Orbital Overlap Concept — Prelims Questions

Which of the following molecules contains the highest number of pi ($\pi$) bonds?

Which type of orbital overlap is responsible for the formation of a sigma bond in the $\text{HCl}$ molecule?

Which of the following statements about pi ($\pi$) bonds is incorrect?

Which of the following overlaps would result in zero (or no net) overlap, meaning no bond formation?

Consider the molecule $\text{CH}_3\text{COOH}$ (acetic acid). How many sigma ($\sigma$) and pi ($\pi$) bonds are present in this molecule?

Which of the following orbital overlaps would lead to the strongest sigma bond, assuming similar principal quantum numbers?