Question 1

A species with a bond order of 1/2 may be stable.

Accepted Answer

A) True 
 B)False

Question 2

Indicate the type of hybrid orbitals used by the central atom in TeF4.

Accepted Answer

A)  sp
B)  sp2
C)  sp3
D)  sp3d
E)  sp3d2F) D) and E)
G) A) and C)

Question 3

In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?

Accepted Answer

A)  N2
B)  O2
C)  F2
D)  all of these
E)  none of theseF) None of the above
G) All of the above

Question 4

According to VSEPR theory, which of the following triatomic ions should be linear: N3-, I3-, NO2-, ClO2-, SCN-?

Accepted Answer

N₃^-, I₃^-, and ...

Question 5

The bond angles in SF5+ are expected to be

Accepted Answer

A)  90°.
B)  120°.
C)  90° and 120°.
D)  90° and 180°.
E)  90°, 120°, and 180°.F) A) and B)
G) C) and E) E

Question 6

According to the VSEPR theory, the molecular geometry of ammonia is

Accepted Answer

A)  linear.
B)  trigonal planar.
C)  bent.
D)  tetrahedral.
E)  trigonal pyramidal.F) B) and D)
G) B) and E)

Question 7

Give the number of lone pairs around the central atom and the geometry of the ion SeO42-.

Accepted Answer

A)  0 lone pairs, square planar
B)  0 lone pairs, tetrahedral
C)  1 lone pair, distorted tetrahedron (seesaw) 
D)  1 lone pair, square pyramidal
E)  2 lone pairs, square planarF) C) and E)
G) All of the above

Question 8

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

Accepted Answer

A)  0 lone pairs, linear
B)  1 lone pair, bent
C)  2 lone pairs, bent
D)  3 lone pairs, bent
E)  3 lone pairs, linearF) A) and B)
G) A) and C)

Question 9

Which of the following substance is/are planar? (i) SO3  (ii) SO32-  (iii) NO3-  (iv) PF3 (v) BF3

Accepted Answer

A)  only (i) and (ii) 
B)  only (i) , (iii) , and (v) 
C)  only (iv) 
D)  all are planar except (iv) 
E)  all are planar except (ii) F) None of the above
G) D) and E)

Question 10

The N - N - H bond angles in hydrazine N2H4 are 112°. What is the hybridization of the nitrogen orbitals predicted by valence bond theory?

Accepted Answer

Question 11

Predict the geometry around the central atom in XeO4.

Accepted Answer

A)  trigonal planar
B)  trigonal pyramidal
C)  tetrahedral
D)  trigonal bipyramidal
E)  octahedralF) A) and E)
G) A) and B) C

Question 12

Which one of the following molecules is polar?

Accepted Answer

A)  PBr5
B)  CCl4
C)  BrF5
D)  XeF2
E)  XeF4F) A) and E)
G) A) and D)

Question 13

In which of the following would the bonding be strengthened with the addition of an electron to form the negative molecular ion?

Accepted Answer

A)  N2
B)  O2
C)  F2
D)  all of these
E)  none of theseF) All of the above
G) A) and C)

Question 14

Which of the following molecules have the same geometries?

Accepted Answer

A)  SF4 and CH4
B)  CO2 and H2O
C)  CO2 and BeH2
D)  N2O and NO2E) A) and D)
F) B) and D)

Question 15

In which one of the following molecules is the central atom sp2 hybridized?

Accepted Answer

A)  SO2
B)  N2O
C)  BeCl2
D)  NF3
E)  PF5F) B) and C)
G) A) and E)

Question 16

A bonding molecular orbital is of lower energy (more stable)than the atomic orbitals from which it was formed.

Accepted Answer

A) True 
 B)False

Question 17

The bond angle in ICl2- is expected to be

Accepted Answer

A)  a little less than 109.5°.
B)  109.5°.
C)  a little more than 109.5°.
D)  120°.
E)  180°.F) C) and D)
G) None of the above E

Question 18

Use VSEPR theory to predict the molecular geometry of CO32-.

Accepted Answer

Question 19

Give the number of lone pairs around the central atom and the molecular geometry of SCl2.

