Question

For each of the following substances, identify the intermolecular force or forces that predominate. Using your knowledge of the relative strength of the vaious forces, rank the substance in order of their normal boiling points. `Al_(2)O_(3), F_(2), H_(2)O, Br_(2), IC l, NaCl`
A. `F_(2) lt Br_(2) lt IC l`
B. `H_(2)O lt NaCl lt Al_(2)O_(3)`
C. `ICl lt H_(2)O`
D. `H_(2)O lt ICl`

Answer 1

Correct Answer - A::B::C
`A_(2)O_(3)-` ionic `Br_(2)`- vanderwaal `F_(2)-` vanderwaal
ICl - dipole dipole `H_(2)O` - dipole - dipole (H - bonding) NaCl - ionic
`F_(2) lt Br_(2) lt ICl lt H_(2)O lt NaCl lt Al_(2)O_(3)`