrolytically desulfonated by HEATING in aqueous acid medium.

Discussion

16.	What is (dH)D ?(a) Heat of Sulfonation(b) Heat of Dissociation(c) Heat of Deformation(d) Heat of FormationThis question was addressed to me during a job interview.Question is from Kinetics, Mechanism and Thermodynamics in division Sulfonation and Sulfation of Unit Processes
Answer» CORRECT option is (b) HEAT of Dissociation Explanation: “(dH)D” is called Heat of Dissociation of Sulfonating AGENTS into SO3 vapor and COMPOUND REAGENT.

Discussion

17.	Which type of reaction is the heat of Sulfonation reaction?(a) Exothermic(b) Endothermic(c) Neutral(d) None of the mentionedThis question was posed to me during an online exam.I would like to ask this question from Kinetics, Mechanism and Thermodynamics topic in division Sulfonation and Sulfation of Unit Processes
Answer» The correct option is (a) Exothermic For explanation I would SAY: The HEAT of sulfonation with SO3 VAPOUR which is dHv is an exothermic reaction.

Discussion

18.	Complete the following reaction: ROH + H2SO4 _______+ H2O.(a) RSO2H(b) RSO3H(c) ROSO3H(d) None of the mentionedThis question was addressed to me in homework.I'm obligated to ask this question of Kinetics, Mechanism and Thermodynamics topic in portion Sulfonation and Sulfation of Unit Processes
Answer» Right choice is (c) ROSO3H Explanation: The REACTION is as follows:ROH + H2SO4 <=======> ROSO3H + H2O.

Discussion

19.	Why is the intermediate compound in Sulfonation electrically more stable ?(a) It contains negative charge(b) It contains positive charge(c) It’s neutral(d) None of the mentionedThe question was posed to me during a job interview.I'd like to ask this question from Kinetics, Mechanism and Thermodynamics in section Sulfonation and Sulfation of Unit Processes
Answer» Correct choice is (a) It CONTAINS negative charge The explanation: The intermediate COMPOUND above is electrically NEUTRAL and, therefore, more STABLE than the analogous intermediates involved in nitration and halogenation, which BEAR positive charges.

Discussion

20.	Which of the following is a true Sulfonating agent?(a) SO3(b) H3SO4+(c) HSO3+(d) All of the mentionedI have been asked this question during an interview for a job.This is a very interesting question from Kinetics, Mechanism and Thermodynamics in section Sulfonation and Sulfation of Unit Processes
Answer» The correct answer is (d) All of the mentioned To explain I WOULD say: In an aqueous sulfuric acid as many as four different reactive SPECIES have been proposed as the true SULFONATING agent: (1) H2SO4+, (2) SO3 or a solvate, (3) H80a+ or a solvate, and (4) S2O6 (dimeric SO3).

Discussion

21.	Aromatic substitution reactions, including sulfonation, are conceived in two steps.(a) True(b) FalseThe question was posed to me in an interview for internship.This key question is from Kinetics, Mechanism and Thermodynamics in chapter Sulfonation and Sulfation of Unit Processes
Answer» Right CHOICE is (a) True Easiest explanation: Aromatic substitution reactions, including sulfonation, are conceived as proceeding in two STEPS, the first involving REAGENT attack and the second PROTON REMOVAL.

Discussion

22.	When H2SO4 is used as a Sulfonating agent, what effect does formation of water has on the reaction?(a) Slows down the reaction(b) Fast the reaction(c) Reduces activation energy(d) None of the mentionedThis question was addressed to me in examination.I need to ask this question from Kinetics, Mechanism and Thermodynamics in section Sulfonation and Sulfation of Unit Processes
Answer» Correct answer is (a) SLOWS down the reaction Explanation: When sulfuric ACID is used as the SULFONATING agent, the formation of water slows the reaction to such DEGREE that rate studies can often be made only during the initial stages, rate of sulfonation is inversely proportional to the SQUARE of the water concentration.

Discussion

23.	How does Sulfonation differ from other reactions?(a) Reaction temperature(b) Reversible reaction(c) Both temperature and reversible reaction(d) None of the mentionedThe question was asked during an interview for a job.I need to ask this question from Kinetics, Mechanism and Thermodynamics in division Sulfonation and Sulfation of Unit Processes
Answer» Right ANSWER is (c) Both temperature and reversible reaction To elaborate: Sulfonation, DIFFERS from these other reactions in two MARKED respects: it is reversible, and reaction temperature can, in CERTAIN CASES, have an important influence on the position of the entering group.

