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72 Aliphatic carboxylic acids can be prepered by 1 the oxidation of tertary alcohols using an acidified manganate (VI) solution 2 hydrolysing acid anhydrides 3. the oxidation of methylketones in the haloform reaction

72 Aliphatic carboxylic acids can be prepered by 1 the oxidation of tertary alcohols using an acidified manganate (VI) solution 2 hydrolysing acid anhydrides 3. the oxidation of methylketones in the haloform reaction

Organic Chemistry
Organic Chemistry
9th Edition
ISBN:9781305080485
Author:John E. McMurry
Publisher:John E. McMurry
Chapter5: Stereochemistry At Tetrahedral Centers
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Answer Q 72, 73 & 74 showing clearly all working and detailed explanations

Directions summarised A B 1,2,3 1,2 2,3 Only All Only Only correct correct correct correct
Transcribed Image Text:Directions summarised A B 1,2,3 1,2 2,3 Only All Only Only correct correct correct correct
77. Lactc acid (CH CHOHCOOH) can exnibit 1. functional group isonerism 2 position isomerism 3. oplical isomerism TYPE THREE QUESTIOIN Questions 71 - 88 DIRECTIONS: For each of the questions below, ONE or MORE of the resporises is (are) correct Decide which of the responses is (are) correct. Then choose A if1, 2 and 3 are all correct BIrt and 2 only are correct C. 12 and 3 only are correct D. If 3 only is correct 78. Esters 1. are prepared by refluxing alcohols with acid anhydride 2. of long chain carboxylic acids underco alkali hydrolysis to form soap 3. react with ammonia to form amines DIRECTIONS SUMMARISED Questions (79 - 82) relate to the following derivatives of carboxylic acid. 1. CH -C- OCH CH, C D 1.2.3 are 1,2 only 2.3 only 3 only are correct are correct is correct corect 71. Oxalic acid (ethanedioic acid) 1. cannot be oxidised by potassium -c- CH, 2 CH, -C permanganate (VII) 2. TYPE is the simplest aliphatic dicarboxylic acid 3. Que is used in volumetric analysis 3. CH -C CI DIRE 72 Aliphatic carboxylic acids can be prepared by 79. Which of them react(s) with water to form ethanoic acid? 80 Which of them are(is) reduced to ethano by lithium tetrahydridoalumiriate (1lIl) LIAIH, in dry ether? 81. Which of them react(s) with ammonia to give 1. the oxidation of tertiary alcohols using an acidified manganate (VI) solution 2 hydrolysing acid anhydrides 3. the oxidation of methylketones in the haloform reaction 73. Methanoic acid an amide? 82. Which react(s) with hydrogen in the presence of pailadium in contact with Baso can be dehydrated by conc.sulphunic acid to give carbon monoxide 2. gives a black precipilate on warming with Tollen's reagent gives a reddish precipitate on warining with Fehling's solution 1. to give ethanal? 3. 83. Aliphatic amides 1. are prepared by heating the corresponding aliphatic armmonium carboxylate salt 2. will lost a-CO-group when treated wilth bromate(1) in an alkali 3. 74. Eihanoic acid is a 1. weaker acid than benzoic acid 2. weaker acid than chloroethanoic acid 3. stronger acid than propenoic acid 75 Ethanoylchloride can be coverted into the corresponding acid by reacting with NaNO/HCI. 1. is rapidly hydrolysed by water to give methanoic acid 2. reacts with ammonia to give amines reacts with alcohols to give esters 84. Urea ((H N),CO) 1. is an amide because it contains the 76. Ethanoylanhydride 1. reacts with sodium phenoixde to form -C-NH, group 2. has a structure that contains the peptide ester 2. reacts with ammonia to give ethanamide 3. link is prepared by reacting elhanoylchloride with sodlum ethanoate 3. reacts with NANO /HCI to give methanoic acid 358
Transcribed Image Text:77. Lactc acid (CH CHOHCOOH) can exnibit 1. functional group isonerism 2 position isomerism 3. oplical isomerism TYPE THREE QUESTIOIN Questions 71 - 88 DIRECTIONS: For each of the questions below, ONE or MORE of the resporises is (are) correct Decide which of the responses is (are) correct. Then choose A if1, 2 and 3 are all correct BIrt and 2 only are correct C. 12 and 3 only are correct D. If 3 only is correct 78. Esters 1. are prepared by refluxing alcohols with acid anhydride 2. of long chain carboxylic acids underco alkali hydrolysis to form soap 3. react with ammonia to form amines DIRECTIONS SUMMARISED Questions (79 - 82) relate to the following derivatives of carboxylic acid. 1. CH -C- OCH CH, C D 1.2.3 are 1,2 only 2.3 only 3 only are correct are correct is correct corect 71. Oxalic acid (ethanedioic acid) 1. cannot be oxidised by potassium -c- CH, 2 CH, -C permanganate (VII) 2. TYPE is the simplest aliphatic dicarboxylic acid 3. Que is used in volumetric analysis 3. CH -C CI DIRE 72 Aliphatic carboxylic acids can be prepared by 79. Which of them react(s) with water to form ethanoic acid? 80 Which of them are(is) reduced to ethano by lithium tetrahydridoalumiriate (1lIl) LIAIH, in dry ether? 81. Which of them react(s) with ammonia to give 1. the oxidation of tertiary alcohols using an acidified manganate (VI) solution 2 hydrolysing acid anhydrides 3. the oxidation of methylketones in the haloform reaction 73. Methanoic acid an amide? 82. Which react(s) with hydrogen in the presence of pailadium in contact with Baso can be dehydrated by conc.sulphunic acid to give carbon monoxide 2. gives a black precipilate on warming with Tollen's reagent gives a reddish precipitate on warining with Fehling's solution 1. to give ethanal? 3. 83. Aliphatic amides 1. are prepared by heating the corresponding aliphatic armmonium carboxylate salt 2. will lost a-CO-group when treated wilth bromate(1) in an alkali 3. 74. Eihanoic acid is a 1. weaker acid than benzoic acid 2. weaker acid than chloroethanoic acid 3. stronger acid than propenoic acid 75 Ethanoylchloride can be coverted into the corresponding acid by reacting with NaNO/HCI. 1. is rapidly hydrolysed by water to give methanoic acid 2. reacts with ammonia to give amines reacts with alcohols to give esters 84. Urea ((H N),CO) 1. is an amide because it contains the 76. Ethanoylanhydride 1. reacts with sodium phenoixde to form -C-NH, group 2. has a structure that contains the peptide ester 2. reacts with ammonia to give ethanamide 3. link is prepared by reacting elhanoylchloride with sodlum ethanoate 3. reacts with NANO /HCI to give methanoic acid 358
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