Question 1

Which of the following statement is incorrect, when the 1s atomic orbitals of two hydrogen atoms results in constructive interference?

Accepted Answer

A)   a sigma bonding molecular orbital is formed
B)   the bonding molecular orbital formed is lower in energy than the 1s atomic orbital
C)   the bonding molecular orbital formed has a node between the atoms
D)   the bonding molecular orbital formed has circular symmetry
E)   a maximum of two electrons may occupy the bonding molecular orbitalF) A) and E)
G) A) and B)

Question 2

What is the correct Lewis structure for SCN- including the formal charges, if any? - including the formal charges, if any?   A)  I B)  II C)  III D)  IV E)  V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) B) and C)
G) None of the above

Question 3

Which of the following compounds have the lowest boiling point?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   II and IVF) A) and C)
G) C) and D)

Question 4

Which of the following compounds have trigonal planar molecular geometry?

Accepted Answer

A)   I, II and III
B)   II and III
C)   III and V
D)   V only
E)   All of theseF) A) and D)
G) A) and E)

Question 5

How many sigma bonds are present in the following compound?

Accepted Answer

A)   20
B)   22
C)   24
D)   25
E)   27F) B) and C)
G) A) and E)

Question 6

Which intermolecular force is primarily responsible for base pairing, and stability, of the double helix in DNA?

Accepted Answer

A)   ion-dipole interactions
B)   London dispersion forces
C)   dipole-dipole interactions
D)   hydrogen bonding
E)   covalent bondingF) B) and E)
G) C) and D)

Question 7

What is the approximate bond angle around the indicated carbon atom? 0 B)  900 C)  109.50 D)  1200 E)  1800" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   600
B)   900
C)   109.50
D)   1200
E)   1800F) B) and C)
G) D) and E)

Question 8

Which of the following structures have a 1- formal charge on the sulfur atom?

Accepted Answer

A)   I
B)   II
C)   III
D)   IV
E)   VF) A) and C)
G) A) and D)

Question 9

What is the hybridization state of the carbon (I)  atom in the following compound? 2 C)  sp3 D)  sp3d E)  sp3d2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   sp
B)   sp2
C)   sp3
D)   sp3d
E)   sp3d2F) B) and D)
G) None of the above

Question 10

Which of the following structures have carbon with sp2 hybridization state? 2 hybridization state?   A)  I and II B)  III and IV C)  I and III D)  II and IV E)  I and IV" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   I and II
B)   III and IV
C)   I and III
D)   II and IV
E)   I and IVF) B) and D)
G) A) and C)

Question 11

The following ground state electron configuration violates ____.

Accepted Answer

A)   the Aufbau principle
B)   the Pauli Exclusion principle
C)   Hund's Rule
D)   Heisenberg's Uncertainty principle
E)   None of these.F) A) and C)
G) C) and E)

Question 12

For NaSCH3, identify each bond as polar covalent, nonpolar covalent or ionic.

Accepted Answer

Question 13

Interaction of the following two atomic orbitals results in what kind of molecular orbital, in the orientation shown?

Accepted Answer

sigma bond...

Question 14

What are the formal charges on boron and oxygen in the following structure?

Accepted Answer

A)   B = 1-, O = 1-
B)   B = 1-, O = 1+
C)   B = 1+, O = 1+
D)   B = 1+, O = 1-
E)   B = 1-, O = 0F) A) and B)
G) A) and E)

Question 15

The electronegativity of elements on the periodic table tends to increase_______.

Accepted Answer

A)   from left to right, top to bottom
B)   from right to left, bottom to top
C)   from left to right, bottom to top
D)   from right to left, top to bottom
E)   from upper right to lower leftF) None of the above
G) A) and E)

Question 16

What is the letter designation for the following atomic orbital?

Accepted Answer

A)   s
B)   p
C)   d
D)   f
E)   gF) C) and D)
G) A) and D)

Question 17

What is the hybridization state of the nitrogen atom in the following compound? 2 C)  sp3 D)  sp3d E)  s2p" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   sp
B)   sp2
C)   sp3
D)   sp3d
E)   s2pF) A) and D)
G) C) and E)

Question 18

According to molecular orbital theory the highest energy molecular orbital that is occupied with an electron is referred to as _____.

Accepted Answer

A)   degenerate
B)   antibonding
C)   the LCAO
D)   the LUMO
E)   the HOMOF) A) and B)
G) C) and D)

Question 19

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

Accepted Answer

A)   C-C
B)   C-H
C)   C-O
D)   N-H
E)   H-FF) A) and C)
G) A) and E)

Question 20

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

Accepted Answer

A)   I - sp ; II - sp2 ; III - sp3 ; IV - sp2
B)   I - sp2 ; II - sp ; III - sp2 ; IV - sp3
C)   I - sp3 ; II - sp2 ; III - sp ; IV - sp2
D)   I - sp2 ; II - sp3 ; III - sp2 ; IV - sp
E)   I - sp2 ; II - sp2 ; III - sp2 ; IV - sp3F) B) and C)
G) A) and C)

Exam 1: A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

What is the letter designation for the following atomic orbital?

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What is the hybridization state of the carbon (I) atom in the following compound?

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According to molecular orbital theory the highest energy molecular orbital that is occupied with an electron is referred to as _____.

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What is the approximate bond angle around the indicated carbon atom?

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What is the hybridization state of the nitrogen atom in the following compound?

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What are the formal charges on boron and oxygen in the following structure?

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What is the hybridization state of the indicated atoms in the following compound?

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Which of the following structures have a 1- formal charge on the sulfur atom?

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Which intermolecular force is primarily responsible for base pairing, and stability, of the double helix in DNA?

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The following ground state electron configuration violates ____.

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Interaction of the following two atomic orbitals results in what kind of molecular orbital, in the orientation shown?

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

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Which of the following compounds have the lowest boiling point?

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Which of the following structures have carbon with sp2 hybridization state?

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Which of the following compounds have trigonal planar molecular geometry?

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For NaSCH3, identify each bond as polar covalent, nonpolar covalent or ionic.

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The electronegativity of elements on the periodic table tends to increase_______.

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Which of the following statement is incorrect, when the 1s atomic orbitals of two hydrogen atoms results in constructive interference?

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How many sigma bonds are present in the following compound?

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What is the correct Lewis structure for SCN- including the formal charges, if any?

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sigma bond...
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Which of the following structures have carbon with sp² hybridization state?

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For NaSCH₃, identify each bond as polar covalent, nonpolar covalent or ionic.

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What is the correct Lewis structure for SCN^- including the formal charges, if any?

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