Question

1. Which type of intermolecular attractive force operates between all molecules?

Answer 1

Answer:

1↔C  2↔A  3↔D

Explanation:

London dispersion forces are weak Vanderwal forces that exists between

all molecules.

Dipole-dipole forces operates between polar molecules because of the attraction between slightly developed opposite charges.

Hydrogen-bonding is the strongest dipole-dipole interaction because of the largest electronegativity difference between hydrogen atom and the most electronegative atoms like F,O,N.

Answer 2

Answer:

1) C

2)A

3)D

Explanation:

London forces are common to all molecules, it results from momentary shifts in electron distribution in molecules. When molecules possess a permanent dipole, dipole-dipole interaction is the dominant intermolecular force. However, for compounds in which hydrogen is bonded to highly electronegative element, hydrogen bonding is important.