Question

decide which intermolecular forces act between the molecules of each compound in the table below.

compound	intermolecular forces (check all that apply)
sih₄<br>silane	✓	✓	✓
hclo<br>hypochlorous acid	✓		✓
cos<br>carbonyl sulfide	✓	✓
ch₂o<br>formaldehyde	✓

Explanation:

Step1: Analyze SiH₄

SiH₄ is a non - polar molecule. All molecules have dispersion forces. Since it is non - polar, it has no dipole - dipole forces. Also, there is no H attached to a highly electronegative atom (N, O, F), so no hydrogen - bonding. So it has only dispersion forces.

Step2: Analyze HClO

HClO is a polar molecule. All molecules have dispersion forces. Due to its polarity, it has dipole - dipole forces. Also, it has H attached to O, so it has hydrogen - bonding.

Step3: Analyze COS

COS is a polar molecule. All molecules have dispersion forces. Because of its polarity, it has dipole - dipole forces. There is no H attached to N, O, F, so no hydrogen - bonding.

Step4: Analyze CH₂O

CH₂O is a polar molecule. All molecules have dispersion forces. Due to its polarity, it has dipole - dipole forces. There is no H attached to N, O, F, so no hydrogen - bonding.

Answer:

compound	dispersion	dipole	hydrogen - bonding
HClO	√	√	√
COS	√	√
CH₂O	√	√