The triple bond between two carbon atoms in ethyne is formed by.......

What is the number of $\pi$ bonds and $\sigma$ bonds respectively in the given structure?

What is the number of $\sigma$ and $\pi$ bonds in the resonance structure of benzene?

Which of the following overlaps is incorrect (assuming $Z$-axis is the internuclear axis)?
$(A)$ $2p_y + 2p_y \to \pi$-bond formation
$(B)$ $2p_x + 2p_x \to \sigma$-bond formation
$(C)$ $3d_{xy} + 3d_{xy} \to \pi$-bond formation
$(D)$ $2s + 2p_y \to \pi$-bond formation
$(E)$ $3d_{xy} + 3d_{xy} \to \delta$-bond formation
$(F)$ $2p_z + 2p_z \to \sigma$-bond formation

Which type of overlapping results in the formation of a $\pi$ bond?

If the internuclear axis is $z$,then which of the following overlapping gives a $\sigma$ bond?