Bonding 

1. Which one of the following is most likely to be an ionic compound?  

a.

 

HNF

2

  

b.

 

H

2

CO  

c.

 

N

2

H

4

  

d.

 

CaCl

2

  

e.

 

CH

3

Cl  

2. In which of the following processes does the enthalpy change (

Δ

H

) directly represent 

the magnitude of the lattice energy of KCl(

s

)?  

a.

 

Cl

2

(

g

) + 2K(

s

) 

→

 2KCl(

s

)  

b.

 

KCl(

s

) 

→

 K

+

(

aq

) + Cl

-

(

aq

)  

c.

 

KCl(

s

) 

→

 K

+

(

g

) + Cl

-

(

g

)  

d.

 

KCl(

s

) 

→

 K(

s

) + Cl

-

(

g

)  

e.

 

KCl(

s

) 

→

 K(

s

) + Cl(

g

)  

3. Order the following by increasing bond strength: N

≡

N, N=N, N-N  

a.

 

N

≡

N, N=N, N-N  

b.

 

N

≡

N, N-N, N=N  

c.

 

N-N, N=N, N

≡

N  

d.

 

N=N, N-N, N

≡

N  

e.

 

N=N, N

≡

N, N-N  

4. Which of the following compounds has the greatest bond polarity?  

a.

 

PH

3

  

b.

 

NH

3

  

c.

 

HF  

d.

 

H

2

S  

e.

 

CH

4

  

5. Which of the following is not planar?  

a.

 

BCl

3

  

b.

 

ClF

3

  

c.

 

PCl

3

  

d.

 

XeF

4

  

e.

 

C

2

H

4