Discussion

24.	Which of the following aromatic sulfonation is not an electrophilic substitution reaction?(a) Nitration(b) Halogenation(c) Alkylation(d) None of the mentionedI had been asked this question during an online exam.This interesting question is from Kinetics, Mechanism and Thermodynamics topic in chapter Sulfonation and Sulfation of Unit Processes
Answer» The CORRECT option is (d) None of the mentioned Best EXPLANATION: Aromatic sulfonation, LIKE NITRATION, halogenation, ALKYLATION, and acylation, is a typical electrophilic substitution reaction.

Discussion

25.	Which compound is used for ‘Baking process’ of sulfonating aromatic amines?(a) Ortho-dichlorobenzene(b) Para-dichlorobenzene(c) Meta-dichlorobenzene(d) All of the mentionedI got this question in an interview for job.I would like to ask this question from Catalyst and Sulfonating Agents in division Sulfonation and Sulfation of Unit Processes
Answer» The correct CHOICE is (a) Ortho-dichlorobenzene Easiest explanation: Ortho-dichlorobenzene or similar compounds are USED in a MODIFIED form of the “baking process” for sulfonating aromatic AMINES.

Discussion

26.	Why is the use of reaction solvents is important?(a) Efficient mixing(b) Uniform reaction(c) Reduce reaction temperature(d) Both efficient mixing and uniform reactionI have been asked this question during an online interview.My question is based upon Catalyst and Sulfonating Agents in division Sulfonation and Sulfation of Unit Processes
Answer» The correct choice is (d) Both EFFICIENT MIXING and UNIFORM reaction The best I can EXPLAIN: The use of reaction solvents is therefore OFTEN either essential or preferable to obtain efficient mixing, thereby ensuring uniform reaction.

Discussion

27.	Which of the following compound inhibits sulfone formation?(a) Acetic acid(b) Mercury(c) Sulphuric acid(d) None of the mentionedI have been asked this question by my school principal while I was bunking the class.I want to ask this question from Catalyst and Sulfonating Agents topic in division Sulfonation and Sulfation of Unit Processes
Answer» Right answer is (a) ACETIC ACID Easy EXPLANATION: The ADDITION of acetic acid inhibits, but does not eliminate, sulfone formation. Sodium sulphate and sodium benzenesulfonate are also said to inhibit sulfone formation from BENZENE.

Discussion

28.	What effect does addition of Catalyst has on the sulfonation reaction?(a) Lowers reaction temp.(b) Improves yield(c) Accelerates reaction(d) All of the mentionedI have been asked this question in an internship interview.The question is from Catalyst and Sulfonating Agents topic in chapter Sulfonation and Sulfation of Unit Processes
Answer» CORRECT choice is (d) All of the mentioned To elaborate: The addition of CATALYSTS SOMETIMES allows the USE of lower reaction temperatures, improves yields, accelerates reaction, or in some cases even RENDERS reaction possible.

Discussion

29.	Mercury can also increase the yield without changing the orientation.(a) True(b) FalseI had been asked this question during an interview for a job.Origin of the question is Catalyst and Sulfonating Agents topic in portion Sulfonation and Sulfation of Unit Processes
Answer» The correct answer is (a) True To explain I WOULD say: Mercury is sometimes USED to increase the yield in CERTAIN difficult sulfonations, but without changing the ORIENTATION.

Discussion

30.	Mercury affects the orientation of which of the following compounds?(a) Nitrobenzene(b) Benzene sulfonic acid(c) O-xylene(d) All of the mentionedI got this question in exam.My question is from Catalyst and Sulfonating Agents in chapter Sulfonation and Sulfation of Unit Processes
Answer» RIGHT answer is (d) All of the mentioned The best explanation: Mercury affects the orientation of other organic COMPOUNDS than ANTHRAQUINONE, INCLUDING: benzoic acid, PHTHALIC anhydride, a-naphthol, nitrobenzene, benzenesulfonic acid, o-xylene, and chloroanthraquinones.

Discussion

31.	Mercury catalyst does not function with which compound?(a) Aqueous acid(b) SO3(c) Oleum(d) All of the mentionedThis question was posed to me in an interview for job.My query is from Catalyst and Sulfonating Agents in chapter Sulfonation and Sulfation of Unit Processes
Answer» Right OPTION is (a) Aqueous acid For explanation: Mercury functions catalytically only when USING oleum or SO3 as the sulfonating AGENT. It does not function with aqueous acid, the use of which PRESUMABLY inhibits one of the intermediate steps.

