Chapter One Topi c: Introduction to Organic Chemistry Section: 1.1 Difficulty Level: Easy 1. Chemical reactions occur as a result of: A) Attraction between opposite charges B) Nucleus –Nucleus interactions C) Motion of electrons D) Like atoms inter acting E) Combining two chemicals Ans: C Topi c: Introduction to Organic Chemistry Section: 1.1 Difficulty Level: Easy 2. Credit for the first synthesis of an organic compound from an inorganic precursor is generally ascribed to: A) Berzelius B) Arrhenius C) Kekulé D) Wöhler E) Lewis Ans: D Topi c: Introduction to Organic Chemistry Section: 1.1 Difficulty Level: Easy 3. What was long thought to be the difference between inorganic and organic compounds? A) The number of atoms B) The synthes is of organic compounds required a vital force C) The molecular weight D) Inorganic compounds exhibited a strong nuclear force E) Inorganic compounds were composed exclusively of transition metals Ans: B Topi c: The Structural Theory of Matter Sectio n: 1.2 Difficulty Level: Easy 4. Constitutional isomers may not differ in what aspects? A) Physical properties B) Atomic connectivity C) Molecular formula D) Name E) Constitution Ans: C Topi c: The Structural Theory of Matter Section: 1.2 Difficu lty Level: Easy 5. What is the relationship between the following compounds ? HCC
HHCH
CCH
HH HCH
HCO
C
CCH
HHO
H H
H A) They are isotopes B) They are constitutional isomers C) They are the same structure D) They are composed of different elements E) Ther e is no relationship Ans: B Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Easy 6. What is the relationship between the following compounds? C C O CH
HHH
HH
HH C C C OH
HHH
H HH
H A) Resonance isomers B) Constitutional isomers C) Empirical isomers D) There is no relationship Ans: B Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Easy 7. Carbon generally forms four bonds and is considered: A) Tetravalent B) Divalent C) Trivalent D) Monovalent E) Qudravalent Ans: A Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 8. Which of the following compounds are constitutional isomers of each other ? C
C
CCCCBr
C Cl
C
HHH
H HHH H
C
C
CCCCC
Cl
H
HHBrC
HH
H
H
H
C
C
CCCCC
C
H
ClBrHH
H
H
HH
H
C
C
CCCCBr
C
H
ClBrC
HH
H
HH
H
III IIIIV A) I & II B) III & IV C) I, II & III D) II, III & IV E) All of these Ans: E Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 9. Which of the following compounds are constitutional isomers of each other ? I II III IVC C ClCl
HHH
ClC C ClCl
HClH
ClC C ClCl
HHH
HC C ClH
HHCl
Cl A) I & II B) III & IV C) II & III D) I & IV E) All of these Ans: D Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 10. Which of the following compounds are constitutional isomers of each other? CNC H
HO
HH
CH
HC
HH
HC
CCONCHH
H
HHH
HH
HHCH
C
HH
HCO
N
HCH
HHC
CNC
COH
H
H
HH
HH IIIIII IV A) I & II B) III & IV C) I, II & III D) I & IV E) All of these Ans: C Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 11. Draw three constitutional isomers that have molecular formula C 4H8BrCl Ans: C C C CH
HHH
H HBr H
HCl C C C CH
HHCl
H HBr H
HH C C C CH
HHH
H ClBr H
HH There are additional correct answers. Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Hard 12. Draw three constitutional isomers that have molecular formula C 4H8O. Ans: C C C C
HH
H HH H
HO C C C CH
HHH
H HH O
H H C C C O
HH
H HH
C H
HH There are addi tional correct answers Topic: Electrons, bonds, and Lewis structure s Section: 1.3 Difficulty Level: Easy
HHCH
CCH
HH HCH
HCO
C
CCH
HHO
H H
H A) They are isotopes B) They are constitutional isomers C) They are the same structure D) They are composed of different elements E) Ther e is no relationship Ans: B Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Easy 6. What is the relationship between the following compounds? C C O CH
HHH
HH
HH C C C OH
HHH
H HH
H A) Resonance isomers B) Constitutional isomers C) Empirical isomers D) There is no relationship Ans: B Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Easy 7. Carbon generally forms four bonds and is considered: A) Tetravalent B) Divalent C) Trivalent D) Monovalent E) Qudravalent Ans: A Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 8. Which of the following compounds are constitutional isomers of each other ? C
C
CCCCBr
C Cl
C
HHH
H HHH H
C
C
CCCCC
Cl
H
HHBrC
HH
H
H
H
C
C
CCCCC
C
H
ClBrHH
H
H
HH
H
C
C
CCCCBr
C
H
ClBrC
HH
H
HH
H
III IIIIV A) I & II B) III & IV C) I, II & III D) II, III & IV E) All of these Ans: E Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 9. Which of the following compounds are constitutional isomers of each other ? I II III IVC C ClCl
HHH
ClC C ClCl
HClH
ClC C ClCl
HHH
HC C ClH
HHCl
Cl A) I & II B) III & IV C) II & III D) I & IV E) All of these Ans: D Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 10. Which of the following compounds are constitutional isomers of each other? CNC H
HO
HH
CH
HC
HH
HC
CCONCHH
H
HHH
HH
HHCH
C
HH
HCO
N
HCH
HHC
CNC
COH
H
H
HH
HH IIIIII IV A) I & II B) III & IV C) I, II & III D) I & IV E) All of these Ans: C Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Medium 11. Draw three constitutional isomers that have molecular formula C 4H8BrCl Ans: C C C CH
HHH
H HBr H
HCl C C C CH
HHCl
H HBr H
HH C C C CH
HHH
H ClBr H
HH There are additional correct answers. Topi c: The Structural Theory of Matter Section: 1.2 Difficulty Level: Hard 12. Draw three constitutional isomers that have molecular formula C 4H8O. Ans: C C C C
HH
H HH H
HO C C C CH
HHH
H HH O
H H C C C O
HH
H HH
C H
HH There are addi tional correct answers Topic: Electrons, bonds, and Lewis structure s Section: 1.3 Difficulty Level: Easy
