Question

Which one of the following exhibits dipole-dipole attraction between molecules? options: A) C10H22 B) CF4 C) SF6 D) O2 E) NH3

Answer 1

During dipole dipole interaction , the partially negative end of one molecule attracts the partially positive end of the other molecule.

Dipole - dipole forces are present in polar molecules .

Those molecules which have electronegativity difference of 0.5 to 1.8 and have resultant dipole moment are polar.

Electronegativity values are ,

C = 2.5

S = 2.5

F = 4.0

O = 3.5

N = 3.0

H = 2.1

CF4 and SF6 are non polar as they have ideal geometry as a result of which dipole moments cancel each other and molecules are non polar.

Hence NH3 is a polar molecule and have resultant dipole Moment due to pyramidal geometry.

NH3 will have dipole dipole forces.

Answer -- NH3