Discussion

32.	R-HgSO4H + SO3 ——> RSO3H + HgSO4. Which type of reaction is the following?(a) Substitution reaction(b) Replacement reaction(c) Addition reaction(d) None of the mentionedThis question was posed to me by my college director while I was bunking the class.This intriguing question comes from Catalyst and Sulfonating Agents in chapter Sulfonation and Sulfation of Unit Processes
Answer» Correct OPTION is (b) REPLACEMENT reaction Easiest explanation: The above organic mercurial intermediate which is formed, the COMPOUND actually undergoing a replacement-type sulfonation.

Discussion

33.	The addition of mercury changes the orientation in a number of aromatic sulfonation reactions.(a) True(b) FalseI had been asked this question by my college director while I was bunking the class.Asked question is from Catalyst and Sulfonating Agents topic in section Sulfonation and Sulfation of Unit Processes
Answer» CORRECT choice is (a) True Explanation: The ADDITION of mercury changes the orientation in a number of aromatic sulfonation REACTIONS. This is of great practical importance especially with anthraquinone, since in the PRESENCE of the catalyst the a-sulfonate is formed almost exclusively, while without mercury only the, B-sulfonate is OBTAINED.

Discussion

34.	Low temperatures with correspondingly long reaction periods is more useful.(a) True(b) FalseThe question was asked in semester exam.The above asked question is from Chemical Structures in section Sulfonation and Sulfation of Unit Processes
Answer» Correct option is (a) True Easiest explanation: LOW temperatures with CORRESPONDINGLY LONG reaction periods tend to yield PURER and lighter-coloured PRODUCTS.

Discussion

35.	Does Time of the reaction has any effect on efficiency of reaction?(a) Yes(b) No(c) None of the mentioned(d) Doesn’t depend on itI had been asked this question in a job interview.The above asked question is from Chemical Structures in section Sulfonation and Sulfation of Unit Processes
Answer» RIGHT OPTION is (a) Yes Explanation: To obtain maximum EFFICIENCY in COMMERCIAL sulfonation and sulfation, the reaction time must be REDUCED to the minimum compatible with product quality and yield.

Discussion

36.	What prevents the formation of Sulfonated compounds with SO3?(a) Mercury catalyst(b) Steric hindrance(c) All of the mentioned(d) None of the mentionedThe question was asked during an internship interview.My question is from Chemical Structures in division Sulfonation and Sulfation of Unit Processes
Answer» RIGHT answer is (b) STERIC HINDRANCE Easiest explanation: Steric hindrance prevents formation of the difficultly sulfonatable addition compound with S03.

Discussion

37.	Which compound state is the most difficult to Sulfonate?(a) Primary(b) Secondary(c) Tertiary(d) None of the mentionedThe question was posed to me in an interview.My question is from Chemical Structures in chapter Sulfonation and Sulfation of Unit Processes
Answer» Right CHOICE is (c) Tertiary For explanation I would SAY: A STUDY of the sulfation of ALCOHOLS with sulfuric acid has shown that primary alcohols sulphate ten TIMES as fast as secondary. Therefore tertiary compounds are the most difficult to sulfonate.

Discussion

38.	Isomeric compounds have no pronounced differences in ease of sulfonation.(a) True(b) FalseI have been asked this question in final exam.My question is from Chemical Structures topic in division Sulfonation and Sulfation of Unit Processes
Answer» Right option is (B) False To explain I would say: ISOMERIC compounds show pronounced differences in ease of sulfonation. The para isomer of xylene is more difficult to react than the other two; this result is in agreement with the general RULE that an entering sulfonate group tends for STERIC reasons to avoid entering a position adjacent to other substituents, since it is fairly bulky.

Discussion

39.	Substitution of the hydrocarbon ring with what increases the ease of sulfonation?(a) Hydroxy group(b) Amino group(c) Alkyl group(d) All of the mentionedThe question was asked in an interview for internship.I want to ask this question from Chemical Structures in portion Sulfonation and Sulfation of Unit Processes
Answer» The correct choice is (d) All of the mentioned The BEST explanation: SUBSTITUTION of the hydrocarbon RING with hydroxyl or amino GROUPS, or with successive alkyl groups, INCREASES the ease of sulfonation as reflected by the rate of reaction.

