Deck 4: Molecular Shape and Structure

Question 1

Name all the angles in a trigonal planar geometry.

Answer 1

120 $\degree$

Question 2

What is the shape of ClF₃?

A)Tetrahedral
B)Seesaw
C)Trigonal bipyramidal
D)T-shaped
E)Square planar

Answer 2

T-shaped

Question 3

What is the shape of COCl₂?

A)T-shaped
B)Trigonal planar
C)Trigonal pyramidal
D)Tetrahedral
E)Seesaw

Answer 3

Trigonal planar

Question 4

Predict the electron arrangement in ClF₃.

Question 5

Predict the electron arrangement in IF₅.

Question 6

What is the shape of BrO₄ ^- ?

A)Tetrahedral
B)Trigonal bipyramidal
C)Seesaw
D)T-shaped
E)Square planar

Question 7

All the following have a linear shape except

A)BeCl₂.
B)O₃.
C)I₃ ^- .
D)XeF₂.
E)CS₂.

Question 8

What is the shape of SO₃^{2 -} ?

A)T-shaped
B)Trigonal pyramidal
C)Seesaw
D)Tetrahedral
E)Trigonal planar

Question 9

What is the shape of AsF₃?

A)T-shaped
B)Trigonal planar
C)Trigonal pyramidal
D)Tetrahedral
E)Seesaw

Question 10

All the following have an angular shape except

A)HOCl.
B)S₃^{2 -} .
C)I₃ ^- .
D)ClO₂ ^- .
E)NH₂ ^- .

Question 11

Name all the angles in a trigonal bipyramidal geometry.

Question 12

What is the shape of AlH₄ ^- ?

A)Tetrahedral
B)Trigonal bipyramidal
C)Seesaw
D)T-shaped
E)Square planar

Question 13

What is the shape of XeF₄?

A)Square planar
B)Tetrahedral
C)Trigonal bipyramidal
D)Seesaw
E)T-shaped

Question 14

Predict the HNH bond angle in NH₂ ^- .

Question 15

What is the shape of ICl₄ ^- ?

A)T-shaped
B)Trigonal bipyramidal
C)Seesaw
D)Tetrahedral
E)Square planar

Question 16

All the following have a linear shape except

A)IF₂^-.
B)CS₂.
C)XeF₂.
D)I₃ ^- .
E)I₃⁺.

Question 17

Predict the electron arrangement in NO₂ ^- .

Question 18

What is the shape of CS₃^{2 -} ?

A)Trigonal pyramidal
B)Trigonal planar
C)T-shaped
D)Tetrahedral
E)Seesaw

Question 19

What is the shape of IF₄⁺?

A)Tetrahedral
B)Seesaw
C)Trigonal bipyramidal
D)Square planar
E)T-shaped

Question 20

The electron arrangement and shape in IF₄⁺,respectively,are

Question 21

Which of the following has bond angles of 180 $\degree$ ?

A)I₃ ^-
B)ClO₂ ^-
C)O₃
D)NH₂ ^-
E)HO₂ ^-

Question 22

Which of the following has bond angles of 120 $\degree$ ?

A)HO₂ ^-
B)CS₃^{2 -}
C)S₃^{2 -}
D)O₃
E)NO₂ ^-

Question 23

All the following have an angular shape except

A)N₃ ^- .
B)ClO₂ ^- .
C)S₃^{2 -} .
D)HOCl.
E)NH₂ ^- .

Question 24

Which of the following has bond angles slightly less than 109 $\degree$ ?

A)NO₂ ^-
B)I₃ ^-
C)HOCl
D)O₃
E)CH₂ ^-

Question 25

Which of the following is polar?

A)NON
B)XeF₂
C)XeO₂
D)ICl₄ ^-
E)I₃ ^-

Question 26

Which of the following only has bond angles of 90 $\degree$ and 180 $\degree$ ?

A)IF₅
B)BrF₃
C)BCl₃
D)NO₃ ^-
E)ICl₄⁺

Question 27

Which of the following has bond angles slightly less than 109 $\degree$ ?

A)CS₃^{2 -}
B)AsF₃
C)SO₂
D)COCl₂
E)COS

Question 28

Which of the following only has bond angles of 90 $\degree$ ?

A)IF₅
B)IF₄⁺
C)XeF₂
D)SF₄
E)IO₂F₃

Question 29

Which of the following has bond angles slightly less than 109 $\degree$ ?

A)NH₄⁺
B)ClO₄ ^-
C)BrO₃ ^-
D)PO₄^{3 -}
E)BH₄^-

Question 30

Which of the following has bond angles slightly less than 120 $\degree$ ?

