(Test Bank) Introduction to Organic Chemistry

Brown, 1

Chemistry

Test Bank

1st Edition

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Test Bank for Introduction to Organic Chemistry, The downloadable file consists of 557 pages, and the total size of the file is 5.43 MB. Purchase now only for highly discounted price.

Author(s): Brown

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Test Bank for Brown's Introduction to Organic Chemistry, 1e (Global Edition), William Brown (All Chapters ) Chapter 1 - Covalent Bonding and Shapes of Molecules 1 Package Title: Brown/Poon Test Bank Course Title: Brown/Poon, Global Edition Chapter Number: 1 Question type: Multiple Choice Section 1.1 Difficulty Level: Easy 1. Which is the electronic configuration that describes Mg2+? a) 1s2, 2s2 b) 1s2, 2s2, 2p6 c) 1s2, 2s2, 2p6, 3s2 d) 1s2, 2s2, 2p6, 3s2, 3p6 Answer: b Section 1.1 Difficulty Level: Easy 2. Which is the electronic configuration that describes a neutral carbon atom? a) 1s2, 2s2, 2p5 b) 1s2, 2s2, 2p6, 3s2 c) 1s2, 2s2, 2p2 d) 1s2, 2s2, 2p6 Answer: c Section 1.1 Difficulty Level: Easy 3. Which atom is described by the electronic configuration 1s22s22p63s23p3? a) Mg b) Al c) Si d) P Answer: d Section 1.1 Difficulty Level: Easy 4. Which atom is described by the electron configuration 1s22s22p63s23p5? a) S b) Se c) Cl d) Br Answer: c Chapter 1 - Covalent Bonding and Shapes of Molecules 2 Section 1.1 Difficulty Level: Easy 5. A neutral c arbon has how many valence electrons? a) 2 b) 4 c) 6 d) 8 Answer: b Section 1.1 Difficulty Level: Easy 6. A neutral o xygen has how many valence electrons? a) 4 b) 5 c) 6 d) 7 Answer: c Section 1.1 Difficulty Level: Easy 7. A neutral n itrogen has how many valence electrons? a) 4 b) 5 c) 6 d) 7 Answer: b Section 1.1 Difficulty Level: Medium 8. Which statement about orbitals is false? a) Orbitals are regions of space where electrons are found. b) Orbitals may contain up to two electrons each. c) Orbitals are filled in order of decreasing energy. d) Orbitals of equivalent energy are half filled before adding two electrons to any one of them. Answer: c Chapter 1 - Covalent Bonding and Shapes of Molecules 3 Section 1.2 Difficulty Level: Easy 9. Which atom is described by the Lewis structure A ? a) C b) P c) Se d) I Answer: c Section 1.2 Difficulty Level: Easy 10. Which atom is described by the Lewis structure A ? a) C b) P c) Se d) I Answer: a Section 1.2 Difficulty Level: Medium 11. Which Lewis structure s are correct? HINT : Perform a total valence count and check formal charges. a) I b) II c) III d) IV Answer : a H CH OH HCCH HH H OOH HO CO OH H I II III IVChapter 1 - Covalent Bonding and Shapes of Molecules 4 Section s 1.2, 1.7 Difficulty Level: Medium 12. Which Lewis structures are correct? HINT: Perform a total valence count and check formal charges. a) I, II b) II, IV c) III, IV d) I, III Answer: c Section 1.2 Difficulty Level: Medium 13. Which functional groups have correct Lewis structures? a) I, II b) II, III c) I, II, III d) I, III Answer: d CH3 C CH3 CH3OH CO CH3CH3 CH3CO OH I II IIIChapter 1 - Covalent Bonding and Shapes of Molecules 5 Section 1.2 Difficulty Level: Hard 14. Which is the correct Lewis structure for acetic acid (CH 3CO 2H)? a) I b) II c) III d) IV Answer: d Section 1.3 Difficulty Level: Medium 15. Using the VSEPR model, predict which atoms have bond angles of about 120°. a) II, IV b) I, IV c) II, III d) I, III Answer: d CCO HHHOH H CH HCO O HH CH HOCO HHOCO CH H H I II III IV O C H CH3CH3OH CH2CH2 NH4Cl I II III IVChapter 1 - Covalent Bonding and Shapes of Molecules 6 Section 1.3 Difficulty Level: Medium 16. Using the VSEPR model, predict which species have bond angles of about 109°. HINT : Assume that the charges are correct. Add the missing lone pairs before applying the VSEPR theory! a) I, III, IV b) II, III, V c) I, IV d) III, IV, V Answer: a Section 1.3 Difficulty Level: Medium 17: Which of the atoms that are marked with an arrow have tetrahedral geometry? a) I, II b) II, IV c) I, IV, V d) II, II, V Answer: b O C H CH3CH3OHO C CH3 CH3NCH3 CH3H CO OH CH3 I III II IV V NH3 CO2 H2O H3O+O3 I II III IV VChapter 1 - Covalent Bonding and Shapes of Molecules 7 Section s 1.3, 1.5 Difficulty Level: Medium 18: Which of the atoms that are marked with an arrow are sp2-hybridized? a) I, II, III b) I, II, IV c) I, III, V d) III, IV Answer: c Section 1.3 Difficulty Level: Hard 19. According to VSEPR model, what is your prediction for the arrangement of electron pairs for CH 3-? a) linear b) tetrahedral c) bent d) trigonal Answer: b Section 1.4 Difficulty Level: Easy 20. Arrange the bonds in increasing order of