Discussion

40.	What effect does removal of Sulphuric acid has on Chlorosulfonation reaction?(a) Complete the reaction(b) Increases the activation energy(c) Acts as an inhibitor(d) None of the mentionedThis question was addressed to me in an online quiz.Enquiry is from Chemical Structures topic in division Sulfonation and Sulfation of Unit Processes
Answer» The correct choice is (a) Complete the REACTION Explanation: Removal of the SULFURIC acid formed by chemical means has ALSO been considered as a method for completing the CHLOROSULFONATION reaction.

Discussion

41.	Is use of Excessive Sulfonating agents good for industrial processes?(a) Yes(b) No(c) None of the mentioned(d) Depends on other factorsI have been asked this question during a job interview.My question is from Chemical Structures in section Sulfonation and Sulfation of Unit Processes
Answer» RIGHT answer is (a) Yes For explanation I would say: Use of excess sulfonating AGENT does IMPROVE the yield and is standard laboratory and industrial practice EVEN THOUGH complete reaction is still not achieved.

Discussion

42.	Sulfoalkylating agents are which type of Sulfonate?(a) Inorganic(b) Organic(c) Saturated(d) None of the mentionedI have been asked this question in an internship interview.This is a very interesting question from Chemical Structures topic in section Sulfonation and Sulfation of Unit Processes
Answer» Correct choice is (b) Organic Best explanation: Sulfoalklyating agents are called Organic SULFATES because they contain one to three carbon atoms and a reactive functional group (e.g., HYDROXYL, ALDEHYDE, or olefinic un saturation) allowing easy attachment to an organic compound of higher molecular weight (e.g., a water-insoluble dye) upon which it is desired to confer the PROPERTIES of a sulfonate group, especially water SOLUBILITY.

Discussion

43.	Which of the following Sulphates fastest?(a) Tertiary(b) Secondary(c) Primary(d) None of the mentionedI have been asked this question by my school teacher while I was bunking the class.My question is taken from Chemical Structures in portion Sulfonation and Sulfation of Unit Processes
Answer» RIGHT OPTION is (c) Primary To explain I would say: Sulfation of alcohols with sulfuric acid has shown that primary alcohols sulfate TEN times as fast as SECONDARY, because tertiary provides HINDRANCE to reactions.

Discussion

44.	Formation of the sulfuric acid by chemical means has also been considered as a method for completing the chlorosulfonation reaction.(a) True(b) FalseThe question was posed to me during a job interview.I would like to ask this question from Physical and Chemical Factors topic in portion Sulfonation and Sulfation of Unit Processes
Answer» Correct answer is (b) False The explanation is: Removal of the SULFURIC acid formed by chemical means has also been CONSIDERED as a method for COMPLETING the chlorosulfonation reaction, this way the reaction moves in forward DIRECTION.

Discussion

45.	What is meant by ‘Baking process’?(a) Forward reaction(b) Continous heat(c) Evaporation of water(d) All of the mentionedThis question was addressed to me during an online exam.I need to ask this question from Physical and Chemical Factors topic in portion Sulfonation and Sulfation of Unit Processes
Answer» The CORRECT CHOICE is (c) Evaporation of WATER Explanation: In the baking PROCEDURE, water is REMOVED at high temperature by circulating air or by the use of vacuum.

Discussion

46.	Why do we add BF3 in Sulfonation reactions?(a) Completes the reaction(b) Forward the reaction(c) Removes water(d) All of the mentionedThis question was posed to me in a job interview.Origin of the question is Physical and Chemical Factors in division Sulfonation and Sulfation of Unit Processes
Answer» The correct answer is (d) All of the mentioned To explain: Sulfonation can also be completed by ADDING to the sulfonation mixture a MATERIAL capable of reacting with the water formed, thereby REMOVING it and allowing this reaction to go to COMPLETION. The INTRODUCTION of BFa accomplishes this.

Discussion

47.	What is the formula of thionyl chloride?(a) SO2Cl(b) SOCl2(c) SCl3(d) None of the mentionedI have been asked this question in an interview for job.This intriguing question comes from Physical and Chemical Factors in chapter Sulfonation and Sulfation of Unit Processes
Answer» The correct OPTION is (b) SOCl2 Easy explanation: The formula of thionyl CHLORIDE is SOCl2, which also used for the removal of water in sulfonation REACTION.

Discussion

48.	Excess acid can be used to achieve maximum completion of reaction.(a) True(b) FalseI got this question during an online exam.This is a very interesting question from Physical and Chemical Factors topic in section Sulfonation and Sulfation of Unit Processes
Answer» Right choice is (a) True The EXPLANATION is: Excess acid is ALSO used to achieve maximum completion of REACTION in the sulfation of alcohols. THUS, lauryl alcohol is reacted to the extent of 90 per cent by employing a 70 per cent excess of monohydrate acid, Oleum GIVES excessive decomposition.

