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 :`implies` `to2p_(PI)-3d_(pi)` back bond `to` can exhibit intermolecular H-bonding as H-atom is BOUND in O-atom. `to` PROTON donor acid: basicity=4 `implies` `to` back is absent. `to`can FORM intermolecular H-bonding as H-atom is directly bounded to O-atom `to`Proton donor acid, basicity=2 `to` Hypervalent, Number of `e^(-)` at Se=12 `implies` `to2p_(pi)-2d_(pi)` back bond of present `to`Hypervalent as number of `e^(-)s` atj B-atom=6 `to` does not fornish `H^(+)` `implies` `to2p_(pi)-2d_(pi)` back bond is present `to` can form intermolecular H-bonding as H-atom is directly bonded to N-atom hypervalent number of `e^(-)s` B-atom=6 `to` Does not furnish `H^(+)`