A)SO₃
B)SF₂
C)I₃ ^-
D)NO₃ ^-
E)O₃

Question 31

All the following are polar except

A)O₃.
B)ClF₃.
C)COCl₂.
D)BrO₃ ^- .
E)CS₃^{2 -} .

Question 32

All the following are polar except

A)S₃^{2 -} .
B)NH₂ ^-.
C)I₃ ^-.
D)O₃
E)I₃⁺.

Question 33

Which of the following has bond angles of 90 $\degree$ ,120 $\degree$ ,and 180 $\degree$ ?

A)PF₆ ^-
B)IF₅
C)XeF₄
D)ICl₄ ^-
E)SF₄

Question 34

Which of the following is polar?

A)CO₃^{2 -}
B)O₃
C)XeF₂
D)I₃ ^-
E)NON

Question 35

Which of the following is polar?

A)SF₆
B)ICl₄ ^-
C)SF₄
D)AsF₆ ^-
E)XeF₄

Question 36

Which of the following has bond angles of 180 $\degree$ ?

A)N₂O
B)ClO₂ ^-
C)O₃
D)HO₂ ^-
E)NH₂ ^-

Question 37

All the following are polar except

A)ClF₃.
B)COCl₂.
C)BO₃^{3 -} .
D)BrO₃ ^- .
E)O₃.

Question 38

Which of the following is polar?

A)XeF₄
B)PCl₅
C)ICl₄ ^-
D)SF₆
E)IF₅

Question 39

Which of the following has bond angles slightly less than 120 $\degree$ ?

A)NO₃ ^-
B)HO₂ ^-
C)NO₂ ^-
D)CS₃^{2 -}
E)I₃⁺

Question 40

All of the following are polar except

A)SF₄.
B)ClO₂ ^- .
C)IF₄⁺.
D)XeF₄.
E)ClF_3.

Question 41

Which of the following is diamagnetic?

A)O₂^{2 -}
B)S₂
C)O₂ ^-
D)O₂⁺

Question 42

Which of the following would have the longest bond?

A)B₂
B)C₂
C)N₂
D)C₂^{2 -}
E)N₂^{2 -}

Question 43

Draw the Lewis structure of the cyanamide ion,NCNH ^- ,and give the number of lone pairs of electrons and the number of $\sigma$ - and $\pi$ bonds.

Question 44

Draw the Lewis structure of formamide,NH₂CHO,and give the number of lone pairs of electrons,and the number of $\sigma$ - and $\pi$ -bonds.

Question 45

The hybrid orbitals used by the underlined atoms in CH₃CH₂OCH₂CH₃,from left to right,respectively,are

A)sp and sp.
B)sp³ and sp.
C)sp³ and sp³.
D)sp and sp³.
E)sp² and sp³.

Question 46

The bond order of N₂²⁺ is

A)2.5.
B)1.
C)2.
D)1.5.
E)3.

Question 47

The hybrid orbitals used by the underlined atoms in CH₃CHCHCN,from left to right,respectively,are

A)sp³ and sp.
B)sp² and sp.
C)sp² and sp³.
D)sp² and sp².
E)sp and sp³.

Question 48

All the following are polar except

A)XeO₂.
B)ClF₃.
C)XeF₄.
D)SOCl₂.
E)XeO₃.

Question 49

How many $\sigma$ - and $\pi$ -bonds,respectively,are there in peroxyacetylnitrate,CH₃C(O)O-ONO₂?

A)9 and 2
B)10 and 2
C)10 and 1
D)8 and 4
E)8 and 2

Question 50

Which of the following is paramagnetic?

A)N₂
B)B₂
C)O₂^{2 -}
D)C₂^{2 -}
E)B₂^{2 -}

Question 51

For the Lewis structure of the cyanamide ion that contains two double bonds,N=C=NH ^- ,the hybrid orbitals used by the underlined nitrogen atom and the carbon atom,respectively,are

A)sp² and sp³.
B)sp and sp.
C)sp² and sp².
D)sp and sp³.
E)sp² and sp.

Question 52

The bond order of O₂²⁺ is

A)1.
B)2.
C)3.
D)2.5.
E)1.5.

Question 53

The hybrid orbitals used by the underlined atoms in CH₂CHCHO,from left to right,respectively,are

A)sp³ and sp².
B)sp² and sp².
C)sp² and sp.
D)sp and sp.
E)sp³ and sp.

