Question

If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure The central X atom is single bonded to two Y atoms, which are 180 degrees apart. The X atom has two lone pairs. could be abbreviated as XY2Z2. Classify each molecule according to its shape.Molecular Geometries: (A) linear(B) bent 120(C) bent 109(D) trigonal pyramidal(E) T-shaped(F) see saw(G) square planar(H) square pyramidalPossiblities:(1) XY4Z2(2) XY5Z(3) XY2Z(4) XY2Z3(5) XY4Z(6) XY2Z2(7) XY3Z2(8) XY3Z

Answer 1

Answer:

(C) bent 109

(2) $XY_5Z$

Explanation:

The number of bond pairs = 2

Number of lone pairs = 2

The general formula is - $XY_2Z_2$

According to VSEPR theory, the atoms will form a geometry in such a way that there is minimum repulsion and maximum stability.  

The central atom has 2 bond pairs and 2 lone pairs. Hybridization is sp³. The geometry is bent shape which has an angle of approximately 105.5°. It original has angle of 109.5° but due to lone pair repulsion, it reduces.

Answer - (C) bent 109

Square pyramidal possibility:- (2) $XY_5Z$

The central atom has 5 bond pairs and 1 lone pair. Hybridization is sp³d. The geometry is square pyramidal in which the equatorial bonds has an angle of 120° and axial bond has an angle of 90°.