Title Neet proof reading chapter -3 ✅

3.1 GENERAL INTRODUCTION : (CLASSIFICATION, NOMENCLATURE AND NATURE OF C— X BOND) 1. Cl—C—Cl bond angle in 1,1,2,2-tetrachloro ethene and tetrachloromethane is: (a) 120 and 109.5 (b) 90 and 109.5 (c) 109.5 and 90 (d) 109.5 and 120 2. Which of the following is tertiary alkyl halide ? (a) 2-Chloro-2-methyl butane (b) 1-Chloropropane (c) 2-Chloropropane (d) Cyclohexyl chloride 3. Select the incorrectly matched : (a) Thyroxine-Goitre (b) Chloramphenicol-Typhoid (c) Chloroquine-malaria (d) Fluorohydrocarbons-Boneglue 4. Which of the following is an example of vic-dihalide ? (a) Dichloromethane (b) 1,2-dichloroethane (c) Ethylidene chloride (d) Allyl chloride 5. Which is the correct IUPAC name for ? (a) 1-Bromo-2-ethylpropane (b) 1-Bromo-2-ethyl-2-methylethane (c) 1-Bromo-2-methylpropane (d) 2-Methyl-1-bromobutane 6. What should be the correct IUPAC name for diethylbromomethane ? (a) 1-Bromo-1,1-diethylmethane (b) 3-Bromopentane (c) 1-Bromo-1-ethylpropane (d) 1-Bromopentane 7. The position of —Br in the compound in CH3CH CHC Br CH3 2 ( )( ) can be classified as ................ . (a) Allyl (b) Aryl (c) Vinyl (d) Secondary 8. Ethylidene chloride is a/an .................. . (a) vic-dihalide (b) gem-dihalide (c) allylic halide (d) vinylic halide Haloalkanes and Haloarenes 277 Level-1 CH3 H C3 Br Haloalkanes and Haloarenes 3
9. Which of the following compounds are primary haloalkanes ? (I) CH C H I C CH CH H 3 3 3 — | | — — | | (II) CH C Cl CH CH 3 3 3 — — | | (III) CH CH CBr 3 — 2 — 3 (IV) CFH CH CH CH CH 2 2 3 3 — — | | (a) I, II (b) III, IV (c) II, III (d) I, IV 10. The carbon atom to which the halogen is attached can be : (a) sp 2 -hybridized (b) sp 3 -hybridized (c) sp hybridized (d) both (a) and (b) 11. Which of the the following structures have correct common names ? (I) CH2 CH — CH2 — F Allyl fluoride (II) CH CH CH CH Br 3 3 2 — Isobutyl bromide (III) CHCl 3 Methylene chloride (IV) CH CH I 3 — CH2 CH3 | — — Isopropyl iodide (a) I, II (b) III, IV (c) I, III (d) II, IV 3.2 METHODS OF PREPARATION : HALOALKANES 12. Alkyl halide can be prepared from : (a) alkene (b) alcohol (c) carboxylic acid (d) all of these 13. The reaction of SOCl 2 on alkanols to form alkyl chlorides gives good yields because: (a) alkyl chlorides are immiscible with SOCl 2 (b) the other products of the reaction are gaseous and escape out (c) alcohol and SOCl 2 are soluble in water (d) the reaction does not occurs via intermediate formation of an alkyl chloro sulphite 14. CH3CH2COOH I Pb(OAc) 2 4 / [ ] hv P ; Product [P] is : (a) CH CH C O 3 2 OCH2CH3 (b) CH CH C O 3 2 OCH3 (c) CH CH I 3 2 (d) CH C O 3 OCH2CH3 278 Elementary Organic Chemistry for Medical

22. What is ‘ A’ in the following reaction ? A (a) (b) (c) (d) 23. The reaction of toluene with chlorine in the presence of iron and in the absence of light yields ........ . (a) (b) (c) (d) Mixture of (b) and (c) 24. The synthesis of alkyl fluorides is best accomplished by : (a) Sandmeyer’s reaction (b) Finkelstein reaction (c) Swarts reaction (d) Free radical fluorination 3.3 PHYSICAL PROPERTIES 25. Arrange the following compounds in the increasing order of their densities : (I) (II) (III) (IV) (a) (I) (II) (III) (IV) (b) (I) (III) (IV) (II) (c) (IV) (III) (II) (I) (d) (II) (IV) (III) (I) 26. Arrange the following compounds in increasing order of their boiling points : (I) CH CH H CH Br 3 3 2 C — (II) CH CH CH CH Br 3 2 2 2 (III)H C C CH Br CH 3 3 3 — — | | (a) (II) (I) (III) (b) (I) (II) (III) (c) (III) (I) (II) (d) (III) (II) (I) 27. Which of the following is liquid at room temperature ? (a) CH3 I (b) CH3Br (c) C H Cl 2 5 (d) CH3F 280 Elementary Organic Chemistry for Medical CH2—CH—CH3 Cl CH—CH2 — CH3 Cl CH Cl 2 CH3 Cl H C3 Cl Cl Cl Cl Br Cl CH2—CH == CH2 Cl CH —CH —CH —Cl 2 2 2 + HCl → CH2—CH == CH2