Question

Two compounds of A and B have similar formula $A{X}_3$ and $B{X}_3$ respectively. But, the compound of A has the dipole moment and dipole moment of the compound of B is zero. Which of the following statements is true regarding compounds of A & B?

• A. A and B are iso structural.
• B. A may have lone pair on central atom whereas B has no lone pair.
• C. A and B differ wrt type of hybridisation of central atom.
• D. All the above.

Answer 1

The correct option is C A and B differ wrt type of hybridisation of central atom.

A and B differ wrt type of hybridization of central atom. 'B' may have lone pair on central atom whereas 'A' has no lone pair.
'A' has dipole moment as it is trigonal planar in which individual bond dipoles cancel each other and dipole moment of 'B' is zero as it has pyramidal geometry in which individual bond dipoles do not cancel each other.