question_answer

In which of the following molecules/ions \[TiF_{6}^{2-},CoF_{6}^{3-},C{{u}_{2}}C{{l}_{2}}\]and \[NiCl_{4}^{2-}\]the central atom is sp2 hybridised ?

A) \[Ti=22,co=27,Cu=29,Ni=28\]and\[TiF_{6}^{2-}\]

B)        \[CoF_{6}^{3-}\]and\[C{{u}_{2}}C{{l}_{2}}\]

C)                        \[NO_{2}^{-}\] and\[TiF_{6}^{2-}\]  

D)         \[C{{u}_{2}}C{{l}_{2}}\]and\[CoF_{6}^{3-}\]

Correct Answer: D

Solution :

Key Idea For \[\to \]hybridisation, there must be either \[\to \]bonds or \[\to \]bonds and one lone pair of electrons in the molecule or ions. \[\to \]bonds, ie, \[\to \]hybridisation \[\to \]bonds +1 lone pair of electrons ie, \[\to \]hybridisation \[\to \] bonds +2 lone pairs, ie, \[\to \]hybridisation \[\to \]bonds +2 lone pairs, ie, \[\to \]hybridisation Thus, in \[\to \]and \[\to \]central atom is sp2 hybridised.