Polarity and Intermolecular Forces

Which of the following will NOT have hydrogen bonding?

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In a polar covalent bond, the electrons gather around...

• Mostly the atom with the greatest electronegativity

• The atom with the lowest electronegativity

• Each atom equally

• Only the atom with the greatest electronegativity

Tags

NGSS.HS-PS1-1

In a nonpolar covalent bond, the electrons gather around...

• Mostly the atom with the greatest electronegativity

• The atom with the lowest electronegativity

• Each atom Equally

• Only the atom with the greatest electronegativity

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

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

Is this molecule polar or non-polar?

• Polar

• Non-polar

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