Intermolecular Forces and Polarity

Which of the following will NOT have hydrogen bonding?

• 
• 
• 
• 

The polarity of a bond is determined by...

• The sum of the electronegativities of the two atoms

• The difference in the electronegativities of the two atoms

• The charges of the atoms

• The number of electrons shared in the bond

Does HF have hydrogen bonding?

• yes

• no

Polarity of a molecule is determined by

• shape and charge

• shape and difference in EN value

• difference in EN value and size

• difference in EN value and charges

Why BCI₃ is non polar while NCI₃ is polar?

• BCI₃ is symmetrical and bond polarity exist

• BCI₃ does not have polar bonds, while NCI₃ does

• BCI₃ is asymmetrical and bond polarity exist

• BCI₃ is symmetrical and bond polarity cancel

A molecule is polar when

• it is asymmetrical with at least one polar bond

• it is symmetrical

• it is asymmetrical

• it is symmetrical with at least one polar bond

Rank these in order of strength (strongest first):
dispersion force
hydrogen bond
dipole-dipole attraction

• dipole-dipole>hydrogen bond>dispersion

• dispersion>dipole-diple>hydrogen bond>covalent bond

• hydrogen bond>dipole-dipole>dispersion

The following are requirement for hydrogen bonding EXCEPT

• H atom bonded to electronegative N, O and F

• Electronegative element like N, O and F must be present

• H atom bonded with lone pair electrons from Gp 7

• ESF attraction between H atom with lone pair electron from N,O,F

When you have Li-O, what is the polarity?

• nonpolar

• polar

• ionic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Use your knowledge and electronegativity sheet to predict what the following compound is classified as.

• polar covalent

• nonpolar covalent

• ionic

• metallic