Deck 13: Structure and Shape

Question 1

Which of the following is the best Lewis diagram for HCO₂^-?

A)
B)
C)
D)
E)

Answer 1

Question 2

Which of the following is the best Lewis diagram for HCO₃^-?

A)
B)
C)
D)
E)

Answer 2

Question 3

Which of the following is the best Lewis diagram for NO₂^-?

A)
B)
C)
D)
E)

Answer 3

Question 4

Which of the following has the electron pair angle 120°?

A)​
B)​
C)​
D)​

Question 5

Which of the following has a trigonal planar electron pair geometry surrounding the central atom?
i.NF₃
ii.BF₃
iii.PH₃
iv.IO₃^-

A)i only
B)ii only
C)i, ii, and iii
D)i, ii, and iv
E)i, ii, iii, and iv

Question 6

Which of the following is the best Lewis diagram for NH₂^-?

A)
B)
C)
D)
E)

Question 7

Which of the following is the best Lewis diagram for H₂CO₃?

A)
B)
C)
D)
E)

Question 8

Which of the following is the best Lewis diagram for CH₂O?

A)
B)
C)
D)
E)

Question 9

Which of the following has a tetrahedral electron pair geometry surrounding the central atom?
i.PH₃
ii.BH₃
iii.BeH₂
iv.OF₂

A)i only
B)ii only
C)iv only
D)i and ii
E)i and iv

Question 10

Which of the following is the best Lewis diagram for CH₃Br?

A)
B)
C)
D)
E)

Question 11

What is the electron pair geometry surrounding the carbon atom in CF₄?

A)Linear
B)Trigonal planar
C)Angular (Bent)
D)Tetrahedral
E)Trigonal pyramid

Question 12

Which of the following is the best Lewis diagram for PCl₃?

A)
B)
C)
D)
E)

Question 13

A molecule consists of a second period central atom with three other atoms singly bonded to it.There is one lone pair of electrons on the central atom,and the other atoms have lone pairs.What is the molecular geometry around the central atom?

A)Linear
B)Trigonal planar
C)Tetrahedral
D)Trigonal pyramid
E)Angular (bent)

Question 14

What is the electron pair geometry shown in the following model?

A)Tetrahedral
B)Angular (Bent)
C)Linear
D)Trigonal planar
E)Trigonal pyramid

Question 15

Which of the following is the electron pair angle in PO₄^3-?

A)180°
B)120°
C)109.5°
D)107.5°
E)104.5°

Question 16

Which of the following has a linear electron pair geometry?
i.IO₂^-
ii.H₂S
iii.BeF₂
iv.ICl₂⁺

A)i only
B)ii only
C)iii only
D)i and iv
E)ii and iii

Question 17

What is the molecular geometry surrounding the carbon atom in CH₄?

A)Tetrahedral
B)Angular (bent)
C)Trigonal pyramid
D)Linear
E)Trigonal planar

Question 18

What is the molecular geometry surrounding the nitrogen atom in NH₄⁺?

A)Angular (bent)
B)Tetrahedral
C)Linear
D)Trigonal pyramid
E)Trigonal planar

Question 19

Which of the following has a trigonal planar molecular geometry?

A)CH₃OH
B)CH₂O
C)NH₃
D)NO₂^-
E)H₂O

Question 20

What is the electron pair geometry surrounding the boron atom in BH₃?

A)Trigonal planar
B)Linear
C)Angular (Bent)
D)Trigonal pyramid
E)Tetrahedral

Question 21

Consider the following general wedge-and-dash diagram: What is the molecular geometry around the central atom of this molecule?

A)Linear
B)Tetrahedral
C)Trigonal planar
D)Bent
E)Trigonal pyramidal

Question 22

Consider the following general wedge-and-dash diagrams. i.ii.iii.Each consists of a central atom bonded to 2 or 4 terminal atoms that are identical to one another.The central atom is different from the terminal atoms.Which of these molecules is/are polar?

A)i only
B)ii only
C)iii only
D)ii and iii
E)i, ii, and iii

Question 23

Consider the following model. What is the molecular geometry surrounding the central atom?

A)Angular (bent)
B)Tetrahedral
C)Linear
D)Trigonal planar
E)Trigonal pyramid

Question 24

Which of the following molecules is/are nonpolar?
i.CH₄
ii.CH₃Cl
iii.CH₂Cl₂
iv.CHCl₃
v.CCl₄

A)i only
B)iii only
C)i and v
D)ii and iv
E)i, iii, and v

Question 25

Which of the following has a trigonal pyramid molecular geometry?

A)Cl₂O
B)BeF₂
C)BH₃
D)NH₃
E)CF₄

Question 26

Consider the following general wedge-and-dash diagram: Which of the following molecules could this diagram represent?

