1 Argon (Ar) atoms do attract one another weakly through_____ dipole-induced dip

Question

1 Argon (Ar) atoms do attract one another weakly through_____

dipole-induced dipole forces

dipole-dipole forces

dispersion forces

ion-dipole forces

2
I) An increase in surface area

II) A decrease in the strength of intermolecular forces

III) A decrease in temperature

All of the above

Only II

Only III

I and II

3 Which of the responses includes all of the following that can form hydrogen bonding with water molecules?

1. Na+

2. CH3OH

3. C2H6

4. HCOOH

1 and 4

3 and 4

2 and 4

1 and 2

4 What is the strongest type of intermolecular force present in NH2CH3?

dipole-dipole

hydrogen bonding

dispersion

ion-dipol

5 Which of the following compounds has dipole-dipole interactions as its dominant (strongest) type of intermolecular force?

RbCl

H2S

HF

NH3

6 Which liquid has the highest boiling point?

C2H5OH

they all exhibit the same boiling point

C2H5SH

C2H6

7 Which of the following substances has the highest heat of vaporization?

CH3OH

C6H6

H2O

H2S

8 In which of the following molecules is the dispersion force likely to be the most important in determining the melting and boiling points?

ICl

HCl

CO

Br2

9 Which of the following liquids would have the highest viscosity at the same temperature?

CH3CH2CH2OH

CH3CH2Cl

C2H5OH

C2H5OC2H5

10 The vapor pressure of ethyl acetate is 300 torr at 51 °C, and its enthalpy of vaporization is 37.66 kJ/mol. Estimate the normal boiling point of this compound.

92°C

31 °C

74 °C

12.6 °C

dipole-induced dipole forces

dipole-dipole forces

Explanation / Answer

ANswer 1. Dispersion forces.

Though Argon atoms do not combine to form Ar2, but they do attract each other weakly thorough dispersion forces.

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