Answer Q18, 19, 20 Questions 10-49DIRECTIONS: Each of the following questionsor incomplete statements below is followedby four suggested answers lettered A D.Solect or choose the letters of the best answerto the question or incomptete statement.QueThe real10. Acid chtorides are obtained by treatingCarboxylic acid withA) HCIC)SOCI,B) CID) NaCISuitabieyield canckds is slow227A) concB) dif.C) NaDI ca10.Which one of the following aubstances isthe main organic product when CICH COOHIs refluxed with aqueous NaOH?.A) CICH COONaB) HOCH COOHC) OHCH COONAD) NAOCH COOHArrango the following compounds in orderof their increasing strengths as acids puttingthe weakest first1) CH CO H.3) CH CICO HA) 1>2> 3C) 3>1> 2172) CH,CH,CO HB) 2 > 3>1WhatD) 2<1<3reverA)B)C)D)11.Which one of the following substancesWould be oxidised to 2- methyipropanoi (CH CO C H.) from ethanol and othanoic acid, aacid?A) CH CH CH(OH)CH,B) (CH) CHOHC) (CH.),CHCH,OHD) (CH) CHCHCH OH12. Which one of the following carboxylic acidsis the strongest?A) CHF CH COOHB) CH FCH COOHC) CH CHFCOOHD) CH,FCHFCOOHQuestions 18 and 19In the laboratory proparation of ethylethanatelittle concentrated sulphunc acid is added to thereaction mixture.Th25in18 What is the purpose of the concentratedsulphuric acidA) to polarised the alcoholB) to inhibit the reactionC) to cause the reaction to go fasterD) to acidify the mediumis19. What is the general name for this type ofreaction?A) esterification B) ethanoylationC) acylation13,When phenylmethanoate is hydrolysed byexcess NaOH(aq), the products of the reactionD) saponificationare26The systematic name of the compound withstructural formula20A) phenoxide ion and methanolB) phenol and methanoate ionC) benzoate ion and methanolD) phonol and methanoic acidHOH%3D14.isTo which of the following classes of organiccompounds doesHOC HA) ethanedioic acidB) transbutanedioic acidC) transbutenedioic acidD) cis butanedioic acidCH-0-Cbelong?A) aldehydesC) estersB) carboxylic acidD) Ketones21. Name the compound with tormulaCH CICOCIA) 1, 2 -dichloro ethanoneB) chloroethanyl chlorideC) 1, 2- dichloro ethanalD) dichloro ethanoyl chloride15. An ester was reflux with aqueous sodiumhydroxide and then distilled. The distillategave a yellow precipitate on warming wilthiodine in aqueous sodium hydroxide. Theresidue in the flask gave a white precipitatewhen dilute hydrochloric acid was added. Apossible forumula for the orginal ester isA) CH,CO,C,H,B) CH,CO,CH,C) CH,CH,CHO CH,D) CH,CO,CH,CH,22. Arranging the following inorder of increasingacid strength starting with the least acidic wehave:A) CH,CH,CO,H, CH,CICO,H, CH CO.H, HCO,HB) HCO,H, CH,CO,H, CH,CICO,H, CH,CH,CO,HC) CH,CH,CO,H, HCO,H, CH.CO,H, CH,CiCO,HD) CH,CH,CO,H, C,H,CO,H, HOO,H, CH,CICO,H354

Esters are type of organic compound, which are derivatives of carboxylic acids. Esters can be…

Questions 18 and 19 In the laboratory proparation of ethylethanate (CH CO CH) from ethanol and othanoic acid, a little concentrated sulphunc acid is added to the reaction mixture. 18 What is the purpose of the concentrated sulphuric acid A) to polarised the alcohol B) to inhibit the reaction C) to cause the reaction to go faster D) to acidify the medium 19. What is the general name for this type of reaction? A) esterification B) ethanoylation C) acylation D) saponification 20 The systematic name of the compound with structural formula H is ic HOC H A) ethanedioic acid B) transbutanedioic acid C) transbutenedioic acid D) cis butanedioic acid