What type of overlap is involved in the formation of $C-H$ bonds in acetylene molecules?

Provide the orbital structure of ethene showing: $(i)$ $\sigma$-bond $(ii)$ $\pi$-bond $(iii)$ The number of $\sigma$ and $\pi$-bonds $(iv)$ The hybridization.

Which of the following species/ions has an octahedral geometry?

In methane,the bond angle is $......^o$.

Which of the following geometries corresponds to $sp^3d$ hybridization of the central atom?

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.