Ch 26 II

Question 1

Dipole-dipole interactions are present in solid and liquids, but aren’t found in gas phases due to

Answer 1

Molecules being far apart

Question 2

Polar species have what compared to nonpolar species

Answer 2

Boiling points

Question 3

Substances with hydrogen bonding have

Answer 3

unusually high boiling points

Question 4

Hydrogen bonds are formed between H and

Answer 4

F,N and O

Question 5

Hydrogen bonding is important in behavior of

Answer 5

Water, alcohols, amines, and carboxylic acids

Question 6

The shortest bond length has what kind of bond energy

Answer 6

The highest

Question 7

Is an HF bond more or less polar than HH bond?

Answer 7

HF is more polar, since there are different electronegativities

Question 8

Arrange the compounds in increasing polarity:
HCN
NaCl
Cl2

Answer 8

Cl2 < HCN < NaCl

Question 9

What bonds are stronger than ion-ion

Answer 9

Metal and nonmetal

Question 10

Which has a greater C-C bond distance:
C2H4
C2H2

Answer 10

C2H4, because it has a double bond

Question 11

Which has a greater C-C bond energy:
C2H4
C2H2

Answer 11

C2H2, since it has a triple bond

Question 12

All paramagnetic molecules are weakly drawn to

Answer 12

A magnetic field

Question 13

How to tell if a molecule is paramagnetic?

Answer 13

It has an odd number of valence electrons