Question 54

The NCO bond angle in formamide,H₂NCHO,is __________.

Question 55

Identify the hybrid orbitals used by the underlined atom in acetone,CH₃COCH₃.

A)sp³d
B)sp²
C)None; pure p_z-orbitals are used in bonding.
D)sp³
E)sp

Question 56

How many $\sigma$ - and $\pi$ -bonds are present in diazomethane,CH₂NN?

Question 57

How many $\sigma$ - and $\pi$ -bonds,respectively,are there in acrolein,CH₂=CHCHO?

A)4 and 2
B)7 and 2
C)5 and 2
D)5 and 4
E)7 and 1

Question 58

What is the ground-state electron configuration of O₂ ^- 0?

Question 59

The molecule cis-dichloroethene is nonpolar.True or false?

Question 60

All the following are paramagnetic except

A)O₂⁺.
B)O₂ ^- .
C)N₂²⁺.
D)N₂^{2 -}
E)O₂.

Question 61

What is the hybridization of the bolded atoms NNC,from left to right,in azidocarbonamide,H₂NC(O)NNC(O)NH₂?

A)sp³, sp, sp²
B)sp², sp, sp³
C)sp², sp, sp²
D)sp, sp, sp²
E)sp², sp², sp²

Question 62

Two Lewis structures can be written for diazomethane,where the arrangement of atoms is H₂C-N-N.The hybrid orbitals used by the bold atoms in these Lewis structures are

A)sp³ or sp², and sp.
B)sp² and sp.
C)sp³ and sp.
D)sp³ or sp², and sp².

Question 63

Which of the following is paramagnetic?

A)N₂
B)N₂²⁺
C)O₂^{2 -}
D)N₂^{2 -}
E)NO⁺

Question 64

Which of the following is a p-type semiconductor?

A)Selenium doped with indium
B)Silicon doped with arsenic
C)GaAs with arsenic in excess of gallium
D)Germanium doped with arsenic
E)Silicon doped with phosphorus

Question 65

Which of the following molecules is (are)polar? (a)AsCl₄⁺ (b)I₃⁺ (c)I₃^- (d)N₃^-(e)S₃^2-

A)(b)and (e)
B)(b)and (c)
C)(c)and (e)
D)only (e)

Question 66

Gallium is a semiconductor.Which of the following should be added in small amounts to produce a p-type semiconductor?

A)Si
B)Sb
C)B
D)P
E)As

Question 67

An AX₃E₂ molecule has a trigonal planar shape.True or false?

Question 68

What is the bond order in the OH radical?

Question 69

Which of the following is an n-type semiconductor?

A)Silicon doped with phosphorus
B)Silicon doped with boron
C)GaAs with gallium in excess of arsenic
D)Selenium doped with indium
E)Germanium doped with indium

Question 70

Which of the following has the longest bond?

A)N₂
B)NO ^-
C)N₂²⁺
D)N₂^{2 -}
E)O₂^{2 -}

Question 71

When two atoms are brought together along the x-axis,what is the number of $\sigma$ bonds that can be formed by overlap of p-orbitals on each atom?

A)0
B)1
C)2
D)3

Question 72

How many $\sigma$ - and $\pi$ -bonds,respectively,are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?

A)14 and 3
B)15 and 3
C)14 and 2
D)8 and 3
E)11 and 3

Question 73

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?

A)8
B)12
C)10
D)16
E)6

Question 74

The fact that B₂ has two unpaired electrons means the 2p _$\pi$ molecular orbitals have higher energy than the 2p _$\sigma$ molecular orbitals.

Question 75

What is the approximate NNC bond angle in azidocarbonamide,H₂NC(O)NNC(O)NH₂?

A)118 $\degree$
B)180 $\degree$
C)90 $\degree$
D)107 $\degree$
E)109 $\degree$

Question 76

Germanium is a semiconductor.Which of the following should be added in small amounts to produce a p-type semiconductor?

A)Bi
B)As
C)P
D)Sb
E)B

Question 77

Which of the following species has two unpaired electrons?

A)OF⁺
B)NO⁺
C)CO⁺
D)NF⁺
E)CF⁺

Question 78

Which of the following species has the shortest bond length?

A)NO^{2 -}
B)NO²⁺
C)NO ^-
D)NO
E)NO⁺

Question 79

The OSO bond angle in the sulfite ion is ___________________ (greater than/equal to/ less than)109.5 $\degree$ .

Question 80

How many peaks would you predict for the photoelectron spectrum of water using 1)the molecular orbital model and 2)the VSEPR model?