IMF and polar/non-polar bonds

What explains the very high melting and boiling point of water

• Strong dipole-dipole bonds between water molecules
• Strong hydrogen bonds between water molecules
• Dispersion forces which are present in all molecules
• Asymmetrical shape of the polar bonds.

Tags

NGSS.MS-PS1-4

Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?

• CBr₄
• NO₂
• H₂S
• NH₃

Does H₂O have hydrogen bonding?

• yes
• no

Tags

NGSS.HS-PS1-3

Does HF have hydrogen bonding?

• yes
• no

Does CH₄ have hydrogen bonding?

• yes
• no

Does HCl have hydrogen bonding?

• yes
• no

London forces are stronger in heavier atoms or molecules, and weaker in lighter atoms or molecules.  Which of these has the strongest London forces?

• F₂
• Br₂
• I₂
• Cl₂

Tags

NGSS.HS-PS1-3

In general, substances with stronger intermolecular forces have ___________  boiling points than those with weaker intermolecular forces

• higher
• lower

Tags

NGSS.HS-PS1-3

Rank these in decreasing order of strength:

ionic bond

London forces

hydrogen bond

dipole-dipole attraction

• dipole-dipole>ionic bond>hydrogen bond>London

• London>dipole-diple>hydrogen bond>ionic bond

• ionic bond>hydrogen bond>dipole-dipole>London

• hydrogen bond>dipole-dipole>London>ionic bond

If fluorine is electronegative then carbon, what charge will the fluorine receive?

• negative

• slight negative

• positive

• slight positive