Organic Chemistry A Short Course 13Th Ed - Test Bank

Chapter 1 -- Bonding and Isomerism

MULTIPLE CHOICE

1. What is the most electropositive element?

A)	Li
B)	Be
C)	B
D)	C
E)	N

ANS: A TOP: Valence, Bonding, and Lewis Structures

2. Which of the following elements has three electrons in the valence (outer) shell?

A)	C
B)	B
C)	S
D)	F
E)	N

ANS: B TOP: Valence, Bonding, and Lewis Structures

3. Which of the following would you expect to have ionic bonds?

A)	HBr
B)	CO
C)	ICl
D)	CsF
E)	NF3

ANS: D TOP: Valence, Bonding, and Lewis Structures

4. Which of the following would you expect to have polar covalent bonds?

A)	MgF2
B)	N2
C)	F2
D)	NF3
E)	NaF

ANS: D TOP: Valence, Bonding, and Lewis Structures

5. Which molecule has nonpolar covalent bonds?

A)	NO
B)	N2
C)	BCl3
D)	HF
E)	CCl4

ANS: B TOP: Valence, Bonding, and Lewis Structures

6. The number of electrons in the valence shell of sulfur is:

A)	2
B)	3
C)	4
D)	5
E)	6

ANS: E TOP: Valence, Bonding, and Lewis Structures

7. Which of the following elements is the most electronegative?

A)	O
B)	S
C)	Se
D)	Te
E)	Po

ANS: A TOP: Valence, Bonding, and Lewis Structures

8. If the Cl–Cl bond length is 1.98Å and the C–C bond length is 1.54Å, what would you expect the bond length of Cl–C to be?

A)	0.74Å
B)	1.54Å
C)	1.76Å
D)	1.98Å
E)	3.52Å

ANS: C TOP: Valence, Bonding, and Lewis Structures

9. Given the following electronegativity values, predict the most polar covalent bond below:

F

4.0

Cl