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An organic nitrogen compound, X, gives ammonia on warming with dilute aqueous sodium hydroxide, X could be A) ethanamide B) ethylamine C) phenylamine D) amino ethanoic acid

An organic nitrogen compound, X, gives ammonia on warming with dilute aqueous sodium hydroxide, X could be A) ethanamide B) ethylamine C) phenylamine D) amino ethanoic acid

Organic Chemistry
Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter22: Reactions Of Benzene And Its Derivatives
Section: Chapter Questions
Problem 22.51P
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Answer Q7, 8, 9 showing detailed explanations.

C) a nitrile D) an amine nitrite salt DIRECTIONS: Each of the following questions or incomplete statements below is followed by four suggested answers lettered A - D. Select or choose the letters of the best answer to the question or incomplete statement. 7. An organic nitrogen compound, X, gives ammonia on warming with dilute aqueous sodium hydroxide, X could be A) ethanamide B) ethylamine C) phenylamine D) amino ethanoic acid Which one of the following reagents reacts 1. in a similar fashion with both phenylamine (C H,NH,) and ethylamine. A) Br,(aq) C) conc. HNO, D) cold HNO (aq) 2. Phenylamine (aniline) can be prepared by reducing nitrobenzene with tin and concerntrated hydrochloric acid followed by the addition of alkali and finally steam distillation. The alkali is added to; A) prevent oxidation of phenylamine. B) liberate free phenylamine from solution C) dissolve excess nitro benzene D) dissolve the phenylamine 8. Arrange the following molecules in their increasing order of base strength, starting with the least B) conc.H SO, CH,CH,NHCH,, CH,CH,CH,NH CH,CH,CONH, CH,CH,NH, II A) II, I, IV and II C) fl, IV, Il andI IV B) ill, IV, I and II D) IV, I1, i and II The correct product for the reaction between propanamide CH,CH CONH, with Br /KOH is A) CH CHBICONH, B) CH CH NH, C) CH CH,CH NH, D) CH,CH,CONHBI 9. Which one of the following statements best explains why trimethylamine [(CH,) N] has a lower boiling point than dimethyiamine (CH,),NH]? A) (CH) N has a larger relative molecular 3. 10. What name is given to the reaction of acid amide and bromine in a solution of aqueous alkali foilowed by heating. A) Hofmann degradation B) Hofmann decarboxylation C) reduction D) Hofmann reduction. mass B) (CH) N molecule is symmetrical C) (CH) N cannot hydrogen bond with itself D) (CH) N molecules have a larger volume 4. When benzonitrile (C H CN) is refluxed with 5 moledm HCI for serveral minutes, and then allowed to cool, white crystals rapidly 11. Arrange, ammonia, 1" amine, 2 amine and separate from the mixture. The white crystals are: A) NH,CI C) C,H,CO,H D) CHCO,NH, 3 amine in order of increasing basicity starting with the least we have A) NH, < 1° amine < 2" amine < 3° amine B) 3 amine < 2°amine <1° amine <NH, C) NH, <3° amine <1° amine < 2° amine D) NH, <3° amine < 2° amine <1° amine B) CH,CONH, Which of the following liquids will be used to extract aniline (phenylamine) from crude aniline after preparation? A) ethanol B) .ether C) aqueous sodium hydroxide D) dilute hydrochloric acid 5. 361
Transcribed Image Text:C) a nitrile D) an amine nitrite salt DIRECTIONS: Each of the following questions or incomplete statements below is followed by four suggested answers lettered A - D. Select or choose the letters of the best answer to the question or incomplete statement. 7. An organic nitrogen compound, X, gives ammonia on warming with dilute aqueous sodium hydroxide, X could be A) ethanamide B) ethylamine C) phenylamine D) amino ethanoic acid Which one of the following reagents reacts 1. in a similar fashion with both phenylamine (C H,NH,) and ethylamine. A) Br,(aq) C) conc. HNO, D) cold HNO (aq) 2. Phenylamine (aniline) can be prepared by reducing nitrobenzene with tin and concerntrated hydrochloric acid followed by the addition of alkali and finally steam distillation. The alkali is added to; A) prevent oxidation of phenylamine. B) liberate free phenylamine from solution C) dissolve excess nitro benzene D) dissolve the phenylamine 8. Arrange the following molecules in their increasing order of base strength, starting with the least B) conc.H SO, CH,CH,NHCH,, CH,CH,CH,NH CH,CH,CONH, CH,CH,NH, II A) II, I, IV and II C) fl, IV, Il andI IV B) ill, IV, I and II D) IV, I1, i and II The correct product for the reaction between propanamide CH,CH CONH, with Br /KOH is A) CH CHBICONH, B) CH CH NH, C) CH CH,CH NH, D) CH,CH,CONHBI 9. Which one of the following statements best explains why trimethylamine [(CH,) N] has a lower boiling point than dimethyiamine (CH,),NH]? A) (CH) N has a larger relative molecular 3. 10. What name is given to the reaction of acid amide and bromine in a solution of aqueous alkali foilowed by heating. A) Hofmann degradation B) Hofmann decarboxylation C) reduction D) Hofmann reduction. mass B) (CH) N molecule is symmetrical C) (CH) N cannot hydrogen bond with itself D) (CH) N molecules have a larger volume 4. When benzonitrile (C H CN) is refluxed with 5 moledm HCI for serveral minutes, and then allowed to cool, white crystals rapidly 11. Arrange, ammonia, 1" amine, 2 amine and separate from the mixture. The white crystals are: A) NH,CI C) C,H,CO,H D) CHCO,NH, 3 amine in order of increasing basicity starting with the least we have A) NH, < 1° amine < 2" amine < 3° amine B) 3 amine < 2°amine <1° amine <NH, C) NH, <3° amine <1° amine < 2° amine D) NH, <3° amine < 2° amine <1° amine B) CH,CONH, Which of the following liquids will be used to extract aniline (phenylamine) from crude aniline after preparation? A) ethanol B) .ether C) aqueous sodium hydroxide D) dilute hydrochloric acid 5. 361
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