PLEASE HELP!! THANK YOU! 1. Identify the major attractive force in: I. HF ---->

Question

PLEASE HELP!! THANK YOU!

1. Identify the major attractive force in:

I. HF ----> A) London dispersion forces B) dipole-dipole interactions C) hydrogen bonding D) ionic bonding E) none of these

II. Ne ---> A) London dispersion forces B) dipole-dipole interactions C) hydrogen bonding D) ionic bonding E) none of these

2. On a relative basis, the weaker the intermolecular forces in a substance,

A) the greater its heat of vaporization B) the more it deviates from ideal gas behavior C) the greater its vapor pressure D) the higher its melting point E) non of these

THANK YOU SO MUCH!!

Explanation / Answer

(1)

(I) (c) Hydrogen bonding among the HF molecules due to larger difference in electronegativities of H and F

(II) (a) London forces due to its ability to exist as monoatomic gas,

(2) (C)Weaker the intermolecular forces more is the ability to escape into vapour state, Hence it exhibits more vapour pressure.

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