Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Column-I and Column-II contains four entries each. Entries of Column -

1.	Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.
Answer» Solution : `toSi-O-Si=144^(@)` `to`Hybridization of O-atom changed to `sp^(2)` `to` In `2p_(pi)-3d_(pi)` back bonding non-axial d-orbital of `t_(2g)` is used `to`Electron density at O-atom decrease (b) `toangleCl-O-Cl` increase due to back bonding and steric repulsion between both Cl-atoms `to` Hybridization of C remains `sp^(2)` `to` Electron density increase at central C-atom. (c) `to` Electron density at Si-atom increase due to `2p_(pi)-3d_(pi)` back bonding `to` Non-axial d-orbital of `t_(2g)` set of orbitals is involved in back bonding `to` All `O-Si-O` remains at `109^(@)28.` because all FOUR substituents are same (d) `to` hybridization of central does not change. `to` Electron density at B-atom increase `to` All `N-B-N` remain same as all three substituentare same.