Nomenclature of Organic Compound Exercise # 1

NOMENCLATURE OF ORGANIC COMPOUND Exercise # 1 1. 2. 3. The hybrid state of C-atoms which are attached to a single bond with each other in the following structure are : CH2 = CH–C  CH (A) sp2, sp 5. 6. 7. (B) sp3, sp (C) sp2, sp2 (D) sp2, sp3 In the compound HC  C – CH2– CH = CH–CH3, the C2–C3 bond is the type of : (A) sp – sp2 (B) sp3 – sp3 (C) sp – sp3 (D) sp2 – sp2 The number of acetynilic bond in the structure are : (A) 2 4. [Single Correct Choice Type Questions] (B) 3 The group of heterocyclic compound is : (A) Phenol, Furane (B) Furane, Thiophene (C) 1 (D) 4 (C) Thiophene, Phenol (D) Furane, Aniline Which of the following is the first member of ester homologous series ? (A) Ethyl ethanoate (B) Methyl ethanoate (C) Methyl methanoate (D) Ethyl methanoate Which of the following compound’s prefix ‘iso’ is not correct – (A) Iso pentane (B) Iso Hexane (C) Iso butane (D) Iso octane A substance containing an equal number of primary, secondary and tertiary carbon atoms is : (A) Mesityl Oxide (B) Mesitylene (C) Maleic acid (D) Malonic acid CH3 8. How many secondary carbon atoms does methyl cyclopropane have ? (A) Nine 9. (B) One (C) Two The IUPAC name of the compound CH3 CH = C CH2 (A) 2-Ethyl-2-butene 10. 11. (B) 3-Ethyl-2-butene CH3 (D) Three is : CH3 (C) 3-Ethyl-2-butene (D) 3-methyl-2-pentene IUPAC name of CH2 =CH – CH2–CH2 – C  CH is : (A) 1, 4-Hexenyne (B) 1-Hexen-5-yne (C) 1-Hexyne-5-ene (D) 1, 5-Hexyne (CH3)3C – CH=CH2 has the IUPAC name : (A) 3,3 – Dimethyl-1-butene (C) 2, 2-Dimethyl-3-butene (B) 2, 2-Dimethyl-1-butene (D) 1, 3-Dimehtyl-1-propene 12. What is not true about homologous series ? (A) All the members have similar chemical properties (B) They have identical physical properties (C) They can be represented by a general formula (D) Adjacent members differ in molecular mass by 14 13. The homologue of phenol is – CH2OH (A) OH (B) OH CH3 (C) OH OH (D) 14. The IUPAC name of the following is [CH3CH(CH3)]2C(CH2CH3)C(CH3)C(CH2CH3)2 (A) 3,5-Diethyl-4,6-dimethyl-5-[1-methylethyl]hept-3-ene (B) 3, 5-Diethyl-5-isopropyl-4, 6-dimethylhept-2-ene (C) 3,5-Diethyl-5-propyl-4, 6-dimethylhept-3-ene (D) None of these 15. Which of the following is a heterocyclic compound (A) 16. HC=CH HC=CH S (B) HC=COOH (C) HC=COOH HC=CH HC=CH (C) CH2=CH N (D) CH3 CH=CH2 N (C) Pent-1-yne-3-ene The IUPAC name of CH3 – CC – C(CH3)3 is : (A) Methyl tertirarybutyl acetylene (C) 4, 4-Dimethyl-2-pentyne (B) t-Butyl propyne (D) 1, 3, 3, 3 - Tetramethyl ethyne (D) Pent-3-ene-1-yne Give the IUPAC name of CH3 CH2 H3C C CH2 CH H3C CH3 CH CH2 CH2 CH3 CH CH3 (A) 4-isopropyl-5-ter. butyl octane (C) 2-methyl-3-propyl-4-ter. butyl heptane (B) 4-ter. butyl-5-isopropyl octane (D) 2, 2-dimethyl-3-propyl-4-isopropyl heptane As per IUPAC rules, which one of the following groups, will be regarded as the principal functional group ? (A) – C  C – (B) – OH (C) C (D) The number of C-atoms in second member of an ester is/are : (A) 2 (B) 3 (C) 4 C O O 21. C=O CH=CH2 CH3– CH = CH – C  CH, IUPAC name is : (A) Pent-2-ene-4-yne (B) Pent-4-yne-2-ene CH3 20. HC=CH CH3 CH3 19. HC=CH (B) CH3CH2 N CH=CH2 CH3 CH3 18. (D) Ethyl methyl vinyl amine has the structure – (A) CH3CH2 N CH2CH=CH2 17. CH 2 (D) 1 22. The