Question 1

What is the approximate value of the H-C-H bond angle in methane, CH4?

Accepted Answer

A)   90°
B)   109.5°
C)   120°
D)   180°E) C) and D)
F) All of the above B

Question 2

Avobenzone is an active ingredient in some common sunscreens. Which of the following is the correct molecular formula for avobenzone? 22O22O3 B)  C20H22O3 C)  C21H23O3 D)  C20H24O3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   C22O22O3
B)   C20H22O3
C)   C21H23O3
D)   C20H24O3E) A) and B)
F) B) and C)

Question 3

Which of the following statements about electronegativity and the periodic table is true?

Accepted Answer

A)   Electronegativity decreases across a row of the periodic table.
B)   Electronegativity increases down a column of the periodic table.
C)   Electronegativity increases across a row of the periodic table.
D)   Electronegativity does not change down a column of the periodic table.E) A) and D)
F) A) and C)

Question 4

Which of the following molecules has nonpolar covalent bonds?

Accepted Answer

A)   HCl
B)   N2
C)   CHCl3
D)   NOE) A) and B)
F) A) and C)

Question 5

What is the order of decreasing bond length for a C-C bond comprised of the following molecular orbitals?  sp3−sp3sp2−sp2sp−sp I  II  III \begin{array} { c c c } s p ^ { 3 } - s p ^ { 3 } & s p ^ { 2 } - s p ^ { 2 } & s p - s p \	ext { I } & 	ext { II } & 	ext { III }\end{array}sp3−sp3 I ​sp2−sp2 II ​sp−sp III ​

Accepted Answer

A)   I > III > II
B)   I > II > III
C)   III > II > I
D)   II > III > I E) B) and D)
F) None of the above

Question 6

Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethane, CH3CH3?

Accepted Answer

A)   Csp2 + H1s
B)   Csp3 + H1s
C)   C2p + H1s
D)   Csp + H1sE) None of the above
F) B) and D)

Question 7

Which of the following statements about constitutional isomers is true?

Accepted Answer

A)   Constitutional isomers are different molecules having different molecular formula.
B)   Constitutional isomers are different molecules having same molecular formula.
C)   Constitutional isomers are same molecules having different molecular formula.
D)   Constitutional isomers are same molecules having the same molecular formula.E) None of the above
F) All of the above

Question 8

What is the hybridization of the carbon atom in the methyl cation, (CH3+) ?

Accepted Answer

A)   sp3
B)   sp2
C)   sp
D)   pE) B) and C)
F) A) and B)

Question 9

What is the ground-state electronic configuration of a magnesium cation (Mg2+) ?

Accepted Answer

A)   1s2, 2s2, 2p6
B)   1s2, 2s2, 2p6, 3s1
C)   1s2, 2s2, 2p6, 3s2
D)   1s2, 2s2, 2p6, 3s2, 3p2E) A) and C)
F) B) and C) A

Question 10

Which of the following compounds has an atom with an unfilled valence shell of electrons?

Accepted Answer

A)   H2O
B)   BCl3
C)   CH4
D)   CO2E) A) and B)
F) C) and D)

Question 11

In which of the following ions does carbon have a formal charge?  [(CH3) 4 N]+\left[ \left( \mathrm { CH } _ { 3 } \right)  _ { 4 } \mathrm {~N} \right] ^ { + }\quad[(CH3​) 4​ N]+[CH3CO2]−\left[ \mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } \right] ^ { - }\quad[CH3​CO2​]−[CH3OH2]+\left[ \mathrm { CH } _ { 3 } \mathrm { OH } _ { 2 } \right] ^ { + }[CH3​OH2​]+ 
 \quad I \quad\quad\quad\quad\quad\quad\quad\quad II \quad\quad\quad\quad\quad III

Accepted Answer

A)   I
B)   II
C)   III
D)   None of the above E) B) and D)
F) B) and C)

Question 12

What is the approximate C-C-C bond angle in propene, CH3CH=CH2?

Accepted Answer

A)   90°
B)   109.5°
C)   120°
D)   180°E) B) and C)
F) A) and C)

Question 13

How many different isomers are there for a compound having the molecular formula C3H6O?

Accepted Answer

A)   4
B)   5
C)   6
D)   7E) B) and C)
F) All of the above

Question 14

Which of the following covalent bonds has the largest dipole moment?

Accepted Answer

A)   C-H
B)   C-C
C)   C-O
D)   H-FE) A) and B)
F) A) and C)

Question 15

Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethylene, H2C=CH2?

Accepted Answer

A)   C2p + H1s
B)   Csp + H1s
C)   Csp3 + H1s
D)   Csp2 + H1sE) A) and B)
F) A) and C)

Question 16

In which of the following ions does carbon have a formal charge?  CH3OH\mathrm { CH } _ { 3 } \mathrm { OH }\quadCH3​OHNaCH3\mathrm { NaCH } _ { 3 }\quadNaCH3​CH3CO2−\mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } -CH3​CO2​− 
I \quad\quad\quad\quad\quad II \quad\quad\quad\quad III

Accepted Answer

A)   I
B)   II
C)   III
D)   None of the above E) None of the above
F) A) and B)

Question 17

How many constitutional isomers are there for a molecule having the molecular C3H8O?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and D)
F) C) and D)

Question 18

Which of the following pair does not represent resonance structures?

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) B) and C)
F) A) and B)

Question 19

What is the hybridization for each of the indicated atoms in the following compound? 2; II = sp2; III = sp2. B)  I = sp2; II = sp3; III = sp3. C)  I = sp; II = sp2; III = sp3. D)  I = sp2; II = sp2; III = sp3." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   I = sp2; II = sp2; III = sp2.
B)   I = sp2; II = sp3; III = sp3.
C)   I = sp; II = sp2; III = sp3.
D)   I = sp2; II = sp2; III = sp3.E) A) and B)
F) A) and C) D

Question 20

Follow the curved arrows to draw the second resonance structure for the ion below.

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) A) and C)
F) All of the above

Exam 1: Structure and Bonding

What is the approximate value of the H-C-H bond angle in methane, CH₄?

Correct Answer
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B

Avobenzone is an active ingredient in some common sunscreens. Which of the following is the correct molecular formula for avobenzone?

Correct Answer
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Which of the following statements about electronegativity and the periodic table is true?

Correct Answer
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Which of the following molecules has nonpolar covalent bonds?

Correct Answer
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What is the order of decreasing bond length for a C-C bond comprised of the following molecular orbitals? $\begin{array} { c c c } s p ^ { 3 } - s p ^ { 3 } & s p ^ { 2 } - s p ^ { 2 } & s p - s p \\\text { I } & \text { II } & \text { III }\end{array}$

Correct Answer
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Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethane, CH₃CH₃?

Correct Answer
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Which of the following statements about constitutional isomers is true?

Correct Answer
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What is the hybridization of the carbon atom in the methyl cation, (CH₃⁺) ?

Correct Answer
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What is the ground-state electronic configuration of a magnesium cation (Mg²⁺) ?

Correct Answer
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A

Which of the following compounds has an atom with an unfilled valence shell of electrons?

Correct Answer
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What is the approximate C-C-C bond angle in propene, CH₃CH=CH₂?

Correct Answer
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How many different isomers are there for a compound having the molecular formula C₃H₆O?

Correct Answer
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Which of the following covalent bonds has the largest dipole moment?

Correct Answer
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Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethylene, H₂C=CH₂?

Correct Answer
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In which of the following ions does carbon have a formal charge? $\mathrm { CH } _ { 3 } \mathrm { OH }\quad$ $\mathrm { NaCH } _ { 3 }\quad$ $\mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } -$ I $\quad\quad\quad\quad\quad$ II $\quad\quad\quad\quad$ III

Correct Answer
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How many constitutional isomers are there for a molecule having the molecular C₃H₈O?

Correct Answer
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Which of the following pair does not represent resonance structures?

Correct Answer
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What is the hybridization for each of the indicated atoms in the following compound?

Correct Answer
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D

Follow the curved arrows to draw the second resonance structure for the ion below.

Correct Answer
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Exam 1: Structure and Bonding

What is the approximate value of the H-C-H bond angle in methane, CH4?

Correct AnswerverifiedB

Avobenzone is an active ingredient in some common sunscreens. Which of the following is the correct molecular formula for avobenzone?

Correct AnswerverifiedShow Answer

Which of the following statements about electronegativity and the periodic table is true?

Correct AnswerverifiedShow Answer

Which of the following molecules has nonpolar covalent bonds?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethane, CH3CH3?

Correct AnswerverifiedShow Answer

Which of the following statements about constitutional isomers is true?

Correct AnswerverifiedShow Answer

What is the hybridization of the carbon atom in the methyl cation, (CH3+) ?

Correct AnswerverifiedShow Answer

What is the ground-state electronic configuration of a magnesium cation (Mg2+) ?

Correct AnswerverifiedA

Which of the following compounds has an atom with an unfilled valence shell of electrons?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the approximate C-C-C bond angle in propene, CH3CH=CH2?

Correct AnswerverifiedShow Answer

How many different isomers are there for a compound having the molecular formula C3H6O?

Correct AnswerverifiedShow Answer

Which of the following covalent bonds has the largest dipole moment?

Correct AnswerverifiedShow Answer

Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethylene, H2C=CH2?

Correct AnswerverifiedShow Answer

In which of the following ions does carbon have a formal charge? CH3OH\mathrm { CH } _ { 3 } \mathrm { OH }\quadCH3​OHNaCH3\mathrm { NaCH } _ { 3 }\quadNaCH3​CH3CO2−\mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } -CH3​CO2​− I \quad\quad\quad\quad\quad II \quad\quad\quad\quad III

Correct AnswerverifiedShow Answer

How many constitutional isomers are there for a molecule having the molecular C3H8O?

Correct AnswerverifiedShow Answer

Which of the following pair does not represent resonance structures?

Correct AnswerverifiedShow Answer

What is the hybridization for each of the indicated atoms in the following compound?

Correct AnswerverifiedD

Follow the curved arrows to draw the second resonance structure for the ion below.

Correct AnswerverifiedShow Answer

What is the approximate value of the H-C-H bond angle in methane, CH₄?

Correct Answer
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B

Correct Answer
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Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethane, CH₃CH₃?

Correct Answer
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Correct Answer
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What is the hybridization of the carbon atom in the methyl cation, (CH₃⁺) ?

Correct Answer
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What is the ground-state electronic configuration of a magnesium cation (Mg²⁺) ?

Correct Answer
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A

Correct Answer
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Correct Answer
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What is the approximate C-C-C bond angle in propene, CH₃CH=CH₂?

Correct Answer
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How many different isomers are there for a compound having the molecular formula C₃H₆O?

Correct Answer
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Correct Answer
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Which atomic orbitals overlap to form the C-H  bonding molecular orbitals of ethylene, H₂C=CH₂?

Correct Answer
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In which of the following ions does carbon have a formal charge? $\mathrm { CH } _ { 3 } \mathrm { OH }\quad$ $\mathrm { NaCH } _ { 3 }\quad$ $\mathrm { CH } _ { 3 } \mathrm { CO } _ { 2 } -$ I $\quad\quad\quad\quad\quad$ II $\quad\quad\quad\quad$ III

Correct Answer
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How many constitutional isomers are there for a molecule having the molecular C₃H₈O?

Correct Answer
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D

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