ionic character (least first). C-C Na-O C-N O-H C-O I II III IV V a) III, I, IV, II, V b) V, III, I, II, IV c) I, V, III, IV, II d) I, III, V, IV, II Answer: d O C H CH3H3COHO C CH3 CH3NCH3 CH3H CO OH CH3 I III II IV VChapter 1 - Covalent Bonding and Shapes of Molecules 8 Section 1.4 Difficulty Level: Easy 21. Nitr ogen has a negative formal charge in which of the following compounds? a) NaNH 2 b) N 2 c) NH 4Cl d) HCN Answer: a Section 1.4 Difficulty Level: Easy 22. What is the formal charge of oxygen in H 3O+? a) –1 b) 0 c) +1 d) +2 Answer: c Section 1.4 Difficulty Level: Medium 23. Which compounds contain both covalent and ionic bonds? CH 3OH Na2CO 3 NH 4Cl NaCl I II III IV a) I, II b) II, IV c) I, II, IV d) II, III Answer: d Section 1.4 Difficulty Level: Medium 24. Which of these molecules are polar? HINT : look for the presence of at least one polar covalent bond in these molecules! a) I,IV b) I, III, III c) II, III, IV d) III, IV, V Answer: b V IV III II IBr2 H2O CO2NH3 CH4Chapter 1 - Covalent Bonding and Shapes of Molecules 9 Section 1.4 Difficulty Level: Medium 25. Which of these molecules are polar? HINT: look for the presence of at least one polar covalent bond in these molecules! a) III, IV, V b) I, IV c) II, III, V d) I, III Answer: c Section 1.4 Difficulty Level: Medium 26. What is the formal charge of indicated carbon in the following molecule? a) –2 b) –1 c) 0 d) +1 Answer: b CH2CH2CO H H CH3CH3CH2Cl2 CH3OH I III II IV V CH3CO HChapter 1 - Covalent Bonding and Shapes of Molecules 10 Section 1.4 Difficulty Level: Hard 27. Using the VSEPR model, predict which molecules have bond angles of about 109°. a) II, IV b) I, II, III c) III, IV, V d) II, III, IV Answer: c Section 1.4 Difficulty Level: Hard 28. Using the VSEPR model, predict which molecules have bond angles of about 120°. a) I, II, IV b) I, II, III c) III, IV, V d) II, III, IV Answer: b Section 1.5 Difficulty Level: Medium 29. Which statement about contributing structures is false? a) All contributing structures must have the same number of valence electrons. b) All contributing structures must obey the rules of covalent bonding. c) The position of nuclei may change. d) Third period atoms may have up to 18 electrons around them. Answer: c CH2CH2 CH2O NCO CH3F C Cl F ClHOCCH3 CH3CH3 I II III IV V CH2CH2 CH2O NCO CH3F C Cl F ClHOCCH3 CH3CH3 I II III IV VChapter 1 - Covalent Bonding and Shapes of Molecules 11 Section 1.5 Difficulty Level: Hard 30. Which of the following are pairs of contributing structures? a) II, IV b) I, II, III c) III, IV d) II, III, ,IV Answer: c Section 1.6 Difficulty Level: Medium 31. The carbon has the correct orbital hybridization in which structures? a) II, IV, V b) II, III, IV c) I, II, III d) I, IV, V Answer: a Section 1.6 CH3O CH3 CH3CH2 OH CH2OCH2O CH2CHCH2CH2 CH CH2 NCONCOI II III IV CH2O CH2CH2 CHN OCO CH4 sp sp2sp2sp sp I II III IV VChapter 1 - Covalent Bonding and Shapes of Molecules 12 Difficulty Level: Medium 32. What are the correct orbital hybridizations for carbon in the following species? HINT : Add a lone pair if the charge of the molecule suggests it! a) CH 3+ is sp-hybridized b) CH 3- is sp2-hybridized c) CH 4 is sp2-hybridized d) CH 3- is sp3-hybridized Answer: d Section 1.7 Difficulty Level: Easy 33. Which of the following compounds is a tertiary (3°) alcohol? I II III IV a) I b) II c) III d) IV Answer: b Section 1.7 CH3 CH4 CH3 CHOH CH3CH3 COH CH3CH3 CH3 CCH2 CH3CH3 CH3OH CHCH CH3CH3 OH CH3Chapter 1 - Covalent Bonding and Shapes of Molecules 13 Difficulty Level: Medium 34. Which compounds are classified correctly? HINT : Assume that the charges are correct. Add the missing lone pairs! a) III, IV, V b) II, III, IV c) I, III, V d) I, III, IV Answer: a Section 1.7 Difficulty Level: Medium 35. Which of the three molecules (testosterone, methadone and hydrocodone ) contains a ketone? a) I,II b) III c) II,III d) I, II, III Answer: d CO H CH3CH3OHO C CH3 CH3NCH3 CH3HO C OH CH3 I II III IV Valcohol aldehyde ketone amine carboxylic acid OOH HH Htestosterone ON ON O Ohydrocodone methadone I II IIIChapter 1 - Covalent Bonding and Shapes of Molecules 14 Section 1.7 Difficulty Level: Medium 36. Which of the three molecules testosterone, methadone and hydrocodone contains an amine? a) I,II b) III c) II,III d) I, II, III Answer: c Section 1.7 Difficulty Level: Medium 37. Which of the three molecules testosterone, methadone and hydrocodone contains a hydroxyl group. a) I b) I, III c) II,III d) I, II, III Answer: a Section 1.7 Difficulty Level: Medium OOH HH Htestosterone ON ON O Ohydrocodone methadone I II III OOH HH Htestosterone ON ON O Ohydrocodone methadone I II III