Discussion

49.	Complete the following reaction: RH + H2SO4 ——-> _______ + H2O.(a) RSOH(b) RSO2H(c) RSO3H(d) None of the mentionedThis question was addressed to me in an interview for internship.My question is from Physical and Chemical Factors in portion Sulfonation and Sulfation of Unit Processes
Answer» Correct answer is (C) RSO3H Best explanation: The following REACTION is KNOWN as Hydrates of SO3, and the reaction is as: RH + H2SO4 ——-> RSO3H + H2O.

Discussion

50.	What happens to the rate of Sulfonation, if concentration of water decreases?(a) Increases(b) Decreases(c) Both of these(d) Does not depend on itI had been asked this question in exam.My question comes from Physical and Chemical Factors topic in division Sulfonation and Sulfation of Unit Processes
Answer» Correct choice is (a) Increases Easiest EXPLANATION: As the CONCENTRATION of water increases, the rate of sulfonation steadily decreases, SINCE the reaction rate is inversely proportional to the SQUARE of the water concentration.

Discussion

Explore topic-wise InterviewSolutions in .

Complete the following reaction: (CH3)2O + SO3 ——> _______ .(a) (CH3)2SO(b) (CH3)2SO2(c) (CH3)2SO3(d) (CH3)2SO4The question was asked in quiz.My enquiry is from Technical Preparations in chapter Sulfonation and Sulfation of Unit Processes

Aniline sulfate is converted to sulfanilic acid by “baking”.(a) True(b) FalseI had been asked this question in an online interview.My doubt stems from Technical Preparations topic in division Sulfonation and Sulfation of Unit Processes

Acetanilide is reacted with chlorosulfonic acid to yield what?(a) Sulfonyl acetate(b) Sulfonyl anilide(c) Sulfonyl chloride(d) None of the mentionedThe question was asked in quiz.Enquiry is from Technical Preparations topic in section Sulfonation and Sulfation of Unit Processes

What is the other name of Dodecylbenzene?(a) Alkyl benzene(b) Detergent alkylate(c) Benzoate alcohol(d) None of the mentionedI got this question in an online quiz.The origin of the question is Technical Preparations in chapter Sulfonation and Sulfation of Unit Processes

What is the use of Lauryl sulphate?(a) Foaming agent(b) Cleaning agent(c) Drying agent(d) Wetting agentThis question was posed to me in quiz.I'm obligated to ask this question of Technical Preparations in section Sulfonation and Sulfation of Unit Processes

What is the formula of formaidehyde-bisulfite ?(a) HOCH2SO3Na(b) CH3SO3Na(c) HOCH2SO4(d) HOCH3SO2NaI have been asked this question by my school principal while I was bunking the class.Origin of the question is Technical Preparations topic in chapter Sulfonation and Sulfation of Unit Processes

Sulfonation, followed by desulfonation method cannot be used for separation of Aromatic compounds.(a) True(b) FalseI had been asked this question in exam.Question is taken from Desulfonation Reactions in section Sulfonation and Sulfation of Unit Processes

What effect does increased ring methylation has on Sulfonation?(a) Increases(b) Decreases(c) Neutral(d) None of the mentionedI have been asked this question in an online interview.Question is from Desulfonation Reactions topic in portion Sulfonation and Sulfation of Unit Processes

Which type of reaction is the following: RSO3H + HOH ——> RH + H2SO4.(a) Sulfonation(b) Desulfonation(c) Chlorosulfonation(d) RearrangementThis question was posed to me during an interview.Origin of the question is Desulfonation Reactions in section Sulfonation and Sulfation of Unit Processes

What is (dH)D ?(a) Heat of Sulfonation(b) Heat of Dissociation(c) Heat of Deformation(d) Heat of FormationThis question was addressed to me during a job interview.Question is from Kinetics, Mechanism and Thermodynamics in division Sulfonation and Sulfation of Unit Processes

Complete the following reaction: ROH + H2SO4 _______+ H2O.(a) RSO2H(b) RSO3H(c) ROSO3H(d) None of the mentionedThis question was addressed to me in homework.I'm obligated to ask this question of Kinetics, Mechanism and Thermodynamics topic in portion Sulfonation and Sulfation of Unit Processes

