Which of the following molecules has an octahedral shape?

Which of the following statements is true regarding the $PCl_5$ molecule?
$(i)$ The two axial $P-Cl$ bonds in $PCl_5$ are longer than the three equatorial bonds.
$(ii)$ The axial bonds in $PCl_5$ are stronger than equatorial bonds.
$(iii)$ The axial bonds in $PCl_5$ are more stable than equatorial bonds.
$(iv)$ All five bonds in $PCl_5$ molecule are equivalent.

In which of the following compounds does the $C$ atom use $sp^3$ hybrid orbitals for bonding?

What is the hybridization of the central atom in $SiF_6^{2-}$ and $[Sn(OH)_6]^{2-}$?

What is meant by hybridisation? The compound $CH_2 = C = CH_2$ contains $sp$ and $sp^2$ hybridised carbon atoms. Will it be a planar molecule?

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