A)NH₃
B)PCl₃
C)NF₃
D)BH₃
E)All of the above could be represented by the diagram.

Question 27

Which of the following statements is/are correct?
i.A molecule is nonpolar if it contains only nonpolar bonds
ii.A polar molecule is one in which there is an asymmetrical distribution of charge.
iii.If the central atom in a molecule has no lone pairs and all the atoms bonded to it are identical,the molecule is nonpolar.

A)i only
B)ii only
C)iii only
D)i and iii
E)All statements are correct

Question 28

Which of the following best describes a polar molecule?

A)One with atoms having the same electronegativities
B)One with asymmetrical distribution of charge
C)A molecule without charge
D)One with a tetrahedral molecular geometry
E)One that has two or more hydrogen atoms

Question 29

Which of the following molecules is/are polar?
i.HF
ii.BH₃
iii.CBr₂F₂
iv.PF₃

A)ii only
B)i and ii
C)ii and iv
D)i, iii, and iv
E)i, ii, iii, and iv

Question 30

Which of the following is better classified as an organic compound than as an inorganic compound?

A)Ne
B)HF
C)H₂O
D)NH₃
E)CH₄

Question 31

Which of the following has a(n)bent (angular)molecular geometry?

A)OF₂
B)CO₂
C)H₃O⁺
D)IO₃^-
E)NH₄⁺

Question 32

Consider the following general wedge-and-dash diagram: Which of the following has this structure?

A)H₂O
B)CO₂
C)BeF₂
D)SiS₂
E)CaCl₂

Question 33

Which of the following molecules is/are polar?

A)i only
B)ii only
C)iii only
D)iv only
E)ii and v

Question 34

Which of the following is better classified as an inorganic compound than an organic compound?

A)CH₃Cl
B)CH₃OH
C)CH₂O
D)Na₂CO₃
E)C₂H₆

Question 35

Which of the following wedge-and-dash diagrams best illustrates the molecular geometry of C₂H₆?

A)
B)
C)
D)
E)

Question 36

Which of the following molecules is/are nonpolar?
i.NH₃
ii.H₂O
iii.HCl
iv.CH₄
v.CH₂Cl₂

A)i only
B)iv only
C)iv and v
D)i, ii, and iii
E)i, ii, iii, iv, and v

Question 37

Which of the following molecular geometries yields molecules which must be nonpolar?

A)Linear
B)Tetrahedral
C)Trigonal planar
D)All yield molecules which must be nonpolar
E)None yields molecules which must be nonpolar

Question 38

Consider the following general wedge-and-dash diagram: Which of the following has this structure?

A)BF₃
B)CH₂O
C)AlCl₃
D)COCl₂
E)PH₃

Question 39

Which of the following is considered to be a region of electron density for purposes of establishing the electron-pair and molecular geometries around a central atom within a molecule?
i.Single bond
ii.Double bond
iii.Triple bond
iv.Lone pair

A)i only
B)i and iv
C)ii and iii
D)i, ii, and iii
E)i, ii, iii, and iv

Question 40

Which of the following molecular models has the same molecular geometry as that surrounding the oxygen atom in OF₂?

A)
B)
C)
D)
E)

Question 41

Which of the following compounds is a hydrocarbon?

A)CH₃NH₂
B)CO₂
C)CH₃(CH₂)₆CH₃
D)C₂H₅OH
E)(C₂H₅)₂O

Question 42

Which of the following compounds is an ether?

A)C₆H₁₂
B)CH₃OH
C)CH₃CH₂COOH
D)CH₃CH₂CH₃
E)None is an ether.

Question 43

Which of the following compounds is a carboxylic acid?

A)C₂H₅OC₂H₅
B)CH₃CH₂CH₂OH
C)HCOOH
D)CH₂Cl₂
E)None is a carboxylic acid.

Question 44

Which of the following types of compounds best describes organic compounds?

A)Carbon compounds
B)Molecular compounds
C)Ionic compounds
D)Covalent compounds
E)Ring compounds

Question 45

Which of the following best describes hydrocarbons?

A)Alkanes in which a hydrogen atom is replaced by a hydroxyl group
B)Binary compounds of carbon and hydrogen
C)Organic compounds containing water and carbon
D)Covalently bonded carbon compounds which have intermolecular force attractions to hydrogen compounds
E)Compounds which are formed by the reaction of a naturally occurring carbon-containing substance and water

Question 46

Which of the following compounds is an alcohol?

A)CH₃CH₃
B)CH₃OCH₂CH₂CH₃
C)CH₃COOH
D)HOCH₂CH₂OH
E)None is an alcohol.

Question 47

Which of the following compounds is not a hydrocarbon?

A)CH₂O
B)CH₄
C)C₆H₆
D)CH₃(CH₂)₈CH₃
E)C₅H₁₀