(i) Explain the shape of following molecule by using VSEPR theory. (a) BeCl_(2) (b) NH_(3) (c) H_(2)O (ii) Which bond is stronger or sigma or pi ? Why?

(i) Explain the shape of following molecule by using VSEPR theory. (a

1.	(i) Explain the shape of following molecule by using VSEPR theory. (a) BeCl_(2) (b) NH_(3) (c) H_(2)O (ii) Which bond is stronger or sigma or pi ? Why?
Answer» Solution :(i) (ii) * Sigma bonds `(sigma)` are stronger than PI bonds `(pi)`. Because, sigma bonds are formed from bonding orbitals directly between the NUCLEI of the bonding ATOMS, resulting in greater overlap and a strong sigma BOND (axial overlapping). * Pi bonds results from overlap of atomic orbitals that are in contact through two areas of overlap (lateral overlapping). Pi bonds are more diffused bonds than sigma bonds.