Question

Identify the polarity and met dipole moment
for the following molecules ; [the answer
must include the VSEPR structure
@ H₂O
(6) ASES

Answer 1

Answer

Correct option is

A

BF  

3

​

<H  

2

​

S<H  

2

​

O

In BF  

3

​

, dipole moment is zero due to its symmetrical structure. Summations of all dipoles are zero.

In H  

2

​

S and H  

2

​

O due to unsymmetrical structure net +ve dipole is there. H  

2

​

O has a higher dipole due to the higher electronegativity of oxygen than sulphur.

Hence, the correct order is: BF  

3

​

<H  

2

​

S<H  

2

​

O.