Which of the following is a true Sulfonating agent?(a) SO3(b) H3SO4+(c) HSO3+(d) All of the mentionedI have been asked this question during an interview for a job.This is a very interesting question from Kinetics, Mechanism and Thermodynamics in section Sulfonation and Sulfation of Unit Processes

Aromatic substitution reactions, including sulfonation, are conceived in two steps.(a) True(b) FalseThe question was posed to me in an interview for internship.This key question is from Kinetics, Mechanism and Thermodynamics in chapter Sulfonation and Sulfation of Unit Processes

Mercury can also increase the yield without changing the orientation.(a) True(b) FalseI had been asked this question during an interview for a job.Origin of the question is Catalyst and Sulfonating Agents topic in portion Sulfonation and Sulfation of Unit Processes

Mercury affects the orientation of which of the following compounds?(a) Nitrobenzene(b) Benzene sulfonic acid(c) O-xylene(d) All of the mentionedI got this question in exam.My question is from Catalyst and Sulfonating Agents in chapter Sulfonation and Sulfation of Unit Processes

Mercury catalyst does not function with which compound?(a) Aqueous acid(b) SO3(c) Oleum(d) All of the mentionedThis question was posed to me in an interview for job.My query is from Catalyst and Sulfonating Agents in chapter Sulfonation and Sulfation of Unit Processes

Low temperatures with correspondingly long reaction periods is more useful.(a) True(b) FalseThe question was asked in semester exam.The above asked question is from Chemical Structures in section Sulfonation and Sulfation of Unit Processes

Does Time of the reaction has any effect on efficiency of reaction?(a) Yes(b) No(c) None of the mentioned(d) Doesn’t depend on itI had been asked this question in a job interview.The above asked question is from Chemical Structures in section Sulfonation and Sulfation of Unit Processes

What prevents the formation of Sulfonated compounds with SO3?(a) Mercury catalyst(b) Steric hindrance(c) All of the mentioned(d) None of the mentionedThe question was asked during an internship interview.My question is from Chemical Structures in division Sulfonation and Sulfation of Unit Processes

Which compound state is the most difficult to Sulfonate?(a) Primary(b) Secondary(c) Tertiary(d) None of the mentionedThe question was posed to me in an interview.My question is from Chemical Structures in chapter Sulfonation and Sulfation of Unit Processes

Isomeric compounds have no pronounced differences in ease of sulfonation.(a) True(b) FalseI have been asked this question in final exam.My question is from Chemical Structures topic in division Sulfonation and Sulfation of Unit Processes

Is use of Excessive Sulfonating agents good for industrial processes?(a) Yes(b) No(c) None of the mentioned(d) Depends on other factorsI have been asked this question during a job interview.My question is from Chemical Structures in section Sulfonation and Sulfation of Unit Processes

Sulfoalkylating agents are which type of Sulfonate?(a) Inorganic(b) Organic(c) Saturated(d) None of the mentionedI have been asked this question in an internship interview.This is a very interesting question from Chemical Structures topic in section Sulfonation and Sulfation of Unit Processes

Which of the following Sulphates fastest?(a) Tertiary(b) Secondary(c) Primary(d) None of the mentionedI have been asked this question by my school teacher while I was bunking the class.My question is taken from Chemical Structures in portion Sulfonation and Sulfation of Unit Processes

Why do we add BF3 in Sulfonation reactions?(a) Completes the reaction(b) Forward the reaction(c) Removes water(d) All of the mentionedThis question was posed to me in a job interview.Origin of the question is Physical and Chemical Factors in division Sulfonation and Sulfation of Unit Processes

What is the formula of thionyl chloride?(a) SO2Cl(b) SOCl2(c) SCl3(d) None of the mentionedI have been asked this question in an interview for job.This intriguing question comes from Physical and Chemical Factors in chapter Sulfonation and Sulfation of Unit Processes

Excess acid can be used to achieve maximum completion of reaction.(a) True(b) FalseI got this question during an online exam.This is a very interesting question from Physical and Chemical Factors topic in section Sulfonation and Sulfation of Unit Processes

Complete the following reaction: RH + H2SO4 ——-> _______ + H2O.(a) RSOH(b) RSO2H(c) RSO3H(d) None of the mentionedThis question was addressed to me in an interview for internship.My question is from Physical and Chemical Factors in portion Sulfonation and Sulfation of Unit Processes

What happens to the rate of Sulfonation, if concentration of water decreases?(a) Increases(b) Decreases(c) Both of these(d) Does not depend on itI had been asked this question in exam.My question comes from Physical and Chemical Factors topic in division Sulfonation and Sulfation of Unit Processes