Accepted Answer

A)  0 lone pairs, linear
B)  1 lone pair, bent
C)  2 lone pairs, bent
D)  3 lone pairs, bent
E)  3 lone pairs, linearF) A) and C)
G) None of the above

Question 20

According to the VSEPR theory, the molecular geometry of SiCl4 is

Accepted Answer

A)  linear.
B)  trigonal planar.
C)  bent.
D)  tetrahedral.
E)  trigonal pyramidal.F) C) and E)
G) A) and E)

Exam 10: Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

A species with a bond order of 1/2 may be stable.

Correct AnswerverifiedShow Answer

Indicate the type of hybrid orbitals used by the central atom in TeF4.

Correct AnswerverifiedShow Answer

In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?

Correct AnswerverifiedShow Answer

According to VSEPR theory, which of the following triatomic ions should be linear: N3-, I3-, NO2-, ClO2-, SCN-?

Correct AnswerverifiedN3-, I3-, and ...View AnswerShow Answer

The bond angles in SF5+ are expected to be

Correct AnswerverifiedE

According to the VSEPR theory, the molecular geometry of ammonia is

Correct AnswerverifiedShow Answer

Give the number of lone pairs around the central atom and the geometry of the ion SeO42-.

Correct AnswerverifiedShow Answer

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

Correct AnswerverifiedShow Answer

Which of the following substance is/are planar? (i) SO3 (ii) SO32- (iii) NO3- (iv) PF3 (v) BF3

Correct AnswerverifiedShow Answer

The N - N - H bond angles in hydrazine N2H4 are 112°. What is the hybridization of the nitrogen orbitals predicted by valence bond theory?

Correct AnswerverifiedShow Answer

Predict the geometry around the central atom in XeO4.

Correct AnswerverifiedC

Which one of the following molecules is polar?

Correct AnswerverifiedShow Answer

In which of the following would the bonding be strengthened with the addition of an electron to form the negative molecular ion?

Correct AnswerverifiedShow Answer

Which of the following molecules have the same geometries?

Correct AnswerverifiedShow Answer

In which one of the following molecules is the central atom sp2 hybridized?

Correct AnswerverifiedShow Answer

A bonding molecular orbital is of lower energy (more stable)than the atomic orbitals from which it was formed.

Correct AnswerverifiedShow Answer

The bond angle in ICl2- is expected to be

Correct AnswerverifiedE

Use VSEPR theory to predict the molecular geometry of CO32-.

Correct AnswerverifiedShow Answer

Give the number of lone pairs around the central atom and the molecular geometry of SCl2.

Correct AnswerverifiedShow Answer

According to the VSEPR theory, the molecular geometry of SiCl4 is

Correct AnswerverifiedShow Answer

Correct Answer
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Indicate the type of hybrid orbitals used by the central atom in TeF₄.

Correct Answer
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According to VSEPR theory, which of the following triatomic ions should be linear: N₃^-, I₃^-, NO₂^-, ClO₂^-, SCN^-?

Correct Answer
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N₃^-, I₃^-, and ...
View Answer

The bond angles in SF₅⁺ are expected to be

Correct Answer
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E

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Give the number of lone pairs around the central atom and the geometry of the ion SeO₄^2-.

Correct Answer
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Give the number of lone pairs around the central atom and the geometry of the ion IBr₂^-.

Correct Answer
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Which of the following substance is/are planar? (i) SO₃ (ii) SO₃^2- (iii) NO₃^- (iv) PF₃ (v) BF₃

Correct Answer
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The N - N - H bond angles in hydrazine N₂H₄ are 112°. What is the hybridization of the nitrogen orbitals predicted by valence bond theory?

Correct Answer
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Predict the geometry around the central atom in XeO₄.

Correct Answer
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C

Correct Answer
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In which one of the following molecules is the central atom sp² hybridized?

Correct Answer
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The bond angle in ICl₂^- is expected to be

Correct Answer
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E

Use VSEPR theory to predict the molecular geometry of CO₃^2-.

Correct Answer
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Give the number of lone pairs around the central atom and the molecular geometry of SCl₂.

Correct Answer
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According to the VSEPR theory, the molecular geometry of SiCl₄ is

Correct Answer
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