Question

Classify each substance based on the intermolecular forces present in that substance. Hydrogen bonding, dipole–dipole, and dispersionDipole–dipole and dispersion only Dispersion only
H20
CH4
CO
CH3Cl

Answer 1

Let us understand the inter molecular forces in brief

a) hydrogen bond: it is an interaction between a highly electro-negative element (F,O or N) and a hydrogen attached to a highly electro-negative element (F,O or N)

b) Dipole dipole interaction : the interaction is present in a molecule where bonds are polar [due to electro-negativity difference between bonded atoms]

c) Dispersion forces: these are weakest inter-molecular forces present between any two atoms due to development of temporary dipoles.

this is present in all molecules

In water  or $H_{2}O$: Hydrogen bonding, dipole–dipole, and dispersion

Where hydrogen is attached to oxygen and can form hydrogen bond

In CO  and CH3Cl: Dipole–dipole and dispersion only

In case of methane: there is no polar bond, no highly electronegative element so they have only Dispersion forces