number of primary, secondary and tertiary carbon atom in toluene is given by the set : (A) 1, 6, 0 (B) 1, 5, 1 (C) 2, 5, 0 (D) 1, 6, 1 23. C3H6Br2 can shows : (A) Two gem dibromide (C) Two tert. dibromo alkane (B) Three vic dibromide (D) Two sec. dibromo alkane H NOMENCLATURE OF ORGANIC COMPOUND 24. What is the correct IUPAC name for the following compound ? CH3 CH3(CH2 )4CH C CH2CH2CH3 CH3 CH2 CH3 (A) 3, 4-Dimethyl-3-propyl nonane (C) 6, 7-Dimethyl-7-ethyl decane 25. (B) 6, 7-Dimethyl-2-propyl nonane (D) 4-Ethyl-4, 5-dimethyl decane The IUPAC name for (A) 3-methyl-2-pentene-4-yne (C) 3-methyl-4-pentyne-1-ene 26. (B) 3-Methyl-3-pentene-1-yne (D) 3-Methyl pentenyne The IUPAC name of the compound Glycerine CH2 CH CH2 OH (A) 1, 2, 3-Tri hydroxy propane (C) 1, 2, 3-Hydroxy propane 27. 28. 29. 30. OH OH (B) 3-Hydroxy pentane-1, 5-diol (D) Propane-1,2,3-triol Which of the following is crotonic acid : (A) CH2 = CH – COOH (B) C6H5 – CH = CH–COOH (C) CH3 – CH = CHCOOH (D) CH COOH CH COOH In which of the following species a carbon has sp-hybridization : (A) CH3COOH (B) CH3COCH3 (C) CH3 – CH2 – CN All the following IUPAC name are correct except : (A) 1-Chloro-1-ethoxy propane (C) 1-Ethoxy-2-propanol (D) (B) 1-Amino-1-ethoxypropane (D) 1-Ethoxy-1-propanamine Number of 3° carbon and 1° hydrogen respectively in the following structure are : Me Me Me H H C C C C Me Me H Me Me (A) 3, 21 31. (C) 2, 18 (D) 3, 18 Which of the following are tertiary radicals :  (A) (CH3 )3 C 32. (B) 3, 23  (B) (CH3 ) 2 CH  (C) (CH 3 )2 C  C 2 H 5 The correct IUPAC name for the given structure is : CH3 CH3 CH CH2 CH CH2 CH3 H3C CH CH3 (A) 3-Isopropyl-4-methylhexane (C) 3-Ethyl-2, 5-dimethylhexane  (D) (CH 3 )3 C  CH 2 (B) 4-Isoprpyl-3-methylhexane (D) 2-Ethyl-3-isopropylpentane Et Me 33. The IUPAC name of is : (A) 2, 3-Dimethyl hexane (C) 3-Ethyl-2-methyl pentane (B) 2-Ethyl-4-methyl pentane (D) 2, 4-Dimethyl hexane Ph 34. The IUPAC name of the compound is CH3 CH CH NH2 CH3 (A) 1-Amino-1-phenyl-2-methyl propane (C) 2-Methyl-1-amino-1-phenyl propane (B) 2-Methyl-1-phenyl propane-1-amine (D) 2-Chloro-2-Methylpropane 35. The IUPAC name of the compound Br (Cl) CH.CF3 is : (A) haloethane (B) 1, 1, 1-triflouro-2-bromo-2-chloroethane (C) 2-bromo-2-chloro-1, 1, 1-triflouroethane (D) 1-bromo-1-chloro-2, 2, 2-triflouro ethane 36. IUPAC name of compound is CH3 CH CH2 CH(OH) CH3 CH2CH3 (A) 4-methyl-3-hexanol 37. 38. (B) heptanol The IUPAC name of tert-butyl chloride is : (A) 4-Chlorobutane (C) 3-Ethyl-2-methyl pentane The IUPAC name of CH3CH2 41. 42. (B) 2-Ethyl-2-methyl pentane (D) 2-Chloro-2-Methyl propane (B) 3-ethyl-4-methyl hexane (D) None of these The correct nomenclature (IUPAC) for the following alcohol is : CH3CH2 40. (D) none of these is – (A) 4-ethyl-3-methyl hexane (C) 3-methyl-4-ethyl hexane 39. (C) 4-methyl-2-hexanol C CH2CH3 OH (A) 2-Ethyl-2-butanon (C) 3-Ethyl pentan-3-ol (B) 1-Ethyl-1-methyl-pentanol-1 (D) diethyl ethanol The IUPAC name of is : (A) 1, 1-diethyl-2, 2-dimethyl pentane (C) 5, 5-diethyl-4, 4-dimethylpentane (B) 4, 4-dimethyl-5, 5-diethylpentane (D) 3-ethyl-4, 4-dimethylheptane Underline carbon is sp3 hybridised in : (A) CH3– CH = CH2 (C) CH3CONH2 (B) CH3CH2 – NH2 (D) CH3CHCN The IUPAC name of (A) 2-ethyl-3-methyl-1-penten-4-yne (C) 4-ethyl-3-methyl-1-pentyn-4-ene is – (B) 2-ethyl-3methyl-4-pentyn-1-ene (D) 4-ethyl-3-ethyl-4penten-1-yne NOMENCLATURE OF ORGANIC COMPOUND 43. The correct IUPAC name of : CH3 CH2 CH CH2COCl CH3 (A) 3-methyl pentanoyl chloride (C) 1-chloro-3-ethyl butanone 44. (B) 3-methyl butanoyl chloride (D) 1-chloro-3-methyl pentanone The correct IUPAC name of CH3 CH2 C COOH CH2 (A) 2-methyl butanoic acid (C) 2-carboxy-1- butene 45. (B) 2-ethyl-2-propenoic acid (D) None of these IUPAC name will be CH2 CH CH 2 CN CN CN (A) 1, 2, 3-Tricyano propane (C) 1, 2, 3-Cyano propane (B) Propane-1,2,3-trinitrile (D) Propane-1, 2, 3-tricarbonitrile O 46. CH2 C OH OH The IUPAC name of compound C COOH CH2 COOH (A) 1, 2, 3-Tricarboxypropan-2-ol (B) 2-Hydroxy propane-1, 2, 3-tricarboxylic acid (C) 3-Hydroxy-3-carboxypentane-1, 5-dioic acid (D) None 47. The IUPAC name of the structure is : H2N CH CH CHO HOOC COOH (A) 3-Amino-2-formyl butane-1, 4-dioic acid (C) 2-Amino-3-formyl butane-1, 4-dioic acid 48. (B) 3-Amino-2, 3-dicarboxy propanal (D) 1-Amino-2-formyl succinic acid Which of the following compound is wrongly named ? Column I Column II (A) CH3CH2 CH2CHCOOH Cl 2-Chloro pentanoic acid (B) 2-Methyl hex-3-enoic acid (C) CH3CH2CH = CHCOCH3 Hex -3- en - 2- one (D) CH3 CHCH2CH2CHO 4-Methyl pentanal CH3 NH2 49. COOH The IUPAC name of is – (A) 1-amino-2-carboxybenzene (C) 1-amino-2-benzenecaroxylic acid 50. (B) 2-amino-1-carboxy benzene (D) 2-aminobenzenecarboxylic acid Which name is correct : OHC CH3 CH3 CH3 (A) Spiro(3,6) decane (B) 3, 7-Dimethyloct-2, 6-dienal I (C) 51. Et 3-Ethyl-7-iodobicyclo (2.2.1) heptane (D) N N-Methyl-Ethylethanamine The IUPAC name of the following compound is : CHO Br OH (A) 5-Bromo-3-hyddroxybenzenecarbaldehyde (C) 3-Bromo-5-hydroxybenzenecarbaldehyde 52. (B) 3-Bromo-5-formylphenol (D) 1-Bromo-3-formyl-5-hydroxybenzene The IUPAC name of the compound is : COOH CN CHO (A) 2-Cyano-1-fromylbenzene-4-carboxylic acid (C) 4-Careboxy-2-cyanobenzene-1-carbaldehyde (B) 3-Cyano-4-formylbenzene-1-carboxylic acid (D) 2-Formyl-5-carboxybenzene-1-carbonitrile O 53. IUPAC name of Cl C O (A) 4-Chlorophenyl benzoate, (C) Benzyl-4-chlorobenzenecarboxylate (B) Phenyl-4-Chlorobenzenecarboxylate. (D) 4-Chloro diphenylcarboxylate. NOMENCLATURE OF ORGANIC COMPOUND 54. The correct IUPAC name of the compound. NH-CHO Cl (A) N-Formyl-4-chlorobenzenamine (B) N-Formyl-4-chloroaniline (C) N-(4-chlolrophenyl)methanamide (D) N-(Parachlorophenyl)–N-Formylaniline COOC2H5 55. IUPAC name of the compound is COCl (A) 2-Chlorocarbonyl ethylbenzenecarboxylate (B) 2-Carboxyethylbenzoyl chloride (C) Ethyl 2-(chlorocarbonyl)benzenecarboxylate (D) Ethyl 1-(chlorocarbonyl)benzenecarboxylate 56. The correct IUPAC name of the compound COOH C O O (A) 2-Phenoxycarbonylbenzenecarboxylic acid (B) Phenyl-2-carboxybenzenecarboxylate (C) 2-Benzoyloxybenzenecarboxylic acid (D) 2-Bezyloxycarbonylbenzenecarboxylic acid EXERCISE - 1 1. 14. 27. 40. 53. A A C D B 2. 15. 28. 41. 54. C A C B C 3. 16. 29. 42. 55. C B B A C 4. 17. 30. 43. 56. B D A A A 5. 18. 31. 44. C C C B 6. 19. 32. 45. D B C D 7. 20. 33. 46. B D D B 8. 21. 34. 47. C B B C 9. 22. 35. 48. D B C B 10. 23. 36. 49. B A C D 11. 24. 37. 50. A D D B 12. 25. 38. 51. B B B C 13. 26. 39. 52. B D C B