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Chemistry multiple choice 3
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1.   For the elements Cs, F, and P, the order of increasing electronegativity is:

A)

Cs < F < P

B)

Cs < P < F

C)

P < F < Cs

D)

F < Cs < P

E)

none of these

 

2.   Choose the compound with the most ionic bond.

A)

LiCl

B)

KF

C)

NaCl

D)

LiF

E)

KCl

 

3.   Which of the following bonds is least polar?

A)

C—O

B)

H—C

C)

S—Cl

D)

Br—Br

E)

They are all nonpolar.

 

4.   In which case is the bond polarity incorrect?

A)

d+H–Fd

B)

d+K–Od

C)

d+Mg–Hd

D)

d+Cl–Id

E)

d+Si–Sd

 

5.   The electron pair in a C-F bond could be considered

A)

closer to C because carbon has a larger radius and thus exerts greater control over the shared electron pair

B)

closer to F because fluorine has a higher electronegativity than carbon

C)

closer to C because carbon has a lower electronegativity than fluorine

D)

an inadequate model since the bond is ionic

E)

centrally located directly between the C and F

 

6.   Which of the following bonds would be the most polar without being considered ionic?

A)

Mg-O

B)

C-O

C)

O-O

D)

Si-O

E)

N-O

7.   Which of the following statements is incorrect?

A)

Ionic bonding results from the transfer of electrons from one atom to another.

B)

Dipole moments result from the unequal distribution of electrons in a molecule.

C)

The electrons in a polar bond are found nearer to the more electronegative element.

D)

A molecule with very polar bonds can be nonpolar.

E)

Linear molecules cannot have a net dipole moment.

 

8.   Which of these is an isoelectronic series?

A)

Na+, K+, Rb+, Cs+

B)

K+, Ca2+, Ar, S2–

C)

Na+, Mg2+, S2–, Cl

D)

Li, Be, B, C

E)

none of these (A-D)

 

9.   Which of the following ionic compounds has the largest lattice energy (i.e., the lattice energy most favorable to a stable lattice)?

A)

BaO

B)

BeO

C)

CsI

D)

NaBr

E)

BaS

 

10.  Which of the following statements are true concerning ionic bonding?

A)

Ionic bonding occurs between a metal, which has a high affinity for electrons, and a nonmetal, which loses electrons relatively easy.

B)

CaCl2 forms because Ca2+ is always a more stable species than the calcium atom alone.

C)

Compounds with ionic bonds tend to have low melting points.

D)

The electronegativity difference between the bonding atoms of ionic compounds is small since the electrons are not shared but rather held together by electrostatic forces.

E)

All of the above statements are false.

 

11.  Which of the following statements concerning lattice energy is false?

A)

It is often defined as the energy released when an ionic solid forms from its ions.

B)

MgO has a larger lattice energy than NaF.

C)

The lattice energy for a solid with 2+ and 2– ions should be two times that for a solid with 1+ and 1– ions.

D)

MgO has a larger lattice energy than LiF.

E)

All of these are true.

 

 

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Chemistry multiple choice 3
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