A. two B. four C. six D. eight 15. Which one of the following compounds has highest boiling point? I. CH3CH2CH3 II....
A. two B.four 15. Which one of the following compounds has highest boiling point? 1. CH3CH2CH3 II. CH3CH2OH III. CH3OCH3 C. six D. eight AI B. II CINI 16. What occurs when an optically active alcohol reacts with HBr to give an alkyl halide? A. complete inversion of configuration takes place at the chirality center B. incomplete and varying inversion of configuration takes place at the chirality center C. the chirality center retains its configuration D. the molecule loses its...
A. aldehyde A. two 15. W B. ketones C. carboxylic acids D. esters 7. How many stereoisomers of 24-pentanediol are possible? HO D. 6 A. 2 B.3 C. 4 8. Which one of the following is a diastereomer of 2R 3R)-2,3-dibromopentane? B. (25,3R)-2,3-dibromopentane D. (2R, 4R)-2,4-dibromopentane A. (2S,3S)-2,3-dibromopentane C. R-1,2-dibromopentane y. Which one of the following groups has the highest rank as assigned by the Cahn-Ingold Prelog system for stereogenic carbons? A. -CH=CH2 B. -CH2OH C. -CH=0 D.-CH2SH 10. Which...
29 Give the configurations, respectively, of the following two molecules. CH HO H and CI A. B. C. R and R R and S S and S D. S and R 30 Give the configurations, reypectively, of the folowing two molecules H CH CHy A. B. C. R and R R and S Sand S D. S and R Which one of the following groups has the highest rank as assigned by the Cahn- Ingold-Prelog system for stereogenic (chiral) carbons?...
Rank these compounds in terms of acid strength from strongest to weakest. on oma A) I>II> IV > III B) >> I > IV C) > I >> IV D) > >IV> Vhich compound is the best substrate for an S2 reaction? Which compound is meso? A) (2,3R)-2,3-Dibromobutane B) (2,35)-2,3-Dibromopentane C) (2R, 4R)-2,4-Dibromopentane D) (2R.45)-2,4-Dibromopentane Which CHO isomer gives the following H NMR spectrum? y e her
A. aldehyde B. ketones C. carboxylic acids D. esters 7, How many stereoisomers of 2,4-pentanediol are possible? но он В. З A. 2 C. 4 D. 6 8.Which one of the following is a diastereomer of (2R, 3R)-2,3-dibromopentane? A. (2S,3S)-2,3-dibromopentane C.R-1,2-dibromopentane B. (2S,3R)-2,3-dibromopentane D. (2R,4R)-2,4-dibromopentane 9. Which one of the following groups has the highest rank as assigned by the Cahn-Ir Prelog system for stereogenic carbons? A. -CH-CH2 B. -CH20H C.-CH-0 D. -CH2SH 10. Which of the following statements are...
Consider the following electron configurations to answer the next two questions: (i) 1s22s22p@3s! (ii) 1s22s22p3s2 (iii) 1s22s22p3s23p1 (iv) 1s22s22p3s23p (v) 1s22s22p@3s23p5 39) The electron configuration belonging to the atom with the highest second ionization energy is A) (0) B) () C) (iii) D) (iv) E) (v) 40) The electron configuration that belongs to the atom with the lowest second ionization energy is A) (i) B)(ii) C) (iii) D) (iv) E) (v)
Which of the following compounds is least acidic? a. I b. II c. III d. IV e. V HBr HCI NH3 ?? IV
23. Which of the following correctly ranks the compounds below by ascending boiling point? I. CH3COCH II. KC III. Kr IV. CH:CH(OH)CH A. I<II<IV<III . . B. III <IV<I<II I . C. II<IV <I<III D. III <I<IV<II
23. Which of the following correctly ranks the compounds below by ascending boiling point? I. CH3COCH3 II. KC1 III. Kr IV. CH3CH(OH)CH3 A. I< II <IV <II B. III <IV <I<II C. II<IV <I< III D. III <I<IV < II
19. Which of the following molecules are achiral? A) II, III B) I, II C) I, IV D) III, IV 20. How many stereogenic centers are present in ephedrine, a bronchodilator and decongestant? ephedrine A) 0 B) 1 C) 2 D) 3 21. Rank the following groups in order of decreasing priority according to the Cahn-Ingold- Prelog system. -NH2 -NHCH3 -CH2NH2 CH2NHCH3 п V . A) B) I>II> III > IV II >I>IV > III II C II >I> III...