The correct order of electronegativity of carbon in various hybridization states:

The hybridisation and shape of $I_3^{-}$ ion,respectively,are

Explain the hybridization of carbon and the bond structure in the ethyne $(C_2H_2)$ molecule.

Which of the following compounds exhibits $sp^2$ hybridization?

Fill in the blanks:
$(i)$ Based on the type of overlapping,covalent bonds are classified into ........ and .......... .
$(ii)$ The bond formation involving hybrid orbitals is called ............. .
$(iii)$ The type of hybridization observed in the $C_2H_6$ molecule is ........... .
$(iv)$ The type of hybridization observed in the $BrF_5$ complex is ............... .

If $p_x$ and $p_y$ orbitals participate in $sp^2$ hybridisation of the sulphur atom in $SO_3$,then the $d$ orbitals which are used in $p\pi-d\pi$ bonds are