Orgo Chapter 1 Test Bank Revision Questions with Correct Answers
1) Which of the following best describes the origin of carbon atoms? - correct answers c) byproduct of
chemical fusion in stars
3) The greatest degree of ionic character is anticipated for the bond between - correct answers b) H and
Cl.
5) Select the most electronegative element from the list below. - correct answers b) O
6) Which of these substances contain both covalent and ionic bonds? - correct answers a) NH4Cl
9) In which of the following does the central atom have 2 pairs of non-bonding electrons? - correct
answers e) H2S
11) Which of these is a correct electron-dot representation of the nitrite ion, NO2-? - correct answers a)
I
13) Considering Lewis structures, which of these compounds possesses a single unpaired electron? -
correct answers c) NO
15) Expansion of the valence shell to accommodate more than eight electrons is possible with ___. -
correct answers d) sulfur
16) What is the formal charge on oxygen in the following structure? - correct answers b) +1
19) Which structure(s) contain(s) an oxygen that bears a formal charge of +1? - correct answers b) III and
IV
21) Which of the following molecules or ions has a nitrogen with a formal charge of -1? - correct answers
A
, 23) Which of the following is an ion with a negative one charge? - correct answers d) All of these
choices.
25) Listed below are electron dot formulas for several simple molecules and ions. All valence electrons
are shown; however, electrical charges have been omitted deliberately.
Which of the structures actually bear(s) a positive charge? - correct answerse) IV and V
26) Listed below are electron dot formulas for several simple molecules and ions. All valence electrons
are shown; however, electrical charges have been omitted deliberately.
Which of the structures is negatively charged? - correct answersb) II
29) Which compound contains a nitrogen atom with a formal positive charge? - correct answersd) More
than one of these choices.
31) CH3CH2OCH2CH3 and CH3CH2CH2CH2OH are examples of what are now termed: - correct
answerse) Constitutional isomers
33) Which compound is not a constitutional isomer of the others? - correct answersd) IV
35) Which of the following represent a pair of constitutional isomers? - correct answerse) More than
one of these choices.
36) Which of the following represent pairs of constitutional isomers? - correct answerse) All of these
pairs.
39) Which compound is not a constitutional isomer of the others? - correct answersc) III
41) Which of the following pairs are NOT resonance structures? - correct answersC
1) Which of the following best describes the origin of carbon atoms? - correct answers c) byproduct of
chemical fusion in stars
3) The greatest degree of ionic character is anticipated for the bond between - correct answers b) H and
Cl.
5) Select the most electronegative element from the list below. - correct answers b) O
6) Which of these substances contain both covalent and ionic bonds? - correct answers a) NH4Cl
9) In which of the following does the central atom have 2 pairs of non-bonding electrons? - correct
answers e) H2S
11) Which of these is a correct electron-dot representation of the nitrite ion, NO2-? - correct answers a)
I
13) Considering Lewis structures, which of these compounds possesses a single unpaired electron? -
correct answers c) NO
15) Expansion of the valence shell to accommodate more than eight electrons is possible with ___. -
correct answers d) sulfur
16) What is the formal charge on oxygen in the following structure? - correct answers b) +1
19) Which structure(s) contain(s) an oxygen that bears a formal charge of +1? - correct answers b) III and
IV
21) Which of the following molecules or ions has a nitrogen with a formal charge of -1? - correct answers
A
, 23) Which of the following is an ion with a negative one charge? - correct answers d) All of these
choices.
25) Listed below are electron dot formulas for several simple molecules and ions. All valence electrons
are shown; however, electrical charges have been omitted deliberately.
Which of the structures actually bear(s) a positive charge? - correct answerse) IV and V
26) Listed below are electron dot formulas for several simple molecules and ions. All valence electrons
are shown; however, electrical charges have been omitted deliberately.
Which of the structures is negatively charged? - correct answersb) II
29) Which compound contains a nitrogen atom with a formal positive charge? - correct answersd) More
than one of these choices.
31) CH3CH2OCH2CH3 and CH3CH2CH2CH2OH are examples of what are now termed: - correct
answerse) Constitutional isomers
33) Which compound is not a constitutional isomer of the others? - correct answersd) IV
35) Which of the following represent a pair of constitutional isomers? - correct answerse) More than
one of these choices.
36) Which of the following represent pairs of constitutional isomers? - correct answerse) All of these
pairs.
39) Which compound is not a constitutional isomer of the others? - correct answersc) III
41) Which of the following pairs are NOT resonance structures? - correct answersC
