Question

Which of the following molecule/molecules will be have zero dipole moment?
$H_{2}O,C{O}_2,CC{l}_4,CHC{l}_3,N{H}_3,B{F}_3,Be{F}_2$

Answer 1

$⟶$ Dipole moment:- The polarity of covalent bond can be conveniently measured in terms of physical quantity called dipole moment.

(i) (Refer to Image 1)

(ii) (Refer to Image 2)

(iii) (Refer to Image 3)

(iv) (Refer to Image 4)

$⟶$ Above molecules have dipole moment zero. Because dipoles of the bond cancel each other.