What is the $C - C$ bond length in molecules with $sp^2$ hybridization (in $\mathring{A}$)?

In which of the following pairs do both the species have $sp^{3}$ hybridization?

What do we get from the hybridization of one $s$ and one $p$ orbital?

The hybridisation state of chlorine in $ClF_3$ is

Choose the correct code of characteristics for the given order of hybrid orbitals of the same atom,$sp < sp^2 < sp^3$:
$(i)$ Electronegativity
$(ii)$ Bond angle between same hybrid orbitals
$(iii)$ Size
$(iv)$ Energy level

$sp^3d^2$ hybrid orbitals result in which geometry?