CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If the AB4 molecule is a polar molecule, a possible geometry of AB4 is:


A

Square planar

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

Tetrahedral

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

Square pyramidal

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D

Rectangular planar

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C

Square pyramidal


Explanation for the correct option:

For AB4​ compound possible geometry is:

Structure with sp3d2 hybridization is polar due to lone pair moment while in other possibilities molecules are non-polar.
Square pyramidal can be polar due to lone pair moments as the bond pair moments will get canceled out.

(c) Square pyramidal:

If AB4 molecule is a square pyramidal then it has one lone pair and their structure should be

and it should be polar because the dipole moment of the lone pair of 'A' never is canceled by others.

Explanation for the incorrect option:

(a) Square planar:

If AB4 molecule is a square planar.

it should be non-polar because the vector sum of dipole moment is zero.

(b) Tetrahedral:

If AB4 molecule is tetrahedral then it has no lone pair and their structure should be

and it should be non-polar due to perfect symmetry.

(d) Rectangular planar:

If AB4 molecule is a rectangular planer then

it should be nonpolar because the vector sum of dipole moment is zero.

Final Answer: Hence the correct answer is an option (c)


flag
Suggest Corrections
thumbs-up
22
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
VSEPR Theory